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avformat/mov: Add simple ACLR atom reading to set the color range of the incomming track for codec's like DNxHD that utilise AVID's proprietary atom.

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On input ACLR will be used to set colour range no matter which codec
it is associated with.
No change for when it will be output.

Rework mov_read_extradata function to allow detection of truncated
atom reads by callers.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Kevin Wheatley 2015-02-19 11:08:14 +00:00 committed by Michael Niedermayer
parent 2280552057
commit fb3fb1d0d4
1 changed files with 87 additions and 22 deletions
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109
libavformat/mov.c
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@ -1079,42 +1079,66 @@ static int mov_read_fiel(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return 0;
}
static int mov_realloc_extradata(AVCodecContext *codec, MOVAtom atom)
{
int err = 0;
uint64_t size = (uint64_t)codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
return AVERROR_INVALIDDATA;
if ((err = av_reallocp(&codec->extradata, size)) < 0) {
codec->extradata_size = 0;
return err;
}
codec->extradata_size = size - FF_INPUT_BUFFER_PADDING_SIZE;
return 0;
}
/* Read a whole atom into the extradata return the size of the atom read, possibly truncated if != atom.size */
static int64_t mov_read_atom_into_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
AVCodecContext *codec, uint8_t *buf)
{
int64_t result = atom.size;
int err;
AV_WB32(buf , atom.size + 8);
AV_WL32(buf + 4, atom.type);
err = avio_read(pb, buf + 8, atom.size);
if (err < 0) {
codec->extradata_size -= atom.size;
return err;
} else if (err < atom.size) {
av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
codec->extradata_size -= atom.size - err;
result = err;
}
memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
return result;
}
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
enum AVCodecID codec_id)
{
AVStream *st;
uint64_t size;
uint8_t *buf;
uint64_t original_size;
int err;
if (c->fc->nb_streams < 1) // will happen with jp2 files
return 0;
st= c->fc->streams[c->fc->nb_streams-1];
st = c->fc->streams[c->fc->nb_streams-1];
if (st->codec->codec_id != codec_id)
return 0; /* unexpected codec_id - don't mess with extradata */
size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
if (size > INT_MAX || (uint64_t)atom.size > INT_MAX)
return AVERROR_INVALIDDATA;
if ((err = av_reallocp(&st->codec->extradata, size)) < 0) {
st->codec->extradata_size = 0;
original_size = st->codec->extradata_size;
err = mov_realloc_extradata(st->codec, atom);
if (err)
return err;
}
buf = st->codec->extradata + st->codec->extradata_size;
st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
AV_WB32( buf , atom.size + 8);
AV_WL32( buf + 4, atom.type);
err = avio_read(pb, buf + 8, atom.size);
if (err < 0) {
err = mov_read_atom_into_extradata(c, pb, atom, st->codec, st->codec->extradata + original_size);
if (err < 0)
return err;
} else if (err < atom.size) {
av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
st->codec->extradata_size -= atom.size - err;
}
memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
return 0;
return 0; // Note: this is the original behavior to ignore truncation.
}
/* wrapper functions for reading ALAC/AVS/MJPEG/MJPEG2000 extradata atoms only for those codecs */
@ -1178,6 +1202,47 @@ static int mov_read_ares(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return mov_read_avid(c, pb, atom);
}
static int mov_read_aclr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
int ret = 0;
int length = 0;
uint64_t original_size;
if (c->fc->nb_streams >= 1) {
AVCodecContext *codec = c->fc->streams[c->fc->nb_streams-1]->codec;
if (atom.size == 16) {
original_size = codec->extradata_size;
ret = mov_realloc_extradata(codec, atom);
if (!ret) {
length = mov_read_atom_into_extradata(c, pb, atom, codec, codec->extradata + original_size);
if (length == atom.size) {
const uint8_t range_value = codec->extradata[original_size + 19];
switch (range_value) {
case 1:
codec->color_range = AVCOL_RANGE_MPEG;
break;
case 2:
codec->color_range = AVCOL_RANGE_JPEG;
break;
default:
av_log(c, AV_LOG_WARNING, "ignored unknown aclr value (%d)\n", range_value);
break;
}
av_dlog(c, "color_range: %"PRIu8"\n", codec->color_range);
} else {
/* For some reason the whole atom was not added to the extradata */
av_log(c, AV_LOG_ERROR, "aclr not decoded - incomplete atom\n");
}
} else {
av_log(c, AV_LOG_ERROR, "aclr not decoded - unable to add atom to extradata\n");
}
} else {
av_log(c, AV_LOG_WARNING, "aclr not decoded - unexpected size %ld\n", atom.size);
}
}
return ret;
}
static int mov_read_svq3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
return mov_read_extradata(c, pb, atom, AV_CODEC_ID_SVQ3);
@ -3390,7 +3455,7 @@ static int mov_read_free(MOVContext *c, AVIOContext *pb, MOVAtom atom)
}
static const MOVParseTableEntry mov_default_parse_table[] = {
{ MKTAG('A','C','L','R'), mov_read_avid },
{ MKTAG('A','C','L','R'), mov_read_aclr },
{ MKTAG('A','P','R','G'), mov_read_avid },
{ MKTAG('A','A','L','P'), mov_read_avid },
{ MKTAG('A','R','E','S'), mov_read_ares },