---
libavformat/Makefile | 26 +++---
libavformat/riff.c | 204 -------------------------------------------
libavformat/riffdec.c | 229 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 242 insertions(+), 217 deletions(-)
create mode 100644 libavformat/riffdec.c
diff --git a/libavformat/Makefile b/libavformat/Makefile
index f0b7133..f5573bd 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -65,15 +65,15 @@ OBJS-$(CONFIG_ANM_DEMUXER) += anm.o
OBJS-$(CONFIG_APC_DEMUXER) += apc.o
OBJS-$(CONFIG_APE_DEMUXER) += ape.o apetag.o img2.o
OBJS-$(CONFIG_ASF_DEMUXER) += asfdec.o asf.o asfcrypt.o \
- avlanguage.o
+ avlanguage.o riffdec.o
OBJS-$(CONFIG_ASF_MUXER) += asfenc.o asf.o riffenc.o
OBJS-$(CONFIG_ASS_DEMUXER) += assdec.o
OBJS-$(CONFIG_ASS_MUXER) += assenc.o
OBJS-$(CONFIG_AU_DEMUXER) += au.o pcm.o
OBJS-$(CONFIG_AU_MUXER) += au.o rawenc.o
-OBJS-$(CONFIG_AVI_DEMUXER) += avidec.o
+OBJS-$(CONFIG_AVI_DEMUXER) += avidec.o riffdec.o
OBJS-$(CONFIG_AVI_MUXER) += avienc.o riffenc.o
-OBJS-$(CONFIG_AVISYNTH) += avisynth.o
+OBJS-$(CONFIG_AVISYNTH) += avisynth.o riffdec.o
OBJS-$(CONFIG_AVM2_MUXER) += swfenc.o swf.o
OBJS-$(CONFIG_AVS_DEMUXER) += avs.o vocdec.o voc.o
OBJS-$(CONFIG_BETHSOFTVID_DEMUXER) += bethsoftvid.o
@@ -82,7 +82,7 @@ OBJS-$(CONFIG_BINK_DEMUXER) += bink.o
OBJS-$(CONFIG_BMV_DEMUXER) += bmv.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o vocdec.o voc.o
OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o mov_chan.o \
- isom.o
+ isom.o riffdec.o
OBJS-$(CONFIG_CAVSVIDEO_DEMUXER) += cavsvideodec.o rawdec.o
OBJS-$(CONFIG_CAVSVIDEO_MUXER) += rawenc.o
OBJS-$(CONFIG_CDG_DEMUXER) += cdg.o
@@ -100,7 +100,7 @@ OBJS-$(CONFIG_DTS_DEMUXER) += dtsdec.o
rawdec.o
OBJS-$(CONFIG_DTS_MUXER) += rawenc.o
OBJS-$(CONFIG_DV_DEMUXER) += dv.o
OBJS-$(CONFIG_DV_MUXER) += dvenc.o
-OBJS-$(CONFIG_DXA_DEMUXER) += dxa.o
+OBJS-$(CONFIG_DXA_DEMUXER) += dxa.o riffdec.o
OBJS-$(CONFIG_EA_CDATA_DEMUXER) += eacdata.o
OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o
OBJS-$(CONFIG_EAC3_DEMUXER) += ac3dec.o rawdec.o
@@ -159,7 +159,7 @@ OBJS-$(CONFIG_LXF_DEMUXER) += lxfdec.o
OBJS-$(CONFIG_M4V_DEMUXER) += m4vdec.o rawdec.o
OBJS-$(CONFIG_M4V_MUXER) += rawenc.o
OBJS-$(CONFIG_MATROSKA_DEMUXER) += matroskadec.o matroska.o \
- isom.o rmsipr.o
+ isom.o rmsipr.o riffdec.o
OBJS-$(CONFIG_MATROSKA_MUXER) += matroskaenc.o matroska.o \
isom.o avc.o riffenc.o \
flacenc_header.o avlanguage.o wv.o
@@ -171,7 +171,7 @@ OBJS-$(CONFIG_MLP_MUXER) += rawenc.o
OBJS-$(CONFIG_MM_DEMUXER) += mm.o
OBJS-$(CONFIG_MMF_DEMUXER) += mmf.o pcm.o
OBJS-$(CONFIG_MMF_MUXER) += mmf.o riffenc.o
-OBJS-$(CONFIG_MOV_DEMUXER) += mov.o isom.o mov_chan.o
+OBJS-$(CONFIG_MOV_DEMUXER) += mov.o isom.o mov_chan.o riffdec.o
OBJS-$(CONFIG_MOV_MUXER) += movenc.o isom.o avc.o \
movenchint.o mov_chan.o riffenc.o
OBJS-$(CONFIG_MP2_MUXER) += mp3enc.o rawenc.o id3v2enc.o
@@ -202,7 +202,7 @@ OBJS-$(CONFIG_NSV_DEMUXER) += nsvdec.o
OBJS-$(CONFIG_NULL_MUXER) += nullenc.o
OBJS-$(CONFIG_NUT_DEMUXER) += nutdec.o nut.o
OBJS-$(CONFIG_NUT_MUXER) += nutenc.o nut.o riffenc.o
-OBJS-$(CONFIG_NUV_DEMUXER) += nuv.o
+OBJS-$(CONFIG_NUV_DEMUXER) += nuv.o riffdec.o
OBJS-$(CONFIG_OGG_DEMUXER) += oggdec.o \
oggparsecelt.o \
oggparsedirac.o \
@@ -325,8 +325,8 @@ OBJS-$(CONFIG_VMD_DEMUXER) += sierravmd.o
OBJS-$(CONFIG_VOC_DEMUXER) += vocdec.o voc.o
OBJS-$(CONFIG_VOC_MUXER) += vocenc.o voc.o
OBJS-$(CONFIG_VQF_DEMUXER) += vqf.o
-OBJS-$(CONFIG_W64_DEMUXER) += wavdec.o pcm.o
-OBJS-$(CONFIG_WAV_DEMUXER) += wavdec.o pcm.o
+OBJS-$(CONFIG_W64_DEMUXER) += wavdec.o pcm.o riffdec.o
+OBJS-$(CONFIG_WAV_DEMUXER) += wavdec.o pcm.o riffdec.o
OBJS-$(CONFIG_WAV_MUXER) += wavenc.o riffenc.o
OBJS-$(CONFIG_WC3_DEMUXER) += wc3movie.o
OBJS-$(CONFIG_WEBM_MUXER) += matroskaenc.o matroska.o \
@@ -335,12 +335,12 @@ OBJS-$(CONFIG_WEBM_MUXER) += matroskaenc.o
matroska.o \
OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood_aud.o
OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood_vqa.o
OBJS-$(CONFIG_WTV_DEMUXER) += wtv.o asfdec.o asf.o asfcrypt.o \
- avlanguage.o mpegts.o isom.o
+ avlanguage.o mpegts.o isom.o
riffdec.o
OBJS-$(CONFIG_WV_DEMUXER) += wvdec.o wv.o apetag.o img2.o
OBJS-$(CONFIG_WV_MUXER) += wvenc.o wv.o apetag.o
OBJS-$(CONFIG_XA_DEMUXER) += xa.o
-OBJS-$(CONFIG_XMV_DEMUXER) += xmv.o
-OBJS-$(CONFIG_XWMA_DEMUXER) += xwma.o
+OBJS-$(CONFIG_XMV_DEMUXER) += xmv.o riffdec.o
+OBJS-$(CONFIG_XWMA_DEMUXER) += xwma.o riffdec.o
OBJS-$(CONFIG_YOP_DEMUXER) += yop.o
OBJS-$(CONFIG_YUV4MPEGPIPE_MUXER) += yuv4mpeg.o
OBJS-$(CONFIG_YUV4MPEGPIPE_DEMUXER) += yuv4mpeg.o
diff --git a/libavformat/riff.c b/libavformat/riff.c
index fdee064..6fe310a 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -20,12 +20,9 @@
*/
#include "libavutil/error.h"
-#include "libavutil/log.h"
#include "libavcodec/avcodec.h"
#include "avformat.h"
-#include "avio_internal.h"
#include "riff.h"
-#include "libavcodec/bytestream.h"
/* Note: When encoding, the first matching tag is used, so order is
* important if multiple tags are possible for a given codec. */
@@ -380,14 +377,6 @@ const AVCodecTag ff_codec_wav_tags[] = {
{ 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[] = {
{ "IART", "artist" },
{ "ICMT", "comment" },
@@ -403,15 +392,6 @@ const AVMetadataConv ff_riff_info_conv[] = {
{ 0 },
};
-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)
{
return ff_codec_bmp_tags;
@@ -421,187 +401,3 @@ const struct AVCodecTag
*avformat_get_riff_audio_tags(void)
{
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;
- c->bits_per_coded_sample = avio_rl16(pb);
- 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->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)
-{
- int tag1;
- avio_rl32(pb); /* size */
- 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 (chunk_size > end ||
- end - chunk_size < cur ||
- chunk_size == UINT_MAX) {
- av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
- break;
- }
-
- 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_malloc(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_free(value);
- av_log(s, AV_LOG_WARNING,
- "premature end of file while reading INFO tag\n");
- break;
- }
-
- value[chunk_size] = 0;
-
- av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
- }
-
- return 0;
-}
-#endif /* CONFIG_DEMUXERS */
diff --git a/libavformat/riffdec.c b/libavformat/riffdec.c
new file mode 100644
index 0000000..447a686
--- /dev/null
+++ b/libavformat/riffdec.c
@@ -0,0 +1,229 @@
+/*
+ * RIFF demuxing functions and data
+ * Copyright (c) 2000 Fabrice Bellard
+ *
+ * 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 "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 }
+};
+
+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;
+ c->bits_per_coded_sample = avio_rl16(pb);
+ 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->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)
+{
+ int tag1;
+ avio_rl32(pb); /* size */
+ 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 (chunk_size > end ||
+ end - chunk_size < cur ||
+ chunk_size == UINT_MAX) {
+ av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
+ break;
+ }
+
+ 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_malloc(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_free(value);
+ av_log(s, AV_LOG_WARNING,
+ "premature end of file while reading INFO tag\n");
+ break;
+ }
+
+ value[chunk_size] = 0;
+
+ av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
+ }
+
+ return 0;
+}
--
1.7.9.5
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