From: alexandra <alexandra@sai>
This work is part of Outreach Program for Women Summer 2014 activities.
---
libavformat/asfdec.c | 1522 -------------------------------------------------
libavformat/asfdec2.c | 1425 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 1425 insertions(+), 1522 deletions(-)
delete mode 100644 libavformat/asfdec.c
create mode 100644 libavformat/asfdec2.c
diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
deleted file mode 100644
index 85e800d..0000000
--- a/libavformat/asfdec.c
+++ /dev/null
@@ -1,1522 +0,0 @@
-/*
- * ASF compatible demuxer
- * Copyright (c) 2000, 2001 Fabrice Bellard
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * Libav is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <inttypes.h>
-
-#include "libavutil/attributes.h"
-#include "libavutil/avassert.h"
-#include "libavutil/avstring.h"
-#include "libavutil/bswap.h"
-#include "libavutil/common.h"
-#include "libavutil/dict.h"
-#include "libavutil/internal.h"
-#include "libavutil/mathematics.h"
-#include "libavutil/opt.h"
-#include "avformat.h"
-#include "avio_internal.h"
-#include "avlanguage.h"
-#include "id3v2.h"
-#include "internal.h"
-#include "riff.h"
-#include "asf.h"
-#include "asfcrypt.h"
-
-typedef struct {
- const AVClass *class;
- int asfid2avid[128]; ///< conversion table from asf ID 2
AVStream ID
- ASFStream streams[128]; ///< it's max number and it's not
that big
- uint32_t stream_bitrates[128]; ///< max number of streams, bitrate
for each (for streaming)
- AVRational dar[128];
- char stream_languages[128][6]; ///< max number of streams, language
for each (RFC1766, e.g. en-US)
- /* non streamed additonnal info */
- /* packet filling */
- int packet_size_left;
- /* only for reading */
- uint64_t data_offset; ///< beginning of the first data
packet
- uint64_t data_object_offset; ///< data object offset (excl. GUID &
size)
- uint64_t data_object_size; ///< size of the data object
- int index_read;
-
- ASFMainHeader hdr;
-
- int packet_flags;
- int packet_property;
- int packet_timestamp;
- int packet_segsizetype;
- int packet_segments;
- int packet_seq;
- int packet_replic_size;
- int packet_key_frame;
- int packet_padsize;
- unsigned int packet_frag_offset;
- unsigned int packet_frag_size;
- int64_t packet_frag_timestamp;
- int packet_multi_size;
- int packet_obj_size;
- int packet_time_delta;
- int packet_time_start;
- int64_t packet_pos;
-
- int stream_index;
-
- ASFStream *asf_st; ///< currently decoded stream
-
- int no_resync_search;
-} ASFContext;
-
-static const AVOption options[] = {
- { "no_resync_search", "Don't try to resynchronize by looking for a certain
optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_INT,
{ .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
- { NULL },
-};
-
-static const AVClass asf_class = {
- .class_name = "asf demuxer",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
-};
-
-#undef NDEBUG
-#include <assert.h>
-
-#define ASF_MAX_STREAMS 127
-#define FRAME_HEADER_SIZE 17
-// Fix Me! FRAME_HEADER_SIZE may be different.
-
-static const ff_asf_guid index_guid = {
- 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0,
0xc9, 0x03, 0x49, 0xcb
-};
-
-#ifdef DEBUG
-static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
- 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60,
0x97, 0xc9, 0xa2, 0xb2
-};
-
-#define PRINT_IF_GUID(g, cmp) \
- if (!ff_guidcmp(g, &cmp)) \
- av_dlog(NULL, "(GUID: %s) ", # cmp)
-
-static void print_guid(ff_asf_guid *g)
-{
- int i;
- PRINT_IF_GUID(g, ff_asf_header);
- else PRINT_IF_GUID(g, ff_asf_file_header);
- else PRINT_IF_GUID(g, ff_asf_stream_header);
- else PRINT_IF_GUID(g, ff_asf_audio_stream);
- else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
- else PRINT_IF_GUID(g, ff_asf_video_stream);
- else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
- else PRINT_IF_GUID(g, ff_asf_command_stream);
- else PRINT_IF_GUID(g, ff_asf_comment_header);
- else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
- else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
- else PRINT_IF_GUID(g, ff_asf_data_header);
- else PRINT_IF_GUID(g, index_guid);
- else PRINT_IF_GUID(g, ff_asf_head1_guid);
- else PRINT_IF_GUID(g, ff_asf_head2_guid);
- else PRINT_IF_GUID(g, ff_asf_my_guid);
- else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
- else PRINT_IF_GUID(g, ff_asf_extended_content_header);
- else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
- else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
- else PRINT_IF_GUID(g, ff_asf_metadata_header);
- else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
- else PRINT_IF_GUID(g, ff_asf_marker_header);
- else PRINT_IF_GUID(g, stream_bitrate_guid);
- else PRINT_IF_GUID(g, ff_asf_language_guid);
- else
- av_dlog(NULL, "(GUID: unknown) ");
- for (i = 0; i < 16; i++)
- av_dlog(NULL, " 0x%02x,", (*g)[i]);
- av_dlog(NULL, "}\n");
-}
-#undef PRINT_IF_GUID
-#else
-#define print_guid(g)
-#endif
-
-static int asf_probe(AVProbeData *pd)
-{
- /* check file header */
- if (!ff_guidcmp(pd->buf, &ff_asf_header))
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-/* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
- * but 16 bit for "Metadata Object" and "Metadata Library Object" */
-static int get_value(AVIOContext *pb, int type, int type2_size)
-{
- switch (type) {
- case 2:
- return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
- case 3:
- return avio_rl32(pb);
- case 4:
- return avio_rl64(pb);
- case 5:
- return avio_rl16(pb);
- default:
- return INT_MIN;
- }
-}
-
-/* MSDN claims that this should be "compatible with the ID3 frame, APIC",
- * but in reality this is only loosely similar */
-static int asf_read_picture(AVFormatContext *s, int len)
-{
- AVPacket pkt = { 0 };
- const CodecMime *mime = ff_id3v2_mime_tags;
- enum AVCodecID id = AV_CODEC_ID_NONE;
- char mimetype[64];
- uint8_t *desc = NULL;
- AVStream *st = NULL;
- int ret, type, picsize, desc_len;
-
- /* type + picsize + mime + desc */
- if (len < 1 + 4 + 2 + 2) {
- av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
- return AVERROR_INVALIDDATA;
- }
-
- /* picture type */
- type = avio_r8(s->pb);
- len--;
- if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
- av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n",
type);
- type = 0;
- }
-
- /* picture data size */
- picsize = avio_rl32(s->pb);
- len -= 4;
-
- /* picture MIME type */
- len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
- while (mime->id != AV_CODEC_ID_NONE) {
- if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
- id = mime->id;
- break;
- }
- mime++;
- }
- if (id == AV_CODEC_ID_NONE) {
- av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
- mimetype);
- return 0;
- }
-
- if (picsize >= len) {
- av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >=
%d.\n",
- picsize, len);
- return AVERROR_INVALIDDATA;
- }
-
- /* picture description */
- desc_len = (len - picsize) * 2 + 1;
- desc = av_malloc(desc_len);
- if (!desc)
- return AVERROR(ENOMEM);
- len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
-
- ret = av_get_packet(s->pb, &pkt, picsize);
- if (ret < 0)
- goto fail;
-
- st = avformat_new_stream(s, NULL);
- if (!st) {
- ret = AVERROR(ENOMEM);
- goto fail;
- }
- st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = id;
- st->attached_pic = pkt;
- st->attached_pic.stream_index = st->index;
- st->attached_pic.flags |= AV_PKT_FLAG_KEY;
-
- if (*desc)
- av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
- else
- av_freep(&desc);
-
- av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
-
- return 0;
-
-fail:
- av_freep(&desc);
- av_free_packet(&pkt);
- return ret;
-}
-
-static void get_id3_tag(AVFormatContext *s, int len)
-{
- ID3v2ExtraMeta *id3v2_extra_meta = NULL;
-
- ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
- if (id3v2_extra_meta)
- ff_id3v2_parse_apic(s, &id3v2_extra_meta);
- ff_id3v2_free_extra_meta(&id3v2_extra_meta);
-}
-
-static void get_tag(AVFormatContext *s, const char *key, int type, int len,
int type2_size)
-{
- char *value;
- int64_t off = avio_tell(s->pb);
-
- if ((unsigned)len >= (UINT_MAX - 1) / 2)
- return;
-
- value = av_malloc(2 * len + 1);
- if (!value)
- goto finish;
-
- if (type == 0) { // UTF16-LE
- avio_get_str16le(s->pb, len, value, 2 * len + 1);
- } else if (type == 1) { // byte array
- if (!strcmp(key, "WM/Picture")) { // handle cover art
- asf_read_picture(s, len);
- } else if (!strcmp(key, "ID3")) { // handle ID3 tag
- get_id3_tag(s, len);
- } else {
- av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n",
key);
- }
- goto finish;
- } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
- uint64_t num = get_value(s->pb, type, type2_size);
- snprintf(value, len, "%"PRIu64, num);
- } else if (type == 6) { // (don't) handle GUID
- av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
- goto finish;
- } else {
- av_log(s, AV_LOG_DEBUG,
- "Unsupported value type %d in tag %s.\n", type, key);
- goto finish;
- }
- if (*value)
- av_dict_set(&s->metadata, key, value, 0);
-
-finish:
- av_freep(&value);
- avio_seek(s->pb, off + len, SEEK_SET);
-}
-
-static int asf_read_file_properties(AVFormatContext *s, int64_t size)
-{
- ASFContext *asf = s->priv_data;
- AVIOContext *pb = s->pb;
-
- ff_get_guid(pb, &asf->hdr.guid);
- asf->hdr.file_size = avio_rl64(pb);
- asf->hdr.create_time = avio_rl64(pb);
- avio_rl64(pb); /* number of packets */
- asf->hdr.play_time = avio_rl64(pb);
- asf->hdr.send_time = avio_rl64(pb);
- asf->hdr.preroll = avio_rl32(pb);
- asf->hdr.ignore = avio_rl32(pb);
- asf->hdr.flags = avio_rl32(pb);
- asf->hdr.min_pktsize = avio_rl32(pb);
- asf->hdr.max_pktsize = avio_rl32(pb);
- if (asf->hdr.min_pktsize >= (1U << 29))
- return AVERROR_INVALIDDATA;
- asf->hdr.max_bitrate = avio_rl32(pb);
- s->packet_size = asf->hdr.max_pktsize;
-
- return 0;
-}
-
-static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
-{
- ASFContext *asf = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st;
- ASFStream *asf_st;
- ff_asf_guid g;
- enum AVMediaType type;
- int type_specific_size, sizeX;
- unsigned int tag1;
- int64_t pos1, pos2, start_time;
- int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
-
- if (s->nb_streams == ASF_MAX_STREAMS) {
- av_log(s, AV_LOG_ERROR, "too many streams\n");
- return AVERROR(EINVAL);
- }
-
- pos1 = avio_tell(pb);
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
- asf_st = av_mallocz(sizeof(ASFStream));
- if (!asf_st)
- return AVERROR(ENOMEM);
- st->priv_data = asf_st;
- st->start_time = 0;
- start_time = asf->hdr.preroll;
-
- asf_st->stream_language_index = 128; // invalid stream index means no
language info
-
- if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
- st->duration = asf->hdr.play_time /
- (10000000 / 1000) - start_time;
- }
- ff_get_guid(pb, &g);
-
- test_for_ext_stream_audio = 0;
- if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
- type = AVMEDIA_TYPE_AUDIO;
- } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
- type = AVMEDIA_TYPE_VIDEO;
- } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
- type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = AV_CODEC_ID_MJPEG;
- } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
- type = AVMEDIA_TYPE_DATA;
- } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
- test_for_ext_stream_audio = 1;
- type = AVMEDIA_TYPE_UNKNOWN;
- } else {
- return -1;
- }
- ff_get_guid(pb, &g);
- avio_skip(pb, 8); /* total_size */
- type_specific_size = avio_rl32(pb);
- avio_rl32(pb);
- st->id = avio_rl16(pb) & 0x7f; /* stream id */
- // mapping of asf ID to AV stream ID;
- asf->asfid2avid[st->id] = s->nb_streams - 1;
-
- avio_rl32(pb);
-
- if (test_for_ext_stream_audio) {
- ff_get_guid(pb, &g);
- if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
- type = AVMEDIA_TYPE_AUDIO;
- is_dvr_ms_audio = 1;
- ff_get_guid(pb, &g);
- avio_rl32(pb);
- avio_rl32(pb);
- avio_rl32(pb);
- ff_get_guid(pb, &g);
- avio_rl32(pb);
- }
- }
-
- st->codec->codec_type = type;
- if (type == AVMEDIA_TYPE_AUDIO) {
- int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
- if (ret < 0)
- return ret;
- if (is_dvr_ms_audio) {
- // codec_id and codec_tag are unreliable in dvr_ms
- // files. Set them later by probing stream.
- st->codec->codec_id = AV_CODEC_ID_PROBE;
- st->codec->codec_tag = 0;
- }
- if (st->codec->codec_id == AV_CODEC_ID_AAC)
- st->need_parsing = AVSTREAM_PARSE_NONE;
- else
- st->need_parsing = AVSTREAM_PARSE_FULL;
- /* We have to init the frame size at some point .... */
- pos2 = avio_tell(pb);
- if (size >= (pos2 + 8 - pos1 + 24)) {
- asf_st->ds_span = avio_r8(pb);
- asf_st->ds_packet_size = avio_rl16(pb);
- asf_st->ds_chunk_size = avio_rl16(pb);
- avio_rl16(pb); // ds_data_size
- avio_r8(pb); // ds_silence_data
- }
- if (asf_st->ds_span > 1) {
- if (!asf_st->ds_chunk_size ||
- (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
- asf_st->ds_packet_size % asf_st->ds_chunk_size)
- asf_st->ds_span = 0; // disable descrambling
- }
- } else if (type == AVMEDIA_TYPE_VIDEO &&
- size - (avio_tell(pb) - pos1 + 24) >= 51) {
- avio_rl32(pb);
- avio_rl32(pb);
- avio_r8(pb);
- avio_rl16(pb); /* size */
- sizeX = avio_rl32(pb); /* size */
- st->codec->width = avio_rl32(pb);
- st->codec->height = avio_rl32(pb);
- /* not available for asf */
- avio_rl16(pb); /* panes */
- st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
- tag1 = avio_rl32(pb);
- avio_skip(pb, 20);
- if (sizeX > 40) {
- st->codec->extradata_size = sizeX - 40;
- st->codec->extradata = av_mallocz(st->codec->extradata_size +
-
FF_INPUT_BUFFER_PADDING_SIZE);
- avio_read(pb, st->codec->extradata, st->codec->extradata_size);
- }
-
- /* Extract palette from extradata if bpp <= 8 */
- /* This code assumes that extradata contains only palette */
- /* This is true for all paletted codecs implemented in libavcodec */
- if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <=
8)) {
-#if HAVE_BIGENDIAN
- int i;
- for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) /
4; i++)
- asf_st->palette[i] = av_bswap32(((uint32_t
*)st->codec->extradata)[i]);
-#else
- memcpy(asf_st->palette, st->codec->extradata,
- FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
-#endif
- asf_st->palette_changed = 1;
- }
-
- st->codec->codec_tag = tag1;
- st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
- if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
- st->need_parsing = AVSTREAM_PARSE_FULL;
- /* issue658 contains wrong w/h and MS even puts a fake seq header
- * with wrong w/h in extradata while a correct one is in the
stream.
- * maximum lameness */
- st->codec->width =
- st->codec->height = 0;
- av_freep(&st->codec->extradata);
- st->codec->extradata_size = 0;
- }
- if (st->codec->codec_id == AV_CODEC_ID_H264)
- st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
- }
- pos2 = avio_tell(pb);
- avio_skip(pb, size - (pos2 - pos1 + 24));
-
- return 0;
-}
-
-static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
-{
- ASFContext *asf = s->priv_data;
- AVIOContext *pb = s->pb;
- ff_asf_guid g;
- int ext_len, payload_ext_ct, stream_ct, i;
- uint32_t leak_rate, stream_num;
- unsigned int stream_languageid_index;
-
- avio_rl64(pb); // starttime
- avio_rl64(pb); // endtime
- leak_rate = avio_rl32(pb); // leak-datarate
- avio_rl32(pb); // bucket-datasize
- avio_rl32(pb); // init-bucket-fullness
- avio_rl32(pb); // alt-leak-datarate
- avio_rl32(pb); // alt-bucket-datasize
- avio_rl32(pb); // alt-init-bucket-fullness
- avio_rl32(pb); // max-object-size
- avio_rl32(pb); // flags
(reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits
reserved)
- stream_num = avio_rl16(pb); // stream-num
-
- stream_languageid_index = avio_rl16(pb); // stream-language-id-index
- if (stream_num < 128)
- asf->streams[stream_num].stream_language_index =
stream_languageid_index;
-
- avio_rl64(pb); // avg frametime in 100ns units
- stream_ct = avio_rl16(pb); // stream-name-count
- payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
-
- if (stream_num < 128)
- asf->stream_bitrates[stream_num] = leak_rate;
-
- for (i = 0; i < stream_ct; i++) {
- avio_rl16(pb);
- ext_len = avio_rl16(pb);
- avio_skip(pb, ext_len);
- }
-
- for (i = 0; i < payload_ext_ct; i++) {
- ff_get_guid(pb, &g);
- avio_skip(pb, 2);
- ext_len = avio_rl32(pb);
- avio_skip(pb, ext_len);
- }
-
- return 0;
-}
-
-static int asf_read_content_desc(AVFormatContext *s, int64_t size)
-{
- AVIOContext *pb = s->pb;
- int len1, len2, len3, len4, len5;
-
- len1 = avio_rl16(pb);
- len2 = avio_rl16(pb);
- len3 = avio_rl16(pb);
- len4 = avio_rl16(pb);
- len5 = avio_rl16(pb);
- get_tag(s, "title", 0, len1, 32);
- get_tag(s, "author", 0, len2, 32);
- get_tag(s, "copyright", 0, len3, 32);
- get_tag(s, "comment", 0, len4, 32);
- avio_skip(pb, len5);
-
- return 0;
-}
-
-static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
-{
- AVIOContext *pb = s->pb;
- ASFContext *asf = s->priv_data;
- int desc_count, i, ret;
-
- desc_count = avio_rl16(pb);
- for (i = 0; i < desc_count; i++) {
- int name_len, value_type, value_len;
- char name[1024];
-
- name_len = avio_rl16(pb);
- if (name_len % 2) // must be even, broken lavf versions wrote len-1
- name_len += 1;
- if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) <
name_len)
- avio_skip(pb, name_len - ret);
- value_type = avio_rl16(pb);
- value_len = avio_rl16(pb);
- if (!value_type && value_len % 2)
- value_len += 1;
- /* My sample has that stream set to 0 maybe that mean the container.
- * ASF stream count starts at 1. I am using 0 to the container value
- * since it's unused. */
- if (!strcmp(name, "AspectRatioX"))
- asf->dar[0].num = get_value(s->pb, value_type, 32);
- else if (!strcmp(name, "AspectRatioY"))
- asf->dar[0].den = get_value(s->pb, value_type, 32);
- else
- get_tag(s, name, value_type, value_len, 32);
- }
-
- return 0;
-}
-
-static int asf_read_language_list(AVFormatContext *s, int64_t size)
-{
- AVIOContext *pb = s->pb;
- ASFContext *asf = s->priv_data;
- int j, ret;
- int stream_count = avio_rl16(pb);
- for (j = 0; j < stream_count; j++) {
- char lang[6];
- unsigned int lang_len = avio_r8(pb);
- if ((ret = avio_get_str16le(pb, lang_len, lang,
- sizeof(lang))) < lang_len)
- avio_skip(pb, lang_len - ret);
- if (j < 128)
- av_strlcpy(asf->stream_languages[j], lang,
- sizeof(*asf->stream_languages));
- }
-
- return 0;
-}
-
-static int asf_read_metadata(AVFormatContext *s, int64_t size)
-{
- AVIOContext *pb = s->pb;
- ASFContext *asf = s->priv_data;
- int n, stream_num, name_len, value_len;
- int ret, i;
- n = avio_rl16(pb);
-
- for (i = 0; i < n; i++) {
- char name[1024];
- int value_type;
-
- avio_rl16(pb); // lang_list_index
- stream_num = avio_rl16(pb);
- name_len = avio_rl16(pb);
- value_type = avio_rl16(pb); /* value_type */
- value_len = avio_rl32(pb);
-
- if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) <
name_len)
- avio_skip(pb, name_len - ret);
- av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
- i, stream_num, name_len, value_type, value_len, name);
-
- if (!strcmp(name, "AspectRatioX")){
- int aspect_x = get_value(s->pb, value_type, 16);
- if(stream_num < 128)
- asf->dar[stream_num].num = aspect_x;
- } else if(!strcmp(name, "AspectRatioY")){
- int aspect_y = get_value(s->pb, value_type, 16);
- if(stream_num < 128)
- asf->dar[stream_num].den = aspect_y;
- } else {
- get_tag(s, name, value_type, value_len, 16);
- }
- }
-
- return 0;
-}
-
-static int asf_read_marker(AVFormatContext *s, int64_t size)
-{
- AVIOContext *pb = s->pb;
- ASFContext *asf = s->priv_data;
- int i, count, name_len, ret;
- char name[1024];
-
- avio_rl64(pb); // reserved 16 bytes
- avio_rl64(pb); // ...
- count = avio_rl32(pb); // markers count
- avio_rl16(pb); // reserved 2 bytes
- name_len = avio_rl16(pb); // name length
- for (i = 0; i < name_len; i++)
- avio_r8(pb); // skip the name
-
- for (i = 0; i < count; i++) {
- int64_t pres_time;
- int name_len;
-
- avio_rl64(pb); // offset, 8 bytes
- pres_time = avio_rl64(pb); // presentation time
- pres_time -= asf->hdr.preroll * 10000;
- avio_rl16(pb); // entry length
- avio_rl32(pb); // send time
- avio_rl32(pb); // flags
- name_len = avio_rl32(pb); // name length
- if ((ret = avio_get_str16le(pb, name_len * 2, name,
- sizeof(name))) < name_len)
- avio_skip(pb, name_len - ret);
- avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
- AV_NOPTS_VALUE, name);
- }
-
- return 0;
-}
-
-static int asf_read_header(AVFormatContext *s)
-{
- ASFContext *asf = s->priv_data;
- ff_asf_guid g;
- AVIOContext *pb = s->pb;
- int i;
- int64_t gsize;
-
- ff_get_guid(pb, &g);
- if (ff_guidcmp(&g, &ff_asf_header))
- return -1;
- avio_rl64(pb);
- avio_rl32(pb);
- avio_r8(pb);
- avio_r8(pb);
- memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
- for (;;) {
- uint64_t gpos = avio_tell(pb);
- ff_get_guid(pb, &g);
- gsize = avio_rl64(pb);
- print_guid(&g);
- if (!ff_guidcmp(&g, &ff_asf_data_header)) {
- asf->data_object_offset = avio_tell(pb);
- /* If not streaming, gsize is not unlimited (how?),
- * and there is enough space in the file.. */
- if (!(asf->hdr.flags & 0x01) && gsize >= 100)
- asf->data_object_size = gsize - 24;
- else
- asf->data_object_size = (uint64_t)-1;
- break;
- }
- if (gsize < 24)
- return -1;
- if (!ff_guidcmp(&g, &ff_asf_file_header)) {
- int ret = asf_read_file_properties(s, gsize);
- if (ret < 0)
- return ret;
- } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
- int ret = asf_read_stream_properties(s, gsize);
- if (ret < 0)
- return ret;
- } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
- asf_read_content_desc(s, gsize);
- } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
- asf_read_language_list(s, gsize);
- } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
- asf_read_ext_content_desc(s, gsize);
- } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
- asf_read_metadata(s, gsize);
- } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
- asf_read_metadata(s, gsize);
- } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
- asf_read_ext_stream_properties(s, gsize);
-
- // there could be a optional stream properties object to follow
- // if so the next iteration will pick it up
- continue;
- } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
- ff_get_guid(pb, &g);
- avio_skip(pb, 6);
- continue;
- } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
- asf_read_marker(s, gsize);
- } else if (pb->eof_reached) {
- return -1;
- } else {
- if (!s->keylen) {
- if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
- av_log(s, AV_LOG_WARNING,
- "DRM protected stream detected, decoding will
likely fail!\n");
- } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
- av_log(s, AV_LOG_WARNING,
- "Ext DRM protected stream detected, decoding will
likely fail!\n");
- } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
- av_log(s, AV_LOG_WARNING,
- "Digital signature detected, decoding will likely
fail!\n");
- }
- }
- }
- if (avio_tell(pb) != gpos + gsize)
- av_log(s, AV_LOG_DEBUG,
- "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
- avio_tell(pb) - gpos, gsize);
- avio_seek(pb, gpos + gsize, SEEK_SET);
- }
- ff_get_guid(pb, &g);
- avio_rl64(pb);
- avio_r8(pb);
- avio_r8(pb);
- if (pb->eof_reached)
- return -1;
- asf->data_offset = avio_tell(pb);
- asf->packet_size_left = 0;
-
- for (i = 0; i < 128; i++) {
- int stream_num = asf->asfid2avid[i];
- if (stream_num >= 0) {
- AVStream *st = s->streams[stream_num];
- if (!st->codec->bit_rate)
- st->codec->bit_rate = asf->stream_bitrates[i];
- if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
- av_reduce(&st->sample_aspect_ratio.num,
- &st->sample_aspect_ratio.den,
- asf->dar[i].num, asf->dar[i].den, INT_MAX);
- } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
- // Use ASF container value if the stream doesn't set AR.
- (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
- av_reduce(&st->sample_aspect_ratio.num,
- &st->sample_aspect_ratio.den,
- asf->dar[0].num, asf->dar[0].den, INT_MAX);
-
- av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d
sar=%d:%d\n",
- i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
- st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
-
- // copy and convert language codes to the frontend
- if (asf->streams[i].stream_language_index < 128) {
- const char *rfc1766 =
asf->stream_languages[asf->streams[i].stream_language_index];
- if (rfc1766 && strlen(rfc1766) > 1) {
- const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0'
}; // ignore country code if any
- const char *iso6392 = av_convert_lang_to(primary_tag,
-
AV_LANG_ISO639_2_BIBL);
- if (iso6392)
- av_dict_set(&st->metadata, "language", iso6392, 0);
- }
- }
- }
- }
-
- ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
-
- return 0;
-}
-
-#define DO_2BITS(bits, var, defval) \
- switch (bits & 3) { \
- case 3: \
- var = avio_rl32(pb); \
- rsize += 4; \
- break; \
- case 2: \
- var = avio_rl16(pb); \
- rsize += 2; \
- break; \
- case 1: \
- var = avio_r8(pb); \
- rsize++; \
- break; \
- default: \
- var = defval; \
- break; \
- }
-
-/**
- * Load a single ASF packet into the demuxer.
- * @param s demux context
- * @param pb context to read data from
- * @return 0 on success, <0 on error
- */
-static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
-{
- ASFContext *asf = s->priv_data;
- uint32_t packet_length, padsize;
- int rsize = 8;
- int c, d, e, off;
-
- // if we do not know packet size, allow skipping up to 32 kB
- off = 32768;
- if (asf->no_resync_search)
- off = 3;
- else if (s->packet_size > 0)
- off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
-
- c = d = e = -1;
- while (off-- > 0) {
- c = d;
- d = e;
- e = avio_r8(pb);
- if (c == 0x82 && !d && !e)
- break;
- }
-
- if (c != 0x82) {
- /* This code allows handling of -EAGAIN at packet boundaries (i.e.
- * if the packet sync code above triggers -EAGAIN). This does not
- * imply complete -EAGAIN handling support at random positions in
- * the stream. */
- if (pb->error == AVERROR(EAGAIN))
- return AVERROR(EAGAIN);
- if (!pb->eof_reached)
- av_log(s, AV_LOG_ERROR,
- "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
- }
- if ((c & 0x8f) == 0x82) {
- if (d || e) {
- if (!pb->eof_reached)
- av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
- return -1;
- }
- c = avio_r8(pb);
- d = avio_r8(pb);
- rsize += 3;
- } else if (!pb->eof_reached) {
- avio_seek(pb, -1, SEEK_CUR); // FIXME
- }
-
- asf->packet_flags = c;
- asf->packet_property = d;
-
- DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
- DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
- DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
-
- // the following checks prevent overflows and infinite loops
- if (!packet_length || packet_length >= (1U << 29)) {
- av_log(s, AV_LOG_ERROR,
- "invalid packet_length %"PRIu32" at:%"PRId64"\n",
- packet_length, avio_tell(pb));
- return -1;
- }
- if (padsize >= packet_length) {
- av_log(s, AV_LOG_ERROR,
- "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize,
avio_tell(pb));
- return -1;
- }
-
- asf->packet_timestamp = avio_rl32(pb);
- avio_rl16(pb); /* duration */
- // rsize has at least 11 bytes which have to be present
-
- if (asf->packet_flags & 0x01) {
- asf->packet_segsizetype = avio_r8(pb);
- rsize++;
- asf->packet_segments = asf->packet_segsizetype & 0x3f;
- } else {
- asf->packet_segments = 1;
- asf->packet_segsizetype = 0x80;
- }
- if (rsize > packet_length - padsize) {
- asf->packet_size_left = 0;
- av_log(s, AV_LOG_ERROR,
- "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32"
at %"PRId64"\n",
- rsize, packet_length, padsize, avio_tell(pb));
- return -1;
- }
- asf->packet_size_left = packet_length - padsize - rsize;
- if (packet_length < asf->hdr.min_pktsize)
- padsize += asf->hdr.min_pktsize - packet_length;
- asf->packet_padsize = padsize;
- av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
- s->packet_size, asf->packet_padsize, asf->packet_size_left);
- return 0;
-}
-
-/**
- *
- * @return <0 if error
- */
-static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
-{
- ASFContext *asf = s->priv_data;
- int rsize = 1;
- int num = avio_r8(pb);
- int64_t ts0;
-
- asf->packet_segments--;
- asf->packet_key_frame = num >> 7;
- asf->stream_index = asf->asfid2avid[num & 0x7f];
- // sequence should be ignored!
- DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
- DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
- DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
- av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
- asf->packet_key_frame, asf->stream_index, asf->packet_seq,
- asf->packet_frag_offset, asf->packet_replic_size);
- if (asf->packet_replic_size >= 8) {
- asf->packet_obj_size = avio_rl32(pb);
- if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) {
- av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
- return -1;
- }
- asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
- if (asf->packet_replic_size >= 8 + 38 + 4) {
- avio_skip(pb, 10);
- ts0 = avio_rl64(pb);
- avio_skip(pb, 8);
- avio_skip(pb, 12);
- avio_rl32(pb);
- avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
- if (ts0 != -1)
- asf->packet_frag_timestamp = ts0 / 10000;
- else
- asf->packet_frag_timestamp = AV_NOPTS_VALUE;
- } else
- avio_skip(pb, asf->packet_replic_size - 8);
- rsize += asf->packet_replic_size; // FIXME - check validity
- } else if (asf->packet_replic_size == 1) {
- // multipacket - frag_offset is beginning timestamp
- asf->packet_time_start = asf->packet_frag_offset;
- asf->packet_frag_offset = 0;
- asf->packet_frag_timestamp = asf->packet_timestamp;
-
- asf->packet_time_delta = avio_r8(pb);
- rsize++;
- } else if (asf->packet_replic_size != 0) {
- av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
- asf->packet_replic_size);
- return -1;
- }
- if (asf->packet_flags & 0x01) {
- DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0
is illegal
- if (rsize > asf->packet_size_left) {
- av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
- return -1;
- } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
- if (asf->packet_frag_size > asf->packet_size_left - rsize +
asf->packet_padsize) {
- av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid
(%d-%d)\n",
- asf->packet_size_left, rsize);
- return -1;
- } else {
- int diff = asf->packet_frag_size - (asf->packet_size_left -
rsize);
- asf->packet_size_left += diff;
- asf->packet_padsize -= diff;
- }
- }
- } else {
- if (rsize > asf->packet_size_left) {
- av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
- return -1;
- }
- asf->packet_frag_size = asf->packet_size_left - rsize;
- }
- if (asf->packet_replic_size == 1) {
- asf->packet_multi_size = asf->packet_frag_size;
- if (asf->packet_multi_size > asf->packet_size_left)
- return -1;
- }
- asf->packet_size_left -= rsize;
-
- return 0;
-}
-
-/**
- * Parse data from individual ASF packets (which were previously loaded
- * with asf_get_packet()).
- * @param s demux context
- * @param pb context to read data from
- * @param pkt pointer to store packet data into
- * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
- * packets need to be loaded (through asf_get_packet())
- */
-static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
-{
- ASFContext *asf = s->priv_data;
- ASFStream *asf_st = 0;
- for (;;) {
- int ret;
-
- if (pb->eof_reached)
- return AVERROR_EOF;
-
- if (asf->packet_size_left < FRAME_HEADER_SIZE ||
- asf->packet_segments < 1) {
- int ret = asf->packet_size_left + asf->packet_padsize;
-
- assert(ret >= 0);
- /* fail safe */
- avio_skip(pb, ret);
-
- asf->packet_pos = avio_tell(pb);
- if (asf->data_object_size != (uint64_t)-1 &&
- (asf->packet_pos - asf->data_object_offset >=
asf->data_object_size))
- return AVERROR_EOF; /* Do not exceed the size of the data
object */
- return 1;
- }
- if (asf->packet_time_start == 0) {
- if (asf_read_frame_header(s, pb) < 0) {
- asf->packet_segments = 0;
- continue;
- }
- if (asf->stream_index < 0 ||
- s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
- (!asf->packet_key_frame &&
- s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
- asf->packet_time_start = 0;
- /* unhandled packet (should not happen) */
- avio_skip(pb, asf->packet_frag_size);
- asf->packet_size_left -= asf->packet_frag_size;
- if (asf->stream_index < 0)
- av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown
stream)\n",
- asf->packet_frag_size);
- continue;
- }
- asf->asf_st = s->streams[asf->stream_index]->priv_data;
- }
- asf_st = asf->asf_st;
- av_assert0(asf_st);
-
- if (!asf_st->frag_offset && asf->packet_frag_offset) {
- av_dlog(s, "skipping asf data pkt with fragment offset for "
- "stream:%d, expected:%d but got %d from pkt)\n",
- asf->stream_index, asf_st->frag_offset,
- asf->packet_frag_offset);
- avio_skip(pb, asf->packet_frag_size);
- asf->packet_size_left -= asf->packet_frag_size;
- continue;
- }
-
- if (asf->packet_replic_size == 1) {
- // frag_offset is here used as the beginning timestamp
- asf->packet_frag_timestamp = asf->packet_time_start;
- asf->packet_time_start += asf->packet_time_delta;
- asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
- asf->packet_size_left--;
- asf->packet_multi_size--;
- if (asf->packet_multi_size < asf->packet_obj_size) {
- asf->packet_time_start = 0;
- avio_skip(pb, asf->packet_multi_size);
- asf->packet_size_left -= asf->packet_multi_size;
- continue;
- }
- asf->packet_multi_size -= asf->packet_obj_size;
- }
- if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
- asf_st->frag_offset + asf->packet_frag_size >
asf->packet_obj_size) {
- av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d
%d)\n",
- asf_st->frag_offset, asf->packet_frag_size,
- asf->packet_obj_size, asf_st->pkt.size);
- asf->packet_obj_size = asf_st->pkt.size;
- }
-
- if (asf_st->pkt.size != asf->packet_obj_size ||
- // FIXME is this condition sufficient?
- asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
- if (asf_st->pkt.data) {
- av_log(s, AV_LOG_INFO,
- "freeing incomplete packet size %d, new %d\n",
- asf_st->pkt.size, asf->packet_obj_size);
- asf_st->frag_offset = 0;
- av_free_packet(&asf_st->pkt);
- }
- /* new packet */
- av_new_packet(&asf_st->pkt, asf->packet_obj_size);
- asf_st->seq = asf->packet_seq;
- asf_st->pkt.dts = asf->packet_frag_timestamp -
asf->hdr.preroll;
- asf_st->pkt.stream_index = asf->stream_index;
- asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
-
- if (asf_st->pkt.data && asf_st->palette_changed) {
- uint8_t *pal;
- pal = av_packet_new_side_data(&asf_st->pkt,
AV_PKT_DATA_PALETTE,
- AVPALETTE_SIZE);
- if (!pal) {
- av_log(s, AV_LOG_ERROR, "Cannot append palette to
packet\n");
- } else {
- memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
- asf_st->palette_changed = 0;
- }
- }
- av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d
size:%d\n",
- asf->stream_index, asf->packet_key_frame,
- asf_st->pkt.flags & AV_PKT_FLAG_KEY,
- s->streams[asf->stream_index]->codec->codec_type ==
AVMEDIA_TYPE_AUDIO,
- asf->packet_obj_size);
- if (s->streams[asf->stream_index]->codec->codec_type ==
AVMEDIA_TYPE_AUDIO)
- asf->packet_key_frame = 1;
- if (asf->packet_key_frame)
- asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
- }
-
- /* read data */
- av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
- s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
- asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
- asf->packet_size_left -= asf->packet_frag_size;
- if (asf->packet_size_left < 0)
- continue;
-
- if (asf->packet_frag_offset >= asf_st->pkt.size ||
- asf->packet_frag_size > asf_st->pkt.size -
asf->packet_frag_offset) {
- av_log(s, AV_LOG_ERROR,
- "packet fragment position invalid %u,%u not in %u\n",
- asf->packet_frag_offset, asf->packet_frag_size,
- asf_st->pkt.size);
- continue;
- }
-
- ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
- asf->packet_frag_size);
- if (ret != asf->packet_frag_size) {
- if (ret < 0 || asf->packet_frag_offset + ret == 0)
- return ret < 0 ? ret : AVERROR_EOF;
-
- if (asf_st->ds_span > 1) {
- // scrambling, we can either drop it completely or fill the
remainder
- // TODO: should we fill the whole packet instead of just the
current
- // fragment?
- memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
- asf->packet_frag_size - ret);
- ret = asf->packet_frag_size;
- } else {
- // no scrambling, so we can return partial packets
- av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
- }
- }
- if (s->key && s->keylen == 20)
- ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
- ret);
- asf_st->frag_offset += ret;
- /* test if whole packet is read */
- if (asf_st->frag_offset == asf_st->pkt.size) {
- // workaround for macroshit radio DVR-MS files
- if (s->streams[asf->stream_index]->codec->codec_id ==
AV_CODEC_ID_MPEG2VIDEO &&
- asf_st->pkt.size > 100) {
- int i;
- for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
- ;
- if (i == asf_st->pkt.size) {
- av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
- asf_st->frag_offset = 0;
- av_free_packet(&asf_st->pkt);
- continue;
- }
- }
-
- /* return packet */
- if (asf_st->ds_span > 1) {
- if (asf_st->pkt.size != asf_st->ds_packet_size *
asf_st->ds_span) {
- av_log(s, AV_LOG_ERROR,
- "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
- asf_st->pkt.size, asf_st->ds_packet_size,
- asf_st->ds_span);
- } else {
- /* packet descrambling */
- AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
-
FF_INPUT_BUFFER_PADDING_SIZE);
- if (buf) {
- uint8_t *newdata = buf->data;
- int offset = 0;
- memset(newdata + asf_st->pkt.size, 0,
- FF_INPUT_BUFFER_PADDING_SIZE);
- while (offset < asf_st->pkt.size) {
- int off = offset / asf_st->ds_chunk_size;
- int row = off / asf_st->ds_span;
- int col = off % asf_st->ds_span;
- int idx = row + col * asf_st->ds_packet_size /
asf_st->ds_chunk_size;
- assert(offset + asf_st->ds_chunk_size <=
asf_st->pkt.size);
- assert(idx + 1 <= asf_st->pkt.size /
asf_st->ds_chunk_size);
- memcpy(newdata + offset,
- asf_st->pkt.data + idx *
asf_st->ds_chunk_size,
- asf_st->ds_chunk_size);
- offset += asf_st->ds_chunk_size;
- }
- av_buffer_unref(&asf_st->pkt.buf);
- asf_st->pkt.buf = buf;
- asf_st->pkt.data = buf->data;
- }
- }
- }
- asf_st->frag_offset = 0;
- *pkt = asf_st->pkt;
-#if FF_API_DESTRUCT_PACKET
-FF_DISABLE_DEPRECATION_WARNINGS
- asf_st->pkt.destruct = NULL;
-FF_ENABLE_DEPRECATION_WARNINGS
-#endif
- asf_st->pkt.buf = 0;
- asf_st->pkt.size = 0;
- asf_st->pkt.data = 0;
- asf_st->pkt.side_data_elems = 0;
- asf_st->pkt.side_data = NULL;
- break; // packet completed
- }
- }
- return 0;
-}
-
-static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- ASFContext *asf = s->priv_data;
-
- for (;;) {
- int ret;
-
- /* parse cached packets, if any */
- if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
- return ret;
- if ((ret = asf_get_packet(s, s->pb)) < 0)
- assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
- asf->packet_segments < 1);
- asf->packet_time_start = 0;
- }
-}
-
-// Added to support seeking after packets have been read
-// If information is not reset, read_packet fails due to
-// leftover information from previous reads
-static void asf_reset_header(AVFormatContext *s)
-{
- ASFContext *asf = s->priv_data;
- ASFStream *asf_st;
- int i;
-
- asf->packet_size_left = 0;
- asf->packet_segments = 0;
- asf->packet_flags = 0;
- asf->packet_property = 0;
- asf->packet_timestamp = 0;
- asf->packet_segsizetype = 0;
- asf->packet_segments = 0;
- asf->packet_seq = 0;
- asf->packet_replic_size = 0;
- asf->packet_key_frame = 0;
- asf->packet_padsize = 0;
- asf->packet_frag_offset = 0;
- asf->packet_frag_size = 0;
- asf->packet_frag_timestamp = 0;
- asf->packet_multi_size = 0;
- asf->packet_obj_size = 0;
- asf->packet_time_delta = 0;
- asf->packet_time_start = 0;
-
- for (i = 0; i < s->nb_streams; i++) {
- asf_st = s->streams[i]->priv_data;
- if (!asf_st)
- continue;
- av_free_packet(&asf_st->pkt);
- asf_st->frag_offset = 0;
- asf_st->seq = 0;
- }
- asf->asf_st = NULL;
-}
-
-static int asf_read_close(AVFormatContext *s)
-{
- asf_reset_header(s);
-
- return 0;
-}
-
-static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
- int64_t *ppos, int64_t pos_limit)
-{
- AVPacket pkt1, *pkt = &pkt1;
- ASFStream *asf_st;
- int64_t pts;
- int64_t pos = *ppos;
- int i;
- int64_t start_pos[ASF_MAX_STREAMS];
-
- for (i = 0; i < s->nb_streams; i++)
- start_pos[i] = pos;
-
- if (s->packet_size > 0)
- pos = (pos + s->packet_size - 1 - s->data_offset) /
- s->packet_size * s->packet_size +
- s->data_offset;
- *ppos = pos;
- avio_seek(s->pb, pos, SEEK_SET);
-
- asf_reset_header(s);
- for (;;) {
- if (asf_read_packet(s, pkt) < 0) {
- av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
- return AV_NOPTS_VALUE;
- }
-
- pts = pkt->dts;
-
- av_free_packet(pkt);
- if (pkt->flags & AV_PKT_FLAG_KEY) {
- i = pkt->stream_index;
-
- asf_st = s->streams[i]->priv_data;
- av_assert0(asf_st);
-
-// assert((asf_st->packet_pos - s->data_offset) % s->packet_size ==
0);
- pos = asf_st->packet_pos;
-
- av_add_index_entry(s->streams[i], pos, pts, pkt->size,
- pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
- start_pos[i] = asf_st->packet_pos + 1;
-
- if (pkt->stream_index == stream_index)
- break;
- }
- }
-
- *ppos = pos;
- return pts;
-}
-
-static int asf_build_simple_index(AVFormatContext *s, int stream_index)
-{
- ff_asf_guid g;
- ASFContext *asf = s->priv_data;
- int64_t current_pos = avio_tell(s->pb);
- int i, ret = 0;
-
- avio_seek(s->pb, asf->data_object_offset + asf->data_object_size,
SEEK_SET);
- if ((ret = ff_get_guid(s->pb, &g)) < 0)
- goto end;
-
- /* the data object can be followed by other top-level objects,
- * skip them until the simple index object is reached */
- while (ff_guidcmp(&g, &index_guid)) {
- int64_t gsize = avio_rl64(s->pb);
- if (gsize < 24 || s->pb->eof_reached) {
- goto end;
- }
- avio_skip(s->pb, gsize - 24);
- if ((ret = ff_get_guid(s->pb, &g)) < 0)
- goto end;
- }
-
- {
- int64_t itime, last_pos = -1;
- int pct, ict;
- int64_t av_unused gsize = avio_rl64(s->pb);
- if ((ret = ff_get_guid(s->pb, &g)) < 0)
- goto end;
- itime = avio_rl64(s->pb);
- pct = avio_rl32(s->pb);
- ict = avio_rl32(s->pb);
- av_log(s, AV_LOG_DEBUG,
- "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
-
- for (i = 0; i < ict; i++) {
- int pktnum = avio_rl32(s->pb);
- int pktct = avio_rl16(s->pb);
- int64_t pos = s->data_offset + s->packet_size *
(int64_t)pktnum;
- int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) -
asf->hdr.preroll, 0);
-
- if (pos != last_pos) {
- av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts:
%"PRId64"\n",
- pktnum, pktct, index_pts);
- av_add_index_entry(s->streams[stream_index], pos, index_pts,
- s->packet_size, 0, AVINDEX_KEYFRAME);
- last_pos = pos;
- }
- }
- asf->index_read = ict > 0;
- }
-end:
- if (s->pb->eof_reached)
- ret = 0;
- avio_seek(s->pb, current_pos, SEEK_SET);
- return ret;
-}
-
-static int asf_read_seek(AVFormatContext *s, int stream_index,
- int64_t pts, int flags)
-{
- ASFContext *asf = s->priv_data;
- AVStream *st = s->streams[stream_index];
- int64_t pos;
- int index, ret = 0;
-
- if (s->packet_size <= 0)
- return -1;
-
- /* Try using the protocol's read_seek if available */
- if (s->pb) {
- int ret = avio_seek_time(s->pb, stream_index, pts, flags);
- if (ret >= 0)
- asf_reset_header(s);
- if (ret != AVERROR(ENOSYS))
- return ret;
- }
-
- /* explicitly handle the case of seeking to 0 */
- if (!pts) {
- asf_reset_header(s);
- avio_seek(s->pb, s->data_offset, SEEK_SET);
- return 0;
- }
-
- if (!asf->index_read)
- ret = asf_build_simple_index(s, stream_index);
-
- if (!ret && asf->index_read && st->index_entries) {
- index = av_index_search_timestamp(st, pts, flags);
- if (index >= 0) {
- /* find the position */
- pos = st->index_entries[index].pos;
-
- /* do the seek */
- av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
- avio_seek(s->pb, pos, SEEK_SET);
- asf_reset_header(s);
- return 0;
- }
- }
- /* no index or seeking by index failed */
- if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
- return -1;
- asf_reset_header(s);
- return 0;
-}
-
-AVInputFormat ff_asf_demuxer = {
- .name = "asf",
- .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming
Format)"),
- .priv_data_size = sizeof(ASFContext),
- .read_probe = asf_probe,
- .read_header = asf_read_header,
- .read_packet = asf_read_packet,
- .read_close = asf_read_close,
- .read_seek = asf_read_seek,
- .read_timestamp = asf_read_pts,
- .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
- .priv_class = &asf_class,
-};
diff --git a/libavformat/asfdec2.c b/libavformat/asfdec2.c
new file mode 100644
index 0000000..7793cfa
--- /dev/null
+++ b/libavformat/asfdec2.c
@@ -0,0 +1,1425 @@
+/*
+ * Microsoft Advanced Stream Format demuxer
+ * Copyright (c) 2014 Alexandra Hájková
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bswap.h"
+#include "libavutil/common.h"
+#include "libavutil/dict.h"
+#include "libavutil/internal.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "avformat.h"
+#include "avio_internal.h"
+#include "avlanguage.h"
+#include "id3v2.h"
+#include "internal.h"
+#include "riff.h"
+#include "asf.h"
+#include "asfcrypt.h"
+
+#define BMP_HEADER_SIZE 40
+#define ASF_TYPE_AUDIO 0x2
+#define ASF_TYPE_VIDEO 0x1
+#define ASF_STREAM_NUM 0x7F
+#define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
+#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
+#define ASF_NUM_OF_PAYLOADS 0x3F
+#define ASF_UNICODE 0x0
+#define ASF_BYTE_ARRAY 0x1
+#define ASF_BOOL 0x2
+#define ASF_DWORD 0x3
+#define ASF_QWORD 0x4
+#define ASF_WORD 0x5
+
+typedef struct GUIDParseTable {
+ const char *name;
+ ff_asf_guid guid;
+ int (*read_object)(AVFormatContext *, struct GUIDParseTable *);
+ int is_subobject;
+} GUIDParseTable;
+
+typedef struct StreamBitrate {
+ uint8_t stream_num;
+ uint32_t avg_bitrate;
+} StreamBitrate;
+
+typedef struct ASFPacket {
+ AVPacket *avpkt;
+ int64_t dts;
+ uint32_t frame_num; // ASF payloads with the same number are parts of the
same frame
+ int flags;
+ int data_size;
+ int duration;
+ int size_left;
+ uint8_t stream_index;
+} ASFPacket;
+
+typedef struct ASFStreamDemux {
+ uint8_t stream_index; //from packet header
+ int index; // stream index in AVFormatContext, set in
read_stream_properties
+ int type;
+ int8_t span; // for deinterleaving
+ int16_t virtual_pkt_len;
+ int16_t virtual_chunk_len;
+ int16_t idx_type; // index type in the Index Parameters Object
+ ASFPacket *pkt;
+ StreamBitrate *sb;
+} ASFStreamDemux;
+
+typedef struct {
+ int data_reached;
+ int seekable;
+ int nb_streams;
+ int stream_index; //from packet header, for the subpayload case
+ int is_simple_index; // is simple index present or not 1/0
+ int64_t offset; // offset of the current object
+ int64_t data_offset;
+ int64_t header_obj_size;
+ int64_t first_packet_offset; // packet offset
+ int return_subpayload;
+ uint64_t sub_header_offset; // offset of subplayload header
+ int64_t packet_offset; // offset of the current packet inside Data Object
+ uint32_t pad_len; // padding after payload
+ uint64_t preroll;
+ uint32_t rep_len;
+ int64_t sub_dts;
+ uint8_t dts_delta; // for subpayloads
+ uint16_t mult_sub_len; // total length of subpayloads array inside
multiple payload
+ int nb_sub; // subpayloads get from current ASF packet
+ int64_t dts;
+ uint32_t b_flags; // flags with broadcast flag
+ uint32_t prop_flags; // file properties object flags
+ uint64_t nb_packets; // ASF packets
+ uint64_t nb_packets_left; // ASF packets, not AVPackets
+ uint64_t nb_mult_left; // multiple payloads left
+ int64_t unknown_offset; // for top level header objects or subobjects
whithout specified behavior
+ int64_t unknown_size;
+ int is_header;
+ uint64_t sub_left; // subpayloads left or not
+ uint32_t packet_size;
+ uint32_t packet_size_internal; // packet size stored inside ASFPacket, can
be 0
+ int64_t send_time;
+ int duration;
+ uint64_t data_size; // data object size
+ // presentation time offset, equal for all streams, should be equal to
send time, !100-nanosecond units
+ uint64_t time_offset;
+ // ASF file must not contain more than 128 streams according to the
specification
+ ASFStreamDemux *asf_st[128];
+ enum {
+ PARSE_PACKET_HEADER,
+ READ_SINGLE,
+ READ_SUB,
+ READ_MULTI,
+ READ_MULTI_SUB
+ } state;
+} ASFContext;
+
+static int detect_unknown_subobject(AVFormatContext *s, int64_t offset,
int64_t size);
+static GUIDParseTable *find_guid(ff_asf_guid guid);
+
+static int asf_probe(AVProbeData *pd)
+{
+ /* check file header */
+ if (!ff_guidcmp(pd->buf, &ff_asf_header))
+ return AVPROBE_SCORE_MAX;
+ else
+ return 0;
+}
+
+static void swap_guid(ff_asf_guid guid)
+{
+ FFSWAP(unsigned char, guid[0], guid[3]);
+ FFSWAP(unsigned char, guid[1], guid[2]);
+ FFSWAP(unsigned char, guid[4], guid[5]);
+ FFSWAP(unsigned char, guid[6], guid[7]);
+}
+
+static void check_position(AVIOContext *pb, int64_t offset, uint64_t size)
+{
+ if (avio_tell(pb) != offset + size)
+ avio_seek(pb, offset + size, SEEK_SET);
+}
+
+static uint64_t read_obj_size(AVIOContext *pb)
+{
+ return avio_rl64(pb);
+}
+
+static int read_unknown(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint64_t size = read_obj_size(pb);
+ int ret;
+
+ if (asf->is_header)
+ asf->unknown_size = size;
+ asf->is_header = 0;
+ if (!g->is_subobject) {
+ if (!(ret = strcmp(g->name, "Header Extension")))
+ avio_skip(pb, 22); // skip reserved fields and Data Size
+ if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
+ asf->unknown_size)) < 0)
+ return ret;
+ } else
+ avio_skip(pb, size - 24);
+
+ return 0;
+}
+
+// modified GET_STR16 from aviobuf
+static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
+{
+ char *q = buf;
+ int ret = 0;
+ if (buflen <= 0)
+ return AVERROR(EINVAL);
+ while (ret + 1 < maxlen) {
+ uint8_t tmp;
+ uint32_t ch;
+ GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
+ PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
+ }
+ *q = 0;
+
+ return ret;
+}
+
+static int read_marker(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint64_t size = read_obj_size(pb);
+ int i, nb_markers, len, ret;
+ char name[1024];
+
+ avio_rl64(pb);
+ avio_rl64(pb); // skip reserved GUID
+ nb_markers = avio_rl32(pb);
+ avio_rl16(pb); // skip reserved field
+ len = avio_rl16(pb);
+ for (i = 0; i < len; i++)
+ avio_r8(pb);
+
+ for (i = 0; i < nb_markers; i++) {
+ int64_t pts;
+
+ avio_rl64(pb);
+ pts = avio_rl64(pb);
+ pts -= asf->preroll * 10000;
+ avio_rl16(pb); // entry length
+ avio_rl32(pb); // send time
+ avio_rl32(pb); // flags
+ len = avio_rl32(pb);
+
+ if ((ret = avio_get_str16le(pb, len * 2, name,
+ sizeof(name))) < len)
+ avio_skip(pb, len - ret);
+ avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
+ AV_NOPTS_VALUE, name);
+ }
+ check_position(pb, asf->offset, size);
+
+ return 0;
+}
+
+static int read_metadata(AVFormatContext *s, const char *title, uint16_t len,
+ unsigned char *ch, uint16_t max_len)
+{
+ AVIOContext *pb = s->pb;
+
+ memset(ch, 0, max_len);
+ avio_get_str16le(pb, len * sizeof(*ch), ch, len * sizeof(*ch));
+ av_dict_set(&s->metadata, title, ch, 0);
+
+ return 0;
+}
+
+static int read_value(AVFormatContext *s, int8_t *name,
+ int16_t val_len, int type)
+{
+ AVIOContext *pb = s->pb;
+ uint8_t *value;
+ int ret;
+
+ value = av_malloc(2 * val_len);
+ if (!value)
+ return AVERROR(ENOMEM);
+ if (type == ASF_UNICODE) {
+ // get_asf_string reads UTF-16 and converts it to UTF-8 which needs
longer buffer
+ get_asf_string(pb, val_len, value, 2 * val_len);
+ av_dict_set(&s->metadata, name, value, 0);
+ } else {
+ char buf[32];
+ if ((ret = avio_read(pb, value, val_len)) < 0)
+ return ret;
+ snprintf(buf, sizeof(buf), "%s", value);
+ av_dict_set(&s->metadata, name, buf, 0);
+ }
+ av_free(value);
+
+ return 0;
+}
+
+static void read_generic_value(AVFormatContext *s, int8_t *name, int type)
+{
+ AVIOContext *pb = s->pb;
+ uint64_t value;
+ char buf[32];
+
+ switch (type) {
+ case ASF_BOOL:
+ value = avio_rl32(pb);
+ break;
+ case ASF_DWORD:
+ value = avio_rl32(pb);
+ break;
+ case ASF_QWORD:
+ value = avio_rl64(pb);
+ break;
+ case ASF_WORD:
+ value = avio_rl16(pb);
+ break;
+ }
+ snprintf(buf, sizeof(buf), "%"PRIu64"", value);
+ av_dict_set(&s->metadata, name, buf, 0);
+}
+
+static int read_ext_content(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint64_t size = read_obj_size(pb);
+ int16_t nb_desc = avio_rl16(pb);
+ int i;
+
+ for (i = 0; i < nb_desc; i++) {
+ int16_t name_len, type, val_len;
+ char *name = NULL;
+
+ name_len = avio_rl16(pb);
+ if (name_len) {
+ name = av_malloc(name_len);
+ if (!name)
+ return AVERROR(ENOMEM);
+ avio_get_str16le(pb, name_len * sizeof(*name), name,
+ name_len);
+ }
+ type = avio_rl16(pb);
+ val_len = avio_rl16(pb);
+ if (val_len) {
+ switch (type) {
+ case ASF_UNICODE:
+ read_value(s, name, val_len, type);
+ break;
+ case ASF_BYTE_ARRAY:
+ read_value(s, name, val_len, type);
+ break;
+ default:
+ read_generic_value(s, name, type);
+ break;
+ }
+ }
+ av_free(name);
+ }
+ check_position(pb, asf->offset, size);
+
+ return 0;
+}
+
+static int read_content(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int i;
+ uint16_t len[5], max_len = 0;
+ const char *titles[] = { "Title", "Author", "Copyright", "Description",
"Rate" };
+ int8_t *ch;
+ uint64_t size = read_obj_size(pb);
+
+ for (i = 0; i < 5; i++) {
+ len[i] = avio_rl16(pb);
+ max_len = FFMAX(max_len, len[i]);
+ }
+ ch = av_malloc(max_len * sizeof(*ch));
+ if (!ch)
+ return(AVERROR(ENOMEM));
+ for (i = 0; i < 5; i++)
+ read_metadata(s, titles[i], len[i], ch, max_len);
+ av_free(ch);
+ check_position(pb, asf->offset, size);
+
+ return 0;
+}
+
+static int read_properties(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint64_t nb_packets;
+ uint32_t max_packet_size;
+
+ read_obj_size(pb);
+ avio_skip(pb, 16); // skip File ID
+ avio_skip(pb, 8); // skip File size
+ avio_skip(pb, 8); // skip creation date
+ nb_packets = avio_rl64(pb);
+ asf->duration = avio_rl64(pb) / 10000; // stream duration
+ avio_skip(pb, 8); //skip send duration
+ asf->preroll = avio_rl64(pb);
+ asf->b_flags = avio_rl32(pb);
+ avio_skip(pb, 4); // skip minimal packet size
+ max_packet_size = avio_rl32(pb);
+ avio_skip(pb, 4); //skip max_bitrate
+ asf->nb_packets = nb_packets;
+ asf->packet_size = max_packet_size;
+
+ return 0;
+}
+
+static int parse_video_info(AVIOContext *pb, AVStream *st)
+{
+ uint16_t size;
+ unsigned int tag;
+
+ st->codec->width = avio_rl32(pb);
+ st->codec->height = avio_rl32(pb);
+ avio_skip(pb, 1); // skip reserved flags
+ size = avio_rl16(pb); // size of the Format Data
+ tag = ff_get_bmp_header(pb, st);
+ st->codec->codec_tag = tag;
+ st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
+
+ if (size > BMP_HEADER_SIZE) {
+ int ret;
+ st->codec->extradata_size = size - BMP_HEADER_SIZE;
+ if (!(st->codec->extradata = av_malloc(st->codec->extradata_size)))
+ return AVERROR(ENOMEM);
+ if ((ret = avio_read(pb, st->codec->extradata,
st->codec->extradata_size)) < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static int read_stream_properties(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint64_t size;
+ uint32_t err_data_len, ts_data_len; // time specific data length
+ uint16_t flags;
+ int8_t *ts_data;
+ ff_asf_guid stream_type;
+ enum AVMediaType type;
+ int ret;
+ int8_t span;
+ AVStream *st = avformat_new_stream(s, NULL);
+
+ // ASF file must not contain more than 128 streams according to the
specification
+ if (asf->nb_streams >= 128)
+ return AVERROR_INVALIDDATA;
+
+ if (!st)
+ return AVERROR(ENOMEM);
+ avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in
milliseconds
+ size = read_obj_size(pb);
+ ff_get_guid(pb, &stream_type);
+ if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
+ type = AVMEDIA_TYPE_AUDIO;
+ else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
+ type = AVMEDIA_TYPE_VIDEO;
+ else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media)) {
+ type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = AV_CODEC_ID_MJPEG;
+ } else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
+ type = AVMEDIA_TYPE_DATA;
+ else if (!ff_guidcmp(&stream_type,
+ &ff_asf_ext_stream_embed_stream_header)) {
+ type = AVMEDIA_TYPE_UNKNOWN;
+ } else
+ return AVERROR_INVALIDDATA;
+ st->codec->codec_type = type;
+ ff_get_guid(pb, &stream_type); // error correction type
+ asf->time_offset = avio_rl64(pb);
+ ts_data_len = avio_rl32(pb);
+ err_data_len = avio_rl32(pb);
+ flags = avio_rl16(pb); // bit 15 - Encrypted Content
+ if (!(asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(ASFStreamDemux))))
+ return AVERROR(ENOMEM);
+ asf->asf_st[asf->nb_streams]->stream_index = flags & ASF_STREAM_NUM;
+ asf->asf_st[asf->nb_streams]->index = st->index;
+ st->id = flags & ASF_STREAM_NUM;
+ if (!(asf->asf_st[asf->nb_streams]->pkt =
av_mallocz(sizeof(ASFPacket))))
+ return AVERROR(ENOMEM);
+ if (!(asf->asf_st[asf->nb_streams]->pkt->avpkt =
av_mallocz(sizeof(AVPacket))))
+ return AVERROR(ENOMEM);
+ if (!(asf->asf_st[asf->nb_streams]->sb =
av_mallocz(sizeof(StreamBitrate))))
+ return AVERROR(ENOMEM);
+ av_init_packet(asf->asf_st[asf->nb_streams]->pkt->avpkt);
+ asf->asf_st[asf->nb_streams]->pkt->data_size = 0;
+
+ avio_skip(pb, 4); // skip reserved field
+ if (ts_data_len) {
+ ts_data = av_malloc(ts_data_len);
+ if (!ts_data)
+ return AVERROR(ENOMEM);
+ switch (type) {
+ case AVMEDIA_TYPE_AUDIO:
+ asf->asf_st[asf->nb_streams]->type = AVMEDIA_TYPE_AUDIO;
+ ret = ff_get_wav_header(pb, st->codec, ts_data_len);
+ if (ret < 0) {
+ av_free(ts_data);
+ return ret;
+ }
+ break;
+ case AVMEDIA_TYPE_VIDEO:
+ asf->asf_st[asf->nb_streams]->type = AVMEDIA_TYPE_VIDEO;
+ ret = parse_video_info(pb, st);
+ if (ret < 0) {
+ av_free(ts_data);
+ return ret;
+ }
+ break;
+ default:
+ if ((ret = avio_read(pb, ts_data, ts_data_len)) < 0) {
+ av_free(ts_data);
+ return ret;
+ }
+ break;
+ }
+ av_free(ts_data);
+ } else
+ av_log(s, AV_LOG_WARNING, "Suspicious data found! Stream will be
ignored.\n");
+ if (err_data_len) {
+ if (type == AVMEDIA_TYPE_AUDIO) {
+ span = avio_r8(pb);
+ if (span > 1) {
+ asf->asf_st[asf->nb_streams]->span = span;
+ asf->asf_st[asf->nb_streams]->virtual_pkt_len =
avio_rl16(pb);
+ asf->asf_st[asf->nb_streams]->virtual_chunk_len =
avio_rl16(pb);
+ avio_skip(pb, err_data_len - 5);
+ } else
+ avio_skip(pb, err_data_len);
+ } else
+ avio_skip(pb, err_data_len);
+ }
+ asf->nb_streams++;
+ check_position(pb, asf->offset, size);
+
+ return 0;
+}
+
+static int read_ext_stream_properties(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ ff_asf_guid guid;
+ uint64_t size = read_obj_size(pb);
+ int16_t st_name_count, nb_pay_exts;
+ int i, ret;
+
+ avio_skip(pb, 60);
+ st_name_count = avio_rl16(pb);
+ nb_pay_exts = avio_rl16(pb);
+ for (i = 0; i < st_name_count; i++) {
+ int16_t len;
+ avio_skip(pb, 2); // Language ID Index
+ len = avio_rl16(pb);
+ avio_skip(pb, len);
+ }
+ for (i = 0; i < nb_pay_exts; i++) {
+ int32_t len;
+ avio_skip(pb, 16); // Extension System ID
+ avio_skip(pb, 2); // Extension Data Size
+ len = avio_rl32(pb);
+ avio_skip(pb, len);
+ }
+ if ((ret = ff_get_guid(pb, &guid)) < 0)
+ return ret;
+ swap_guid(guid);
+ g = find_guid(guid);
+ if (g) {
+ if ((ret = g->read_object(s, g)) < 0)
+ return ret;
+ }
+
+ check_position(pb, asf->offset, size);
+ return 0;
+}
+
+static int read_stream_bitrate(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int i, j;
+ uint16_t flags;
+ uint8_t stream_num;
+ uint32_t avg_bitrate;
+ uint16_t bit_num; //number of bitrate records
+ uint64_t size = read_obj_size(pb);
+
+ bit_num = avio_rl16(pb); // number of records
+ for (i = 0; i < bit_num; i++) {
+ flags = avio_rl16(pb);
+ stream_num = flags & ASF_STREAM_NUM;
+ avg_bitrate = avio_rl32(pb);
+ for (j = 0; j < asf->nb_streams; j++) {
+ if (stream_num == asf->asf_st[j]->stream_index) {
+ asf->asf_st[j]->sb->stream_num = stream_num;
+ asf->asf_st[j]->sb->avg_bitrate = avg_bitrate;
+ }
+ }
+ }
+
+ check_position(pb, asf->offset, size);
+ return 0;
+}
+
+static int read_language_list(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int i;
+ uint64_t size = read_obj_size(pb);
+ int16_t nb_langs = avio_rl16(pb);
+
+ for (i = 0; i < nb_langs; i++) {
+ int8_t len, *name;
+ len = avio_r8(pb);
+ if (!len)
+ len = 6;
+ if (len) {
+ len *= 2; // len is number of unicode characters - 2 bytes for
each char
+ name = av_malloc(len);
+ if (!name) {
+ return AVERROR(ENOMEM);
+ }
+ get_asf_string(pb, len, name, len);
+ av_free(name);
+ }
+ }
+
+ check_position(pb, asf->offset, size);
+ return 0;
+}
+
+// returns data object offset when reading this object for the first time
+static int read_data(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int i;
+ uint64_t size = asf->data_size = read_obj_size(pb);
+
+ // skip data reading for now and read Index Object first, then return to it
+ if (!asf->data_reached && pb->seekable) {
+ asf->data_offset = asf->offset;
+ asf->data_reached = 1;
+ avio_skip(pb, 26);
+ asf->first_packet_offset = avio_tell(pb);
+ avio_skip(pb, size - 24 - 26);
+ return asf->offset;
+ }
+ if (!pb->seekable)
+ asf->seekable = 0;
+ for (i = 0; i < asf->nb_streams; i++)
+ s->streams[i]->duration = asf->duration;
+ asf->data_reached = 0;
+ asf->nb_packets_left = asf->nb_packets;
+ asf->nb_mult_left = 0;
+ asf->sub_left = 0;
+ asf->state = PARSE_PACKET_HEADER;
+ asf->return_subpayload = 0;
+ asf->packet_size_internal = 0;
+ avio_skip(pb, 16); // skip File ID
+ size = avio_rl64(pb); // Total Data Packets
+ if (size != asf->nb_packets)
+ av_log(s, AV_LOG_WARNING, "Number of Packets from File Properties
Object is not equal to Total Data packets value! num of packets %"PRIu64" total
num %"PRIu64".\n", size,
+ asf->nb_packets);
+ avio_skip(pb, 2); // skip reserved field
+
+ return 0;
+}
+
+static int read_parameters(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int16_t nb_idx_specs;
+ int i, j;
+ uint64_t size = read_obj_size(pb);
+
+ avio_skip(pb, 4);
+ nb_idx_specs = avio_rl16(pb);
+ for (i = 0; i < nb_idx_specs; i++) {
+ int16_t stream_index = avio_rl16(pb);
+ for (j = 0; j < asf->nb_streams; j++) {
+ if (asf->asf_st[j]->stream_index == stream_index)
+ asf->asf_st[j]-> idx_type = avio_rl16(pb);
+ else
+ avio_skip(pb, 2);
+ }
+ }
+
+ check_position(pb, asf->offset, size);
+ return 0;
+}
+
+static int read_simple_index(AVFormatContext *s, GUIDParseTable *g)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ AVStream *st = NULL;
+ int64_t interval; // index entry time interval in 100 ns units, usually
it's 1s
+ int32_t pkt_num, nb_entries, prev_pkt_num = -1;
+ int i;
+ uint64_t size = read_obj_size(pb);
+
+ for (i = 0; i < asf->nb_streams; i++) {
+ if (asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) {
+ st = s->streams[asf->asf_st[i]->index];
+ break;
+ }
+ }
+ if (!st) {
+ avio_skip(pb, size - 24); // if there's no video stream, skip index
object
+ return 0;
+ }
+ avio_skip(pb, 16); // skip File ID
+ interval = avio_rl64(pb);
+ avio_skip(pb, 4);
+ nb_entries = avio_rl32(pb);
+ for (i = 0; i < nb_entries; i++) {
+ pkt_num = avio_rl32(pb);
+ avio_skip(pb, 2);
+ if (prev_pkt_num != pkt_num) {
+ av_add_index_entry(st, asf->first_packet_offset + asf->packet_size
* pkt_num,
+ av_rescale(interval, i, 10000),
+ asf->packet_size, 0, AVINDEX_KEYFRAME);
+ prev_pkt_num = pkt_num;
+ }
+ }
+ asf->is_simple_index = 1;
+ check_position(pb, asf->offset, size);
+
+ return 0;
+}
+
+static GUIDParseTable gdef[] = {
+ {"Data", {0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E,
0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}, read_data, 1},
+ {"Simple Index", {0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1,
0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB}, read_simple_index,
1},
+ {"Content Description", {0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E,
0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}, read_content, 1},
+ {"Extended Content Description", {0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07,
0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50}, read_ext_content,
1},
+ {"Stream Bitrate Properties", {0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D,
0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2},
read_stream_bitrate, 1},
+ {"File Properties", {0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47,
0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}, read_properties,
1},
+ {"Header Extension", {0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E,
0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}, read_unknown, 0},
+ {"Stream Properties", {0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7,
0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65},
read_stream_properties, 1},
+ {"Codec List", {0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D,
0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6}, read_unknown, 1},
+ {"Marker", {0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51,
0x11, 0xCF, 0x8E,
+ 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}, read_marker, 1},
+ {"Script Command", {0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62,
0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6}, read_unknown, 1},
+ {"Language List", {0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0,
0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85},
read_language_list, 1},
+ {"Padding", {0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF,
0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8}, read_unknown, 1},
+ {"DRMv1 Header", {0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23,
0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E}, read_unknown, 1},
+ {"DRMv2 Header", {0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22,
0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c}, read_unknown, 1},
+ {"Index", {0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA,
0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE}, read_unknown, 1},
+ {"Media Object Index", {0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD,
0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C}, read_unknown, 1},
+ {"Timecode Index", {0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A,
0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C}, read_unknown, 0},
+ {"Bitrate_Mutual_Exclusion", {0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA,
0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE}, read_unknown, 1},
+ {"Error Correction", {0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E,
0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}, read_unknown, 1},
+ {"Content Branding", {0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23,
0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E}, read_unknown, 1},
+ {"Content Encryption", {0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23,
0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E}, read_unknown, 1},
+ {"Extended Content Encryption", {0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22,
0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C}, read_unknown, 1},
+ {"Digital Signature", {0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23,
0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E}, read_unknown, 1},
+ {"Extended Stream Properties", {0x14, 0xE6, 0xA5, 0xCB, 0xC6, 0x72,
0x43, 0x32, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A},
read_ext_stream_properties, 1},
+ {"Advanced Mutual Exclusion", {0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75,
0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD}, read_unknown, 1},
+ {"Group Mutual Exclusion", {0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79,
0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49}, read_unknown, 1},
+ {"Stream Prioritization", {0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3,
0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24}, read_unknown, 1},
+ {"Bandwidth Sharing Object", {0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B,
0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9}, read_unknown, 1},
+ {"Metadata", {0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF,
0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA}, read_unknown, 1},
+ {"Audio Spread", {0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F,
0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20}, read_unknown, 1},
+ {"Index Parameters", {0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA,
0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE}, read_parameters,
1},
+ {"Content Encryption System Windows Media DRM Network Devices",
+ {0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4,
0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D}, read_unknown, 1},
+ {"Mutex Language", {0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA,
0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE}, read_unknown, 1},
+ {"Mutex Bitrate", {0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA,
0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE}, read_unknown, 1},
+ {"Mutex Unknown", {0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA,
0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE}, read_unknown, 1},
+ {"Bandwith Sharing Exclusive", {0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97,
0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9}, read_unknown, 1},
+ {"Bandwith Sharing Partial", {0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97,
0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9}, read_unknown, 1},
+ {"Payload Extension System Timecode", {0x39, 0x95, 0x95, 0xEC, 0x86, 0x67,
0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E}, read_unknown, 1},
+ {"Payload Extension System File Name", {0xE1, 0x65, 0xEC, 0x0E, 0x19,
0xED, 0x45, 0xD7, 0xB4, 0xA7, 0x25, 0xCB, 0xD1, 0xE2, 0x8E, 0x9B},
read_unknown, 1},
+ {"Payload Extension System Content Type", {0xD5, 0x90, 0xDC, 0x20, 0x07,
0xBC, 0x43, 0x6C, 0x9C, 0xF7, 0xF3, 0xBB, 0xFB, 0xF1, 0xA4, 0xDC},
read_unknown, 1},
+ {"Payload Extension System Pixel Aspect Ratio", {0x1, 0x1E, 0xE5, 0x54,
0xF9, 0xEA, 0x4B, 0xC8, 0x82, 0x1A, 0x37, 0x6B, 0x74, 0xE4, 0xC4, 0xB8},
read_unknown, 1},
+ {"Payload Extension System Sample Duration", {0xC6, 0xBD, 0x94, 0x50,
0x86, 0x7F, 0x49, 0x07, 0x83, 0xA3, 0xC7, 0x79, 0x21, 0xB7, 0x33, 0xAD},
read_unknown, 1},
+ {"Payload Extension System Encryption Sample ID", {0x66, 0x98, 0xB8, 0x4E,
0x0A, 0xFA, 0x43, 0x30, 0xAE, 0xB2, 0x1C, 0x0A, 0x98, 0xD7, 0xA4, 0x4D},
read_unknown, 1},
+ {"Payload Extension System Degradable JPEG", {0x00, 0xE1, 0xAF, 0x06,
0x7B, 0xEC, 0x11, 0xD1, 0xA5, 0x82, 0x00, 0xC0, 0x4F, 0xC2, 0x9C, 0xFB},
read_unknown, 1},
+};
+
+#define read_length(flag, name, len) \
+ do { \
+ if ((flag) == name ## IS_BYTE) \
+ len = avio_r8(pb); \
+ else if ((flag) == name ## IS_WORD) \
+ len = avio_rl16(pb); \
+ else if ((flag) == name ## IS_DWORD)\
+ len = avio_rl32(pb); \
+ else \
+ len = 0; \
+ } while(0)
+
+static int read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint8_t sub_len;
+ int ret, i;
+
+ if (is_header) {
+ asf->dts_delta = avio_r8(pb);
+ if (asf->nb_mult_left) {
+ asf->mult_sub_len = avio_rl16(pb); // total
+ }
+ asf->sub_header_offset = avio_tell(pb);
+ asf->nb_sub = 0;
+ asf->sub_left = 1;
+ }
+ sub_len = avio_r8(pb);
+ if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is
entire frame
+ return ret;
+ for (i = 0; i < asf->nb_streams; i++) {
+ if (asf->stream_index == asf->asf_st[i]->stream_index) {
+ pkt->stream_index = asf->asf_st[i]->index;
+ break;
+ }
+ }
+ asf->return_subpayload = 1;
+ if (!sub_len)
+ asf->return_subpayload = 0;
+
+ if (sub_len)
+ asf->nb_sub++;
+ pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta -
asf->preroll;
+ if (asf->nb_mult_left && (avio_tell(pb) >= (asf->sub_header_offset +
asf->mult_sub_len))) {
+ asf->sub_left = 0;
+ asf->nb_mult_left--;
+ }
+ if (avio_tell(pb) >= (asf->packet_offset + asf->packet_size -
asf->pad_len)) {
+ asf->sub_left = 0;
+ if (!asf->nb_mult_left) {
+ avio_skip(pb, asf->pad_len);
+ asf->nb_packets_left--;
+ if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
+ av_log(s, AV_LOG_WARNING, "Position %"PRId64" wrong, should be
%"PRId64"\n",
+ avio_tell(pb), asf->packet_offset + asf->packet_size);
+ avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static void reset_packet(ASFPacket *asf_pkt)
+{
+ asf_pkt->size_left = 0;
+ asf_pkt->data_size = 0;
+ asf_pkt->duration = 0;
+ asf_pkt->flags = 0;
+ asf_pkt->dts = 0;
+ asf_pkt->duration = 0;
+ av_free_packet(asf_pkt->avpkt);
+ av_init_packet(asf_pkt->avpkt);
+}
+
+static int read_multiple_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket
*asf_pkt)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint16_t pay_len;
+ unsigned char *p;
+ int ret;
+ int skip = 0;
+
+ // if replicated lenght is 1, subpayloads are present
+ if (asf->rep_len == 1) {
+ asf->sub_left = 1;
+ asf->state = READ_MULTI_SUB;
+ pkt->flags = asf_pkt->flags;
+ if ((ret = read_subpayload(s, pkt, 1)) < 0)
+ return ret;
+ } else {
+ if (!asf_pkt->data_size) {
+ asf_pkt->data_size = asf_pkt->size_left = avio_rl32(pb); // read
media object size
+ if (asf_pkt->data_size <= 0)
+ return AVERROR_EOF;
+ if ((ret = av_new_packet(asf_pkt->avpkt, asf_pkt->data_size)) < 0)
+ return ret;
+ } else
+ avio_skip(pb, 4); // reading of media object size is already done
+ asf_pkt->dts = avio_rl32(pb); // read presentation time
+ if ((asf->rep_len - 8) > 0)
+ avio_skip(pb, asf->rep_len - 8); // skip replicated data
+ pay_len = avio_rl16(pb); // payload length should be WORD
+ if (pay_len > asf->packet_size) {
+ av_log(s, AV_LOG_ERROR, "Error: invalid data packet size, pay_len
%"PRIu16", asf->packet_size %"PRIu32", offset %"PRId64".\n",
+ pay_len, asf->packet_size, avio_tell(pb));
+ return AVERROR_INVALIDDATA;
+ }
+ p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
+ if ((p + pay_len) > (asf_pkt->avpkt->data + asf_pkt->data_size)) {
+ av_log(s, AV_LOG_ERROR, "Error: invalid buffer size, pay_len %d,
data size left %d.\n",
+ pay_len, asf_pkt->size_left);
+ skip = pay_len - asf_pkt->size_left;
+ pay_len = asf_pkt->size_left;
+ }
+ if ((ret = avio_read(pb, p, pay_len)) < 0)
+ return ret;
+ avio_skip(pb, skip);
+ asf_pkt->size_left -= pay_len;
+ asf->nb_mult_left--;
+ }
+
+ return 0;
+}
+
+static int read_single_payload(AVFormatContext *s, AVPacket *pkt, ASFPacket
*asf_pkt)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int64_t offset;
+ uint64_t size;
+ unsigned char *p;
+ int ret;
+
+ if (!asf_pkt->data_size) {
+ asf_pkt->data_size = asf_pkt->size_left = avio_rl32(pb); // read media
object size
+ if (asf_pkt->data_size <= 0)
+ return AVERROR_EOF;
+ if ((ret = av_new_packet(asf_pkt->avpkt, asf_pkt->data_size)) < 0)
+ return ret;
+ } else
+ avio_skip(pb, 4); // skip media object size
+ asf_pkt->dts = avio_rl32(pb); // read presentation time
+ if ((asf->rep_len - 8) > 0)
+ avio_skip(pb, asf->rep_len - 8); // skip replicated data
+ offset = avio_tell(pb);
+
+ // size of the payload - size of the packet without header and padding
+ if (asf->packet_size_internal)
+ size = asf->packet_size_internal - offset + asf->packet_offset -
asf->pad_len;
+ else
+ size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
+ if (size > asf->packet_size) {
+ av_log(s, AV_LOG_ERROR, "Error: invalid data packet size, offset
%"PRId64".\n",
+ avio_tell(pb));
+ return AVERROR_INVALIDDATA;
+ }
+ p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
+ if (asf_pkt->size_left > size)
+ asf_pkt->size_left -= size;
+ else
+ asf_pkt->size_left = 0;
+ if ((ret = avio_read(pb, p, size)) < 0)
+ return ret;
+ if (asf->packet_size_internal)
+ avio_skip(pb, asf->packet_size - asf->packet_size_internal);
+ avio_skip(pb, asf->pad_len); // skip padding
+
+ return 0;
+}
+
+static int read_payload(AVFormatContext *s, AVPacket *pkt)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint8_t stream_num;
+ uint32_t off_len, media_len;
+ int ret, i;
+ ASFPacket *asf_pkt = NULL;
+
+ if (!asf->sub_left) {
+ stream_num = avio_r8(pb);
+ asf->stream_index = stream_num & ASF_STREAM_NUM;
+ for (i = 0; i < asf->nb_streams; i++) {
+ if (asf->stream_index == asf->asf_st[i]->stream_index) {
+ asf_pkt = asf->asf_st[i]->pkt;
+ asf_pkt->stream_index = asf->asf_st[i]->index;
+ asf_pkt->dts = asf->dts;
+ break;
+ }
+ }
+ if (!asf_pkt)
+ return AVERROR_INVALIDDATA;
+ if (stream_num >> 7)
+ asf_pkt->flags |= AV_PKT_FLAG_KEY;
+ read_length(asf->prop_flags &
ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
+ ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
+ read_length(asf->prop_flags &
ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
+ ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_,
off_len);
+ read_length(asf->prop_flags &
ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
+ ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_len);
+ if (asf_pkt) {
+ if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
+ av_log(s, AV_LOG_WARNING, "Unfinished frame will be
ignored\n");
+ reset_packet(asf_pkt);
+ }
+ asf_pkt->frame_num = media_len;
+ }
+ asf->sub_dts = off_len;
+ if (asf->nb_mult_left) {
+ if ((ret = read_multiple_payload(s, pkt, asf_pkt)) < 0)
+ return ret;
+ } else if (asf->rep_len == 1) {
+ asf->sub_left = 1;
+ asf->state = READ_SUB;
+ pkt->flags = asf_pkt->flags;
+ if ((ret = read_subpayload(s, pkt, 1)) < 0)
+ return ret;
+ } else {
+ if ((ret = read_single_payload(s, pkt, asf_pkt)) < 0)
+ return ret;
+ }
+ } else {
+ for (i = 0; i <= asf->nb_streams; i++) {
+ if (asf->stream_index == asf->asf_st[i]->stream_index) {
+ asf_pkt = asf->asf_st[i]->pkt;
+ break;
+ }
+ }
+ if (!asf_pkt)
+ return AVERROR_INVALIDDATA;
+ pkt->flags = asf_pkt->flags;
+ pkt->dts = asf_pkt->dts;
+ pkt->stream_index = asf->asf_st[i]->index;
+ if ((ret = read_subpayload(s, pkt, 0)) < 0) // read subpayload without
its header
+ return ret;
+ }
+
+ return 0;
+}
+
+static int read_packet_header(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint64_t size;
+ uint32_t av_unused seq;
+ unsigned char error_flags, len_flags, pay_flags;
+
+ asf->packet_offset = avio_tell(pb);
+ error_flags = avio_r8(pb); // read Error Correction Flags
+ if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT)
+ if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
+ size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
+ avio_skip(pb, size);
+ }
+ len_flags = avio_r8(pb);
+ asf->prop_flags = avio_r8(pb);
+ read_length(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
+ ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
+ read_length(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
+ ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
+ read_length(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
+ ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
+ asf->send_time = avio_rl32(pb); // send time
+ avio_skip(pb, 2); // skip duration
+ if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple
Payloads present
+ pay_flags = avio_r8(pb);
+ asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
+ }
+
+ return 0;
+}
+
+static int do_deinterleaving(AVFormatContext *s, ASFPacket *asf_pkt, int i)
+{
+ ASFContext *asf = s->priv_data;
+ int pos = 0, j, l, ret;
+ unsigned char *p = asf_pkt->avpkt->data;
+ int16_t pkt_len = asf->asf_st[i]->virtual_pkt_len;
+ int16_t chunk_len = asf->asf_st[i]->virtual_chunk_len;
+ int nchunks = pkt_len/chunk_len;
+ AVPacket *buf = av_mallocz(sizeof(AVPacket));
+
+ if (!buf)
+ return AVERROR(ENOMEM);
+ if ((ret = av_new_packet(buf, asf_pkt->data_size)) < 0) {
+ av_free(buf);
+ return ret;
+ }
+ while (asf_pkt->data_size >= asf->asf_st[i]->span * pkt_len + pos) {
+ for (l = 0; l < pkt_len; l++) {
+ if (pos >= asf_pkt->data_size)
+ break;
+ for (j = 0; j < asf->asf_st[i]->span; j++) {
+ memcpy(buf->data + pos,
+ p + (j * nchunks + l) * chunk_len,
+ chunk_len);
+ pos += chunk_len;
+ }
+ }
+ p += asf->asf_st[i]->span * pkt_len;
+ if (p > asf_pkt->avpkt->data + asf_pkt->data_size)
+ break;
+ }
+ av_free_packet(asf_pkt->avpkt);
+ av_free(asf_pkt->avpkt);
+ asf_pkt->avpkt = buf;
+
+ return 0;
+}
+
+static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ int ret, i;
+
+ if ((avio_tell(pb) >= asf->data_offset + asf->data_size) && !(asf->b_flags
& 1))
+ return AVERROR_EOF;
+ while (!pb->eof_reached) {
+ if (asf->state == PARSE_PACKET_HEADER) {
+ read_packet_header(s);
+ if (!asf->nb_mult_left)
+ asf->state = READ_SINGLE;
+ else
+ asf->state = READ_MULTI;
+ }
+ switch (asf->state) {
+ case READ_SINGLE:
+ if ((ret = read_payload(s, pkt)) < 0)
+ return ret;
+ if (!asf->sub_left)
+ asf->state = PARSE_PACKET_HEADER;
+ break;
+ case READ_SUB:
+ if ((ret = read_payload(s, pkt)) < 0)
+ return ret;
+ if (!asf->sub_left) {
+ asf->state = PARSE_PACKET_HEADER;
+ }
+ break;
+ case READ_MULTI_SUB:
+ if ((ret = read_payload(s, pkt)) < 0)
+ return ret;
+ if (!asf->sub_left && !asf->nb_mult_left) {
+ asf->state = PARSE_PACKET_HEADER;
+ if (!asf->return_subpayload) {
+ avio_skip(pb, asf->pad_len); // skip padding
+ }
+ if (asf->packet_offset + asf->packet_size > avio_tell(pb)) {
+ avio_seek(pb, asf->packet_offset + asf->packet_size,
SEEK_SET);
+ }
+ } else if (!asf->sub_left)
+ asf->state = READ_MULTI;
+ break;
+ case READ_MULTI:
+ if ((ret = read_payload(s, pkt)) < 0)
+ return ret;
+ if (!asf->nb_mult_left) {
+ asf->state = PARSE_PACKET_HEADER;
+ if (!asf->return_subpayload) {
+ avio_skip(pb, asf->pad_len); // skip padding
+ }
+ if (asf->packet_offset + asf->packet_size > avio_tell(pb))
+ avio_seek(pb, asf->packet_offset + asf->packet_size,
SEEK_SET);
+ }
+ break;
+ }
+ if (asf->return_subpayload) {
+ asf->return_subpayload = 0;
+ return 0;
+ }
+ for (i = 0; i < s->nb_streams; i++) {
+ ASFPacket *asf_pkt = asf->asf_st[i]->pkt;
+ if (!asf_pkt->size_left && asf_pkt->data_size) {
+ if (asf->asf_st[i]->span > 1 && asf->asf_st[i]->type ==
AVMEDIA_TYPE_AUDIO)
+ if ((ret = do_deinterleaving(s, asf_pkt, i)) < 0)
+ return ret;
+ av_packet_move_ref(pkt, asf_pkt->avpkt);
+ pkt->stream_index = asf->asf_st[i]->index;
+ pkt->flags = asf_pkt->flags;
+ pkt->dts = asf_pkt->dts - asf->preroll;
+ asf_pkt->data_size = 0;
+ asf_pkt->frame_num = 0;
+ return 0;
+ }
+ }
+ }
+
+ if (pb->eof_reached)
+ return AVERROR_EOF;
+
+ return 0;
+}
+
+static int asf_read_close(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+ int i;
+
+ for (i = 0; i < asf->nb_streams; i++) {
+ av_free_packet(asf->asf_st[i]->pkt->avpkt);
+ av_free(asf->asf_st[i]->pkt->avpkt);
+ av_free(asf->asf_st[i]->pkt);
+ av_free(asf->asf_st[i]->sb);
+ av_free(asf->asf_st[i]);
+ }
+
+ return 0;
+}
+
+static void reset_packet_state(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+ int i;
+
+ asf->state = PARSE_PACKET_HEADER;
+ asf->offset = 0;
+ asf->return_subpayload = 0;
+ asf->sub_left = 0;
+ asf->sub_header_offset = 0;
+ asf->packet_offset = asf->first_packet_offset;
+ asf->pad_len = 0;
+ asf->rep_len = 0;
+ asf->dts_delta = 0;
+ asf->mult_sub_len = 0;
+ asf->nb_mult_left = 0;
+ asf->nb_sub = 0;
+ asf->prop_flags = 0;
+ asf->sub_dts = 0;
+ asf->dts = 0;
+ for (i = 0; i < asf->nb_streams; i++) {
+ ASFPacket *pkt = asf->asf_st[i]->pkt;
+ pkt->size_left = 0;
+ pkt->data_size = 0;
+ pkt->duration = 0;
+ pkt->flags = 0;
+ pkt->dts = 0;
+ pkt->duration = 0;
+ av_free_packet(pkt->avpkt);
+ av_init_packet(pkt->avpkt);
+ }
+}
+
+static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
+ int64_t *pos, int64_t pos_limit)
+{
+ ASFContext *asf = s->priv_data;
+ AVPacket *pkt = av_mallocz(sizeof(*pkt));
+ int64_t pkt_pos = *pos, pkt_offset, dts = 0, data_end;
+ int n;
+
+ if (!pkt)
+ return AVERROR(ENOMEM);
+ data_end = asf->data_offset + asf->data_size;
+ if (pkt_pos > (asf->first_packet_offset + asf->packet_size) &&
+ pkt_pos < data_end) {
+ n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
asf->packet_size;
+ pkt_pos = ((pkt_pos - asf->first_packet_offset) % asf->packet_size) ?
+ asf->first_packet_offset + (n + 1) * asf->packet_size :
+ asf->first_packet_offset + n * asf->packet_size;
+ } else if (pkt_pos < (asf->first_packet_offset + asf->packet_size))
+ pkt_pos = asf->first_packet_offset;
+ else
+ pkt_pos = data_end - asf->packet_size; // last packet offset
+ avio_seek(s->pb, pkt_pos, SEEK_SET);
+ pkt_offset = pkt_pos;
+
+ reset_packet_state(s);
+ while (avio_tell(s->pb) < data_end) {
+ int i, ret, st_found;
+
+ av_init_packet(pkt);
+ pkt_offset = avio_tell(s->pb);
+ if ((ret = asf_read_packet(s, pkt)) < 0) {
+ dts = AV_NOPTS_VALUE;
+ return ret;
+ }
+ // ASFPacket may contain fragments of packets belonging to different
streams,
+ // pkt_offset is the offset of the first fragment within it
+ if (pkt_offset >= (pkt_pos + asf->packet_size))
+ pkt_pos += asf->packet_size;
+ for (i = 0; i < asf->nb_streams; i++) {
+ ASFStreamDemux *st = asf->asf_st[i];
+
+ st_found = 0;
+ if (pkt->flags & AV_PKT_FLAG_KEY) {
+ dts = pkt->dts;
+ if (dts) {
+ av_add_index_entry(s->streams[pkt->stream_index], pkt_pos,
dts,
+ pkt->size, 0, AVINDEX_KEYFRAME);
+ if (stream_index == st->index) {
+ st_found = 1;
+ break;
+ }
+ }
+ }
+ }
+ if (st_found)
+ break;
+ av_free_packet(pkt);
+ }
+ *pos = pkt_pos;
+
+ av_free(pkt);
+ if (!dts)
+ dts = AV_NOPTS_VALUE;
+ return dts;
+}
+
+static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t
timestamp, int flags)
+{
+ ASFContext *asf = s->priv_data;
+ int idx;
+
+ if (!timestamp) {
+ reset_packet_state(s);
+ avio_seek(s->pb, asf->first_packet_offset, SEEK_SET);
+ return 0;
+ }
+ if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
+ idx = av_index_search_timestamp(s->streams[stream_index], timestamp,
flags);
+ if (idx < 0 || idx > s->streams[stream_index]->nb_index_entries) {
+ return AVERROR_INVALIDDATA;
+ }
+ avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos,
SEEK_SET);
+ } else {
+ if (ff_seek_frame_binary(s, stream_index, timestamp, flags) < 0) {
+ return AVERROR_INVALIDDATA;
+ }
+ // read_timestamp is called inside ff_seek_frame_binary and leaves
state dirty,
+ // so reset_packet_state have to be called after it
+ reset_packet_state(s);
+ }
+
+ return 0;
+}
+
+static GUIDParseTable *find_guid(ff_asf_guid guid)
+{
+ int j, ret;
+ GUIDParseTable *g;
+
+ g = gdef;
+ for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
+ if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
+ return g;
+ g++;
+ }
+
+ return NULL;
+}
+
+static int detect_unknown_subobject(AVFormatContext *s, int64_t offset,
int64_t size)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ GUIDParseTable *g = NULL;
+ ff_asf_guid guid;
+ int ret;
+
+ while (avio_tell(pb) <= offset + size) {
+ asf->offset = avio_tell(pb);
+ if ((ret = ff_get_guid(pb, &guid)) < 0)
+ return ret;
+ swap_guid(guid);
+ g = find_guid(guid);
+ if (g) {
+ if ((ret = g->read_object(s, g)) < 0)
+ return ret;
+ } else {
+ g = av_mallocz(sizeof(GUIDParseTable));
+ if (!g)
+ return AVERROR(ENOMEM);
+ g->name = "Unknown";
+ g->is_subobject = 1;
+ read_unknown(s, g);
+ av_free(g);
+ }
+ }
+ check_position(pb, offset, size);
+
+ return 0;
+}
+
+static int asf_read_header(AVFormatContext *s)
+{
+ ASFContext *asf = s->priv_data;
+ AVIOContext *pb = s->pb;
+ GUIDParseTable *g = NULL;
+ ff_asf_guid guid;
+ int ret, is_seek = 0;
+
+ asf->preroll = 0;
+ asf->seekable = 1;
+ asf->is_simple_index = 0;
+ ff_get_guid(pb, &guid);
+ if (ff_guidcmp(&guid, &ff_asf_header))
+ return AVERROR_INVALIDDATA;
+ asf->header_obj_size = avio_rl64(pb);
+ avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
+ asf->data_reached = 0;
+ // 1 is here instead of pb->eof_reached because I skip Data for the first
time,
+ // read Indexes and get eof and then I seek back to the Data
+ while (1) {
+ asf->offset = avio_tell(pb);
+ if (asf->offset > asf->header_obj_size && !asf->data_reached) {
+ avio_seek(pb, asf->header_obj_size, SEEK_SET);
+ asf->offset = asf->header_obj_size;
+ }
+ if ((ret = ff_get_guid(pb, &guid)) < 0) {
+ if (ret == AVERROR_EOF && asf->data_reached) {
+ avio_seek(pb, asf->data_offset, SEEK_SET);
+ is_seek = 1;
+ continue;
+ } else
+ return ret;
+ }
+ swap_guid(guid);
+ g = find_guid(guid);
+ if (g) {
+ asf->unknown_offset = asf->offset;
+ asf->is_header = 1;
+ if ((ret = g->read_object(s, g)) < 0)
+ return ret;
+ }
+ if (is_seek || !asf->seekable)
+ break;
+ }
+
+ return 0;
+}
+
+AVInputFormat ff_asf_demuxer = {
+ .name = "asf",
+ .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming
Format)"),
+ .priv_data_size = sizeof(ASFContext),
+ .read_probe = asf_probe,
+ .read_header = asf_read_header,
+ .read_packet = asf_read_packet,
+ .read_close = asf_read_close,
+ .read_timestamp = asf_read_timestamp,
+ .read_seek = asf_read_seek,
+ .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
+};
--
1.7.10.4
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