--- doc/bitstream_filters.texi | 13 ++++ libavcodec/Makefile | 2 + libavcodec/bitstream_filters.c | 1 + libavcodec/h264_trace_bsf.c | 161 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 177 insertions(+) create mode 100644 libavcodec/h264_trace_bsf.c
diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi index 64f91f4b5..e1c268251 100644 --- a/doc/bitstream_filters.texi +++ b/doc/bitstream_filters.texi @@ -41,6 +41,19 @@ bitstream after extraction. @section h264_mp4toannexb +@section h264_trace + +Generate trace output containing all syntax elements in the H.264 +stream headers (everything above the level of @emph{slice_data()}). +Includes SPS, PPS, AUD, slice headers, and some SEI. + +This is written to the normal logging facility by default. + +@table @option +@item output_file +Write trace output to this file instead. +@end table + @section imx_dump_header @section mjpeg2jpeg diff --git a/libavcodec/Makefile b/libavcodec/Makefile index e83513384..df0a563c3 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -766,6 +766,8 @@ OBJS-$(CONFIG_DUMP_EXTRADATA_BSF) += dump_extradata_bsf.o OBJS-$(CONFIG_EXTRACT_EXTRADATA_BSF) += extract_extradata_bsf.o \ h2645_parse.o OBJS-$(CONFIG_H264_MP4TOANNEXB_BSF) += h264_mp4toannexb_bsf.o +OBJS-$(CONFIG_H264_TRACE_BSF) += h264_trace_bsf.o \ + h264_raw.o OBJS-$(CONFIG_HEVC_MP4TOANNEXB_BSF) += hevc_mp4toannexb_bsf.o OBJS-$(CONFIG_IMX_DUMP_HEADER_BSF) += imx_dump_header_bsf.o OBJS-$(CONFIG_MJPEG2JPEG_BSF) += mjpeg2jpeg_bsf.o diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c index 79ce40f9e..f5c842a28 100644 --- a/libavcodec/bitstream_filters.c +++ b/libavcodec/bitstream_filters.c @@ -29,6 +29,7 @@ extern const AVBitStreamFilter ff_chomp_bsf; extern const AVBitStreamFilter ff_dump_extradata_bsf; extern const AVBitStreamFilter ff_extract_extradata_bsf; extern const AVBitStreamFilter ff_h264_mp4toannexb_bsf; +extern const AVBitStreamFilter ff_h264_trace_bsf; extern const AVBitStreamFilter ff_hevc_mp4toannexb_bsf; extern const AVBitStreamFilter ff_imx_dump_header_bsf; extern const AVBitStreamFilter ff_mjpeg2jpeg_bsf; diff --git a/libavcodec/h264_trace_bsf.c b/libavcodec/h264_trace_bsf.c new file mode 100644 index 000000000..563261f1f --- /dev/null +++ b/libavcodec/h264_trace_bsf.c @@ -0,0 +1,161 @@ +/* + * 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 <stdarg.h> +#include <stdio.h> + +#include "libavutil/common.h" +#include "libavutil/log.h" +#include "libavutil/opt.h" + +#include "bsf.h" +#include "h264_raw.h" + +typedef struct H264TraceContext { + H264RawContext raw; + + const char *output_file_name; + FILE *output_file; +} H264TraceContext; + + +static void h264_trace_callback(void *context, int new_block, const char *format, ...) +{ + AVBSFContext *bsf = context; + H264TraceContext *ctx = bsf->priv_data; + va_list vl; + va_start(vl, format); + + if (ctx->output_file) { + if (new_block) + fprintf(ctx->output_file, "\n"); + + vfprintf(ctx->output_file, format, vl); + + if (new_block) + fprintf(ctx->output_file, "\n"); + } else { + av_vlog(bsf, AV_LOG_INFO, format, vl); + } + + va_end(vl); +} + +static int h264_trace_init(AVBSFContext *bsf) +{ + H264TraceContext *ctx = bsf->priv_data; + int err; + + err = ff_h264_raw_init(&ctx->raw, bsf); + if (err < 0) + return err; + + ctx->raw.trace_enable = 1; + + if (ctx->output_file_name) { + ctx->output_file = fopen(ctx->output_file_name, "w"); + if (!ctx->output_file) { + err = errno; + av_log(ctx, AV_LOG_ERROR, "Failed to open " + "output file %s: %m.", ctx->output_file_name); + return AVERROR(err); + } + } + ctx->raw.trace_callback = &h264_trace_callback; + ctx->raw.trace_callback_context = bsf; + + if (bsf->par_in->extradata) { + H264RawAccessUnit ps; + + h264_trace_callback(bsf, 0, "\nExtradata\n"); + + err = ff_h264_raw_read_extradata(&ctx->raw, &ps, bsf->par_in); + if (err < 0) { + av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n"); + return err; + } + + ff_h264_raw_access_unit_uninit(&ps); + } + + return 0; +} + +static void h264_trace_close(AVBSFContext *bsf) +{ + H264TraceContext *ctx = bsf->priv_data; + + ff_h264_raw_uninit(&ctx->raw); + + if (ctx->output_file) + fclose(ctx->output_file); +} + +static int h264_trace(AVBSFContext *bsf, AVPacket *out) +{ + H264TraceContext *ctx = bsf->priv_data; + H264RawAccessUnit au; + AVPacket *in; + int err; + + err = ff_bsf_get_packet(bsf, &in); + if (err < 0) + return err; + + h264_trace_callback(bsf, 0, "\nPacket (pts %"PRId64")\n", + in->pts); + + err = ff_h264_raw_read_packet(&ctx->raw, &au, in); + if (err < 0) + return err; + + ff_h264_raw_access_unit_uninit(&au); + + av_packet_move_ref(out, in); + av_packet_free(&in); + + return 0; +} + +#define OFFSET(x) offsetof(H264TraceContext, x) +static const AVOption h264_trace_options[] = { + { "output_file", "Write output to file rather than log", + OFFSET(output_file_name), AV_OPT_TYPE_STRING, { .str = NULL } }, + { NULL } +}; + +static const AVClass h264_trace_class = { + .class_name = "h264_trace_bsf", + .item_name = av_default_item_name, + .option = h264_trace_options, + .version = LIBAVCODEC_VERSION_MAJOR, +}; + +static const enum AVCodecID h264_trace_codec_ids[] = { + AV_CODEC_ID_H264, AV_CODEC_ID_NONE, +}; + +const AVBitStreamFilter ff_h264_trace_bsf = { + .name = "h264_trace", + .priv_data_size = sizeof(H264TraceContext), + .priv_class = &h264_trace_class, + .init = &h264_trace_init, + .close = &h264_trace_close, + .filter = &h264_trace, + .codec_ids = h264_trace_codec_ids, +}; -- 2.11.0 _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel