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Merge commit '8f629a986c46f227abda1811a6ad1f449871ca35'

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* commit '8f629a986c46f227abda1811a6ad1f449871ca35':
  isom: convert mp4 dvdsub extradata to vobsub format

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-16 13:33:55 +01:00
commit 09680951df
1 changed files with 57 additions and 0 deletions
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57
libavformat/isom.c
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@ -26,6 +26,7 @@
#include "isom.h"
#include "libavcodec/mpeg4audio.h"
#include "libavcodec/mpegaudiodata.h"
#include "libavutil/intreadwrite.h"
/* http://www.mp4ra.org */
/* ordered by muxing preference */
@ -437,8 +438,60 @@ static const AVCodecTag mp4_audio_types[] = {
{ AV_CODEC_ID_NONE, AOT_NULL },
};
static uint32_t yuv_to_rgba(uint32_t ycbcr)
{
uint8_t r, g, b;
int y, cb, cr;
y = (ycbcr >> 16) & 0xFF;
cr = (ycbcr >> 8) & 0xFF;
cb = ycbcr & 0xFF;
b = av_clip_uint8(1.164 * (y - 16) + 2.018 * (cb - 128));
g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
return (r << 16) | (g << 8) | b;
}
static int mov_rewrite_dvd_sub_extradata(AVStream *st)
{
char pal_s[256];
char buf[256];
int pal_s_pos = 0;
uint8_t *src = st->codec->extradata;
if (st->codec->extradata_size != 64)
return 0;
for (int i = 0; i < 16; i++) {
uint32_t yuv = AV_RB32(src + i * 4);
uint32_t rgba = yuv_to_rgba(yuv);
snprintf(pal_s + pal_s_pos, sizeof(pal_s) - pal_s_pos, "%06x%s", rgba,
i != 15 ? ", " : "");
pal_s_pos = strlen(pal_s);
if (pal_s_pos >= sizeof(pal_s))
return 0;
}
snprintf(buf, sizeof(buf), "size: %dx%d\npalette: %s\n",
st->codec->width, st->codec->height, pal_s);
av_freep(&st->codec->extradata);
st->codec->extradata_size = 0;
st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata_size = strlen(buf);
memcpy(st->codec->extradata, buf, st->codec->extradata_size);
return 0;
}
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
{
int err;
int len, tag;
int ret;
int object_type_id = avio_r8(pb);
@ -481,6 +534,10 @@ int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext
cfg.object_type)))
st->codec->codec_id = AV_CODEC_ID_AAC;
}
if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
return err;
}
}
return 0;
}