-- Mats Peterson http://matsp888.no-ip.org/~mats/
>From 0294d37cd23f971376290be68dd681513740bb06 Mon Sep 17 00:00:00 2001 From: Mats Peterson <matsp...@yahoo.com> Date: Fri, 19 Feb 2016 16:23:17 +0100 Subject: [PATCH 2/3] lavf/avienc: Write palette after BITMAPINFOHEADER
--- libavformat/avienc.c | 31 +++++++++++++++++++++++++++---- 1 file changed, 27 insertions(+), 4 deletions(-) diff --git a/libavformat/avienc.c b/libavformat/avienc.c index 4e7bca4..3c357a2 100644 --- a/libavformat/avienc.c +++ b/libavformat/avienc.c @@ -79,6 +79,8 @@ typedef struct AVIStream { AVIIndex indexes; } AVIStream; +static int hdr_pal_done; + static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt); static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id) @@ -211,6 +213,9 @@ static int avi_write_header(AVFormatContext *s) return AVERROR(ENOMEM); } + /* Palette after BITMAPINFOHEADER in strf chunk */ + hdr_pal_done = 0; + /* header list */ avi->riff_id = 0; list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl"); @@ -359,6 +364,12 @@ static int avi_write_header(AVFormatContext *s) && enc->pix_fmt == AV_PIX_FMT_RGB555LE && enc->bits_per_coded_sample == 15) enc->bits_per_coded_sample = 16; + /* Use private data for palette offset */ + if (enc->bits_per_coded_sample <= 8) { + enc->priv_data = av_malloc(sizeof(int64_t)); + if (!enc->priv_data) + return AVERROR(ENOMEM); + } ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0); pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi, enc->bits_per_coded_sample); @@ -673,16 +684,28 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) if (ret) { if (ret == CONTAINS_PAL) { int pc_tag, i; + int pal_size = 1 << enc->bits_per_coded_sample; + if (!hdr_pal_done) { + int64_t cur_offset = avio_tell(pb); + int64_t *pal_offset = (int64_t *)enc->priv_data; + avio_seek(pb, *pal_offset, SEEK_SET); + for (i = 0; i < pal_size; i++) { + uint32_t v = AV_RL32(data + size - 4*pal_size + 4*i); + avio_wl32(pb, v & 0xffffff); + } + avio_seek(pb, cur_offset, SEEK_SET); + av_free(enc->priv_data); + hdr_pal_done++; + } avi_stream2fourcc(tag, stream_index, enc->codec_type); tag[2] = 'p'; tag[3] = 'c'; - pc_tag = ff_start_tag(pb, tag); avio_w8(pb, 0); avio_w8(pb, 0); avio_wl16(pb, 0); // reserved - for (i = 0; i<256; i++) { - uint32_t v = AV_RL32(data + size - 1024 + 4*i); - avio_wb32(pb, v<<8); + for (i = 0; i < pal_size; i++) { + uint32_t v = AV_RL32(data + size - 4*pal_size + 4*i); + avio_wl32(pb, v & 0xffffff); } ff_end_tag(pb, pc_tag); } -- 1.7.10.4
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