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FFmpeg
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Merge commit '255d9c570e117f0fcb8e51fa2c5996f3c4b2052b' 

* commit '255d9c570e117f0fcb8e51fa2c5996f3c4b2052b':
  riff: Move demuxing code to a separate file.

Conflicts:
	configure
	libavformat/riff.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
tags/n2.1
Michael Niedermayer 11 years ago
parent
508a5349da 255d9c570e
commit
0a8f5eb23a
4 changed files with 261 additions and 223 deletions
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  1. +13
    -0
      configure
  2. +1
    -0
      libavformat/Makefile
  3. +0
    -223
      libavformat/riff.c
  4. +247
    -0
      libavformat/riffdec.c

+ 13
- 0
configure View File

@@ -1574,6 +1574,7 @@ CONFIG_EXTRA="
mpegvideoenc mpegvideoenc
nettle nettle
rangecoder rangecoder
riffdec
riffenc riffenc
rtpdec rtpdec
rtpenc_chain rtpenc_chain
@@ -2025,13 +2026,18 @@ libutvideo_encoder_deps="libutvideo"


# demuxers / muxers # demuxers / muxers
ac3_demuxer_select="ac3_parser" ac3_demuxer_select="ac3_parser"
asf_demuxer_select="riffdec"
asf_muxer_select="riffenc" asf_muxer_select="riffenc"
asf_stream_muxer_select="asf_muxer" asf_stream_muxer_select="asf_muxer"
avi_demuxer_select="riffdec"
avi_muxer_select="riffenc" avi_muxer_select="riffenc"
avisynth_demuxer_deps="avisynth" avisynth_demuxer_deps="avisynth"
avisynth_demuxer_select="riffdec"
caf_demuxer_select="riffdec"
dirac_demuxer_select="dirac_parser" dirac_demuxer_select="dirac_parser"
dts_demuxer_select="dca_parser" dts_demuxer_select="dca_parser"
dtshd_demuxer_select="dca_parser" dtshd_demuxer_select="dca_parser"
dxa_demuxer_select="riffdec"
eac3_demuxer_select="ac3_parser" eac3_demuxer_select="ac3_parser"
f4v_muxer_select="mov_muxer" f4v_muxer_select="mov_muxer"
flac_demuxer_select="flac_parser" flac_demuxer_select="flac_parser"
@@ -2040,9 +2046,11 @@ ismv_muxer_select="mov_muxer"
libnut_demuxer_deps="libnut" libnut_demuxer_deps="libnut"
libnut_muxer_deps="libnut" libnut_muxer_deps="libnut"
matroska_audio_muxer_select="matroska_muxer" matroska_audio_muxer_select="matroska_muxer"
matroska_demuxer_select="riffdec"
matroska_demuxer_suggest="bzlib lzo zlib" matroska_demuxer_suggest="bzlib lzo zlib"
matroska_muxer_select="riffenc" matroska_muxer_select="riffenc"
mmf_muxer_select="riffenc" mmf_muxer_select="riffenc"
mov_demuxer_select="riffdec"
mov_demuxer_suggest="zlib" mov_demuxer_suggest="zlib"
mov_muxer_select="riffenc rtpenc_chain" mov_muxer_select="riffenc rtpenc_chain"
mp3_demuxer_select="mpegaudio_parser" mp3_demuxer_select="mpegaudio_parser"
@@ -2051,6 +2059,7 @@ mpegts_muxer_select="adts_muxer latm_muxer"
mpegtsraw_demuxer_select="mpegts_demuxer" mpegtsraw_demuxer_select="mpegts_demuxer"
mxf_d10_muxer_select="mxf_muxer" mxf_d10_muxer_select="mxf_muxer"
nut_muxer_select="riffenc" nut_muxer_select="riffenc"
nuv_demuxer_select="riffdec"
ogg_demuxer_select="golomb" ogg_demuxer_select="golomb"
psp_muxer_select="mov_muxer" psp_muxer_select="mov_muxer"
rtp_demuxer_select="sdp_demuxer" rtp_demuxer_select="sdp_demuxer"
@@ -2068,8 +2077,12 @@ tgp_muxer_select="mov_muxer"
vobsub_demuxer_select="mpegps_demuxer" vobsub_demuxer_select="mpegps_demuxer"
w64_demuxer_deps="wav_demuxer" w64_demuxer_deps="wav_demuxer"
w64_muxer_deps="wav_muxer" w64_muxer_deps="wav_muxer"
wav_demuxer_select="riffdec"
wav_muxer_select="riffenc" wav_muxer_select="riffenc"
webm_muxer_select="riffenc" webm_muxer_select="riffenc"
wtv_demuxer_select="riffdec"
xmv_demuxer_select="riffdec"
xwma_demuxer_select="riffdec"


# indevs / outdevs # indevs / outdevs
alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp" alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"


+ 1
- 0
libavformat/Makefile View File

@@ -25,6 +25,7 @@ OBJS = allformats.o \
utils.o \ utils.o \


OBJS-$(CONFIG_NETWORK) += network.o OBJS-$(CONFIG_NETWORK) += network.o
OBJS-$(CONFIG_RIFFDEC) += riffdec.o
OBJS-$(CONFIG_RIFFENC) += riffenc.o OBJS-$(CONFIG_RIFFENC) += riffenc.o
OBJS-$(CONFIG_RTPDEC) += rdt.o \ OBJS-$(CONFIG_RTPDEC) += rdt.o \
rtp.o \ rtp.o \


+ 0
- 223
libavformat/riff.c View File

@@ -20,13 +20,9 @@
*/ */


#include "libavutil/error.h" #include "libavutil/error.h"
#include "libavutil/log.h"
#include "libavcodec/avcodec.h" #include "libavcodec/avcodec.h"
#include "avformat.h" #include "avformat.h"
#include "avio_internal.h"
#include "riff.h" #include "riff.h"
#include "libavcodec/bytestream.h"
#include "libavutil/avassert.h"


/* Note: When encoding, the first matching tag is used, so order is /* Note: When encoding, the first matching tag is used, so order is
* important if multiple tags are possible for a given codec. * important if multiple tags are possible for a given codec.
@@ -422,14 +418,6 @@ const AVCodecTag ff_codec_wav_tags[] = {
{ AV_CODEC_ID_NONE, 0 }, { AV_CODEC_ID_NONE, 0 },
}; };


const AVCodecGuid ff_codec_wav_guids[] = {
{ AV_CODEC_ID_AC3, { 0x2C, 0x80, 0x6D, 0xE0, 0x46, 0xDB, 0xCF, 0x11, 0xB4, 0xD1, 0x00, 0x80, 0x5F, 0x6C, 0xBB, 0xEA } },
{ AV_CODEC_ID_ATRAC3P, { 0xBF, 0xAA, 0x23, 0xE9, 0x58, 0xCB, 0x71, 0x44, 0xA1, 0x19, 0xFF, 0xFA, 0x01, 0xE4, 0xCE, 0x62 } },
{ AV_CODEC_ID_EAC3, { 0xAF, 0x87, 0xFB, 0xA7, 0x02, 0x2D, 0xFB, 0x42, 0xA4, 0xD4, 0x05, 0xCD, 0x93, 0x84, 0x3B, 0xDD } },
{ AV_CODEC_ID_MP2, { 0x2B, 0x80, 0x6D, 0xE0, 0x46, 0xDB, 0xCF, 0x11, 0xB4, 0xD1, 0x00, 0x80, 0x5F, 0x6C, 0xBB, 0xEA } },
{ AV_CODEC_ID_NONE }
};

const AVMetadataConv ff_riff_info_conv[] = { const AVMetadataConv ff_riff_info_conv[] = {
{ "IART", "artist" }, { "IART", "artist" },
{ "ICMT", "comment" }, { "ICMT", "comment" },
@@ -447,22 +435,6 @@ const AVMetadataConv ff_riff_info_conv[] = {
{ 0 }, { 0 },
}; };


void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
{
av_assert0(sizeof(*g) == 16); //compiler will optimize this out
if (avio_read(s, *g, sizeof(*g)) < (int)sizeof(*g))
memset(*g, 0, sizeof(*g));
}

enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
{
int i;
for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++)
if (!ff_guidcmp(guids[i].guid, guid))
return guids[i].id;
return AV_CODEC_ID_NONE;
}

const struct AVCodecTag *avformat_get_riff_video_tags(void) const struct AVCodecTag *avformat_get_riff_video_tags(void)
{ {
return ff_codec_bmp_tags; return ff_codec_bmp_tags;
@@ -472,198 +444,3 @@ const struct AVCodecTag *avformat_get_riff_audio_tags(void)
{ {
return ff_codec_wav_tags; return ff_codec_wav_tags;
} }

#if CONFIG_DEMUXERS
/* We could be given one of the three possible structures here:
* WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
* is an expansion of the previous one with the fields added
* at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
* WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
* an openended structure.
*/

static void parse_waveformatex(AVIOContext *pb, AVCodecContext *c)
{
ff_asf_guid subformat;
int bps = avio_rl16(pb);
if (bps)
c->bits_per_coded_sample = bps;

c->channel_layout = avio_rl32(pb); /* dwChannelMask */

ff_get_guid(pb, &subformat);
if (!memcmp(subformat + 4,
(const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
c->codec_tag = AV_RL32(subformat);
c->codec_id = ff_wav_codec_get_id(c->codec_tag,
c->bits_per_coded_sample);
} else {
c->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
if (!c->codec_id)
av_log(c, AV_LOG_WARNING,
"unknown subformat:"FF_PRI_GUID"\n",
FF_ARG_GUID(subformat));
}
}

int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
{
int id;

id = avio_rl16(pb);
codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec->channels = avio_rl16(pb);
codec->sample_rate = avio_rl32(pb);
codec->bit_rate = avio_rl32(pb) * 8;
codec->block_align = avio_rl16(pb);
if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
codec->bits_per_coded_sample = 8;
} else
codec->bits_per_coded_sample = avio_rl16(pb);
if (id == 0xFFFE) {
codec->codec_tag = 0;
} else {
codec->codec_tag = id;
codec->codec_id = ff_wav_codec_get_id(id,
codec->bits_per_coded_sample);
}
if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
int cbSize = avio_rl16(pb); /* cbSize */
size -= 18;
cbSize = FFMIN(size, cbSize);
if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
parse_waveformatex(pb, codec);
cbSize -= 22;
size -= 22;
}
codec->extradata_size = cbSize;
if (cbSize > 0) {
av_free(codec->extradata);
codec->extradata = av_mallocz(codec->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!codec->extradata)
return AVERROR(ENOMEM);
avio_read(pb, codec->extradata, codec->extradata_size);
size -= cbSize;
}

/* It is possible for the chunk to contain garbage at the end */
if (size > 0)
avio_skip(pb, size);
}
if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
/* Channels and sample_rate values are those prior to applying SBR
* and/or PS. */
codec->channels = 0;
codec->sample_rate = 0;
}
/* override bits_per_coded_sample for G.726 */
if (codec->codec_id == AV_CODEC_ID_ADPCM_G726 && codec->sample_rate)
codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;

return 0;
}

enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
{
enum AVCodecID id;
id = ff_codec_get_id(ff_codec_wav_tags, tag);
if (id <= 0)
return id;

if (id == AV_CODEC_ID_PCM_S16LE)
id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
else if (id == AV_CODEC_ID_PCM_F32LE)
id = ff_get_pcm_codec_id(bps, 1, 0, 0);

if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
id = AV_CODEC_ID_PCM_ZORK;
return id;
}

int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
{
int tag1;
if(esize) *esize = avio_rl32(pb);
else avio_rl32(pb);
st->codec->width = avio_rl32(pb);
st->codec->height = (int32_t)avio_rl32(pb);
avio_rl16(pb); /* planes */
st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
tag1 = avio_rl32(pb);
avio_rl32(pb); /* ImageSize */
avio_rl32(pb); /* XPelsPerMeter */
avio_rl32(pb); /* YPelsPerMeter */
avio_rl32(pb); /* ClrUsed */
avio_rl32(pb); /* ClrImportant */
return tag1;
}

int ff_read_riff_info(AVFormatContext *s, int64_t size)
{
int64_t start, end, cur;
AVIOContext *pb = s->pb;

start = avio_tell(pb);
end = start + size;

while ((cur = avio_tell(pb)) >= 0 &&
cur <= end - 8 /* = tag + size */) {
uint32_t chunk_code;
int64_t chunk_size;
char key[5] = { 0 };
char *value;

chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (url_feof(pb)) {
if (chunk_code || chunk_size) {
av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
return AVERROR_INVALIDDATA;
}
return AVERROR_EOF;
}
if (chunk_size > end ||
end - chunk_size < cur ||
chunk_size == UINT_MAX) {
avio_seek(pb, -9, SEEK_CUR);
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
return AVERROR_INVALIDDATA;
}
}

chunk_size += (chunk_size & 1);

if (!chunk_code) {
if (chunk_size)
avio_skip(pb, chunk_size);
else if (pb->eof_reached) {
av_log(s, AV_LOG_WARNING, "truncated file\n");
return AVERROR_EOF;
}
continue;
}

value = av_mallocz(chunk_size + 1);
if (!value) {
av_log(s, AV_LOG_ERROR,
"out of memory, unable to read INFO tag\n");
return AVERROR(ENOMEM);
}

AV_WL32(key, chunk_code);

if (avio_read(pb, value, chunk_size) != chunk_size) {
av_log(s, AV_LOG_WARNING,
"premature end of file while reading INFO tag\n");
}

av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
}

return 0;
}
#endif /* CONFIG_DEMUXERS */

+ 247
- 0
libavformat/riffdec.c View File

@@ -0,0 +1,247 @@
/*
* RIFF demuxing functions and data
* Copyright (c) 2000 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "libavutil/dict.h"
#include "libavutil/error.h"
#include "libavutil/log.h"
#include "libavutil/mathematics.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/bytestream.h"
#include "avformat.h"
#include "avio_internal.h"
#include "riff.h"

const AVCodecGuid ff_codec_wav_guids[] = {
{ AV_CODEC_ID_AC3, { 0x2C, 0x80, 0x6D, 0xE0, 0x46, 0xDB, 0xCF, 0x11, 0xB4, 0xD1, 0x00, 0x80, 0x5F, 0x6C, 0xBB, 0xEA } },
{ AV_CODEC_ID_ATRAC3P, { 0xBF, 0xAA, 0x23, 0xE9, 0x58, 0xCB, 0x71, 0x44, 0xA1, 0x19, 0xFF, 0xFA, 0x01, 0xE4, 0xCE, 0x62 } },
{ AV_CODEC_ID_EAC3, { 0xAF, 0x87, 0xFB, 0xA7, 0x02, 0x2D, 0xFB, 0x42, 0xA4, 0xD4, 0x05, 0xCD, 0x93, 0x84, 0x3B, 0xDD } },
{ AV_CODEC_ID_MP2, { 0x2B, 0x80, 0x6D, 0xE0, 0x46, 0xDB, 0xCF, 0x11, 0xB4, 0xD1, 0x00, 0x80, 0x5F, 0x6C, 0xBB, 0xEA } },
{ AV_CODEC_ID_NONE }
};

void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
{
av_assert0(sizeof(*g) == 16); //compiler will optimize this out
if (avio_read(s, *g, sizeof(*g)) < (int)sizeof(*g))
memset(*g, 0, sizeof(*g));
}

enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
{
int i;
for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++)
if (!ff_guidcmp(guids[i].guid, guid))
return guids[i].id;
return AV_CODEC_ID_NONE;
}

/* We could be given one of the three possible structures here:
* WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
* is an expansion of the previous one with the fields added
* at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
* WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
* an openended structure.
*/

static void parse_waveformatex(AVIOContext *pb, AVCodecContext *c)
{
ff_asf_guid subformat;
int bps = avio_rl16(pb);
if (bps)
c->bits_per_coded_sample = bps;

c->channel_layout = avio_rl32(pb); /* dwChannelMask */

ff_get_guid(pb, &subformat);
if (!memcmp(subformat + 4,
(const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
c->codec_tag = AV_RL32(subformat);
c->codec_id = ff_wav_codec_get_id(c->codec_tag,
c->bits_per_coded_sample);
} else {
c->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
if (!c->codec_id)
av_log(c, AV_LOG_WARNING,
"unknown subformat:"FF_PRI_GUID"\n",
FF_ARG_GUID(subformat));
}
}

int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
{
int id;

id = avio_rl16(pb);
codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec->channels = avio_rl16(pb);
codec->sample_rate = avio_rl32(pb);
codec->bit_rate = avio_rl32(pb) * 8;
codec->block_align = avio_rl16(pb);
if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
codec->bits_per_coded_sample = 8;
} else
codec->bits_per_coded_sample = avio_rl16(pb);
if (id == 0xFFFE) {
codec->codec_tag = 0;
} else {
codec->codec_tag = id;
codec->codec_id = ff_wav_codec_get_id(id,
codec->bits_per_coded_sample);
}
if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
int cbSize = avio_rl16(pb); /* cbSize */
size -= 18;
cbSize = FFMIN(size, cbSize);
if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
parse_waveformatex(pb, codec);
cbSize -= 22;
size -= 22;
}
codec->extradata_size = cbSize;
if (cbSize > 0) {
av_free(codec->extradata);
codec->extradata = av_mallocz(codec->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!codec->extradata)
return AVERROR(ENOMEM);
avio_read(pb, codec->extradata, codec->extradata_size);
size -= cbSize;
}

/* It is possible for the chunk to contain garbage at the end */
if (size > 0)
avio_skip(pb, size);
}
if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
/* Channels and sample_rate values are those prior to applying SBR
* and/or PS. */
codec->channels = 0;
codec->sample_rate = 0;
}
/* override bits_per_coded_sample for G.726 */
if (codec->codec_id == AV_CODEC_ID_ADPCM_G726 && codec->sample_rate)
codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;

return 0;
}

enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
{
enum AVCodecID id;
id = ff_codec_get_id(ff_codec_wav_tags, tag);
if (id <= 0)
return id;

if (id == AV_CODEC_ID_PCM_S16LE)
id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
else if (id == AV_CODEC_ID_PCM_F32LE)
id = ff_get_pcm_codec_id(bps, 1, 0, 0);

if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
id = AV_CODEC_ID_PCM_ZORK;
return id;
}

int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
{
int tag1;
if(esize) *esize = avio_rl32(pb);
else avio_rl32(pb);
st->codec->width = avio_rl32(pb);
st->codec->height = (int32_t)avio_rl32(pb);
avio_rl16(pb); /* planes */
st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
tag1 = avio_rl32(pb);
avio_rl32(pb); /* ImageSize */
avio_rl32(pb); /* XPelsPerMeter */
avio_rl32(pb); /* YPelsPerMeter */
avio_rl32(pb); /* ClrUsed */
avio_rl32(pb); /* ClrImportant */
return tag1;
}

int ff_read_riff_info(AVFormatContext *s, int64_t size)
{
int64_t start, end, cur;
AVIOContext *pb = s->pb;

start = avio_tell(pb);
end = start + size;

while ((cur = avio_tell(pb)) >= 0 &&
cur <= end - 8 /* = tag + size */) {
uint32_t chunk_code;
int64_t chunk_size;
char key[5] = { 0 };
char *value;

chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (url_feof(pb)) {
if (chunk_code || chunk_size) {
av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
return AVERROR_INVALIDDATA;
}
return AVERROR_EOF;
}
if (chunk_size > end ||
end - chunk_size < cur ||
chunk_size == UINT_MAX) {
avio_seek(pb, -9, SEEK_CUR);
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
return AVERROR_INVALIDDATA;
}
}

chunk_size += (chunk_size & 1);

if (!chunk_code) {
if (chunk_size)
avio_skip(pb, chunk_size);
else if (pb->eof_reached) {
av_log(s, AV_LOG_WARNING, "truncated file\n");
return AVERROR_EOF;
}
continue;
}

value = av_mallocz(chunk_size + 1);
if (!value) {
av_log(s, AV_LOG_ERROR,
"out of memory, unable to read INFO tag\n");
return AVERROR(ENOMEM);
}

AV_WL32(key, chunk_code);

if (avio_read(pb, value, chunk_size) != chunk_size) {
av_log(s, AV_LOG_WARNING,
"premature end of file while reading INFO tag\n");
}

av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
}

return 0;
}

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