move common stuff from avienc.c and wav.c to new file riff.c

Originally committed as revision 5720 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 452 insertions, 0 deletions

diff --git a/libavformat/riff.c b/libavformat/riff.c
new file mode 100644
index 0000000000..8f0d030d98
--- /dev/null
+++ b/libavformat/riff.c
@@ -0,0 +1,452 @@
+/*
+ * RIFF codec tags
+ * Copyright (c) 2000 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avformat.h"
+#include "avcodec.h"
+#include "riff.h"
+
+/* Note: when encoding, the first matching tag is used, so order is
+   important if multiple tags possible for a given codec. */
+const CodecTag codec_bmp_tags[] = {
+    { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
+    { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
+
+    { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
+    { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
+    { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
+    { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
+    { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
+
+    { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4')},
+    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
+    { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
+    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
+    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
+    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
+    { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
+
+    /* added based on MPlayer */
+    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
+    { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
+    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
+    { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
+    { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
+    { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
+
+    { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
+
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
+    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
+
+    { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
+
+    { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
+
+    { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
+    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
+    { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
+    { CODEC_ID_MPEG1VIDEO, 0x10000001 },
+    { CODEC_ID_MPEG2VIDEO, 0x10000002 },
+    { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
+    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
+    { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
+    { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
+    { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
+    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
+    { CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
+    { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
+    { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
+    { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
+    { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
+    { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
+    { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
+    { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
+    { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
+    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
+    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
+    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
+    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
+    { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
+    { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
+    { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
+    { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
+    { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
+    { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
+    { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
+    { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
+    { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
+    { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
+    { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
+    { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
+    { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
+    { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
+    { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
+    { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
+    { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
+    { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
+    { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
+    { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
+    { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
+    { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
+    { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
+    { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
+    { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
+    { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
+    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
+    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
+    { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
+    { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
+    { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
+    { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
+    { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
+    { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
+    { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
+    { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
+    { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
+    { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
+    { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
+    { CODEC_ID_RAWVIDEO, 0 },
+    { CODEC_ID_NONE, 0 },
+};
+
+const CodecTag codec_wav_tags[] = {
+    { CODEC_ID_MP2, 0x50 },
+    { CODEC_ID_MP3, 0x55 },
+    { CODEC_ID_AC3, 0x2000 },
+    { CODEC_ID_DTS, 0x2001 },
+    { CODEC_ID_PCM_S16LE, 0x01 },
+    { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
+    { CODEC_ID_PCM_S24LE, 0x01 },
+    { CODEC_ID_PCM_S32LE, 0x01 },
+    { CODEC_ID_PCM_ALAW, 0x06 },
+    { CODEC_ID_PCM_MULAW, 0x07 },
+    { CODEC_ID_ADPCM_MS, 0x02 },
+    { CODEC_ID_ADPCM_IMA_WAV, 0x11 },
+    { CODEC_ID_ADPCM_YAMAHA, 0x20 },
+    { CODEC_ID_ADPCM_G726, 0x45 },
+    { CODEC_ID_ADPCM_IMA_DK4, 0x61 },  /* rogue format number */
+    { CODEC_ID_ADPCM_IMA_DK3, 0x62 },  /* rogue format number */
+    { CODEC_ID_WMAV1, 0x160 },
+    { CODEC_ID_WMAV2, 0x161 },
+    { CODEC_ID_AAC, 0x706d },
+    { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
+    { CODEC_ID_SONIC, 0x2048 },
+    { CODEC_ID_SONIC_LS, 0x2048 },
+    { CODEC_ID_ADPCM_CT, 0x200 },
+    { CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
+    { CODEC_ID_TRUESPEECH, 0x22 },
+
+    // for NuppelVideo (nuv.c)
+    { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
+    { CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
+    { 0, 0 },
+};
+
+unsigned int codec_get_tag(const CodecTag *tags, int id)
+{
+    while (tags->id != CODEC_ID_NONE) {
+        if (tags->id == id)
+            return tags->tag;
+        tags++;
+    }
+    return 0;
+}
+
+unsigned int codec_get_asf_tag(const CodecTag *tags, unsigned int id)
+{
+    while (tags->id != CODEC_ID_NONE) {
+        if (!tags->invalid_asf && tags->id == id)
+            return tags->tag;
+        tags++;
+    }
+    return 0;
+}
+
+enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)
+{
+    while (tags->id != CODEC_ID_NONE) {
+        if(   toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)
+           && toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)
+           && toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)
+           && toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))
+            return tags->id;
+        tags++;
+    }
+    return CODEC_ID_NONE;
+}
+
+unsigned int codec_get_bmp_tag(int id)
+{
+    return codec_get_tag(codec_bmp_tags, id);
+}
+
+unsigned int codec_get_wav_tag(int id)
+{
+    return codec_get_tag(codec_wav_tags, id);
+}
+
+enum CodecID codec_get_bmp_id(unsigned int tag)
+{
+    return codec_get_id(codec_bmp_tags, tag);
+}
+
+enum CodecID codec_get_wav_id(unsigned int tag)
+{
+    return codec_get_id(codec_wav_tags, tag);
+}
+
+#ifdef CONFIG_MUXERS
+offset_t start_tag(ByteIOContext *pb, const char *tag)
+{
+    put_tag(pb, tag);
+    put_le32(pb, 0);
+    return url_ftell(pb);
+}
+
+void end_tag(ByteIOContext *pb, offset_t start)
+{
+    offset_t pos;
+
+    pos = url_ftell(pb);
+    url_fseek(pb, start - 4, SEEK_SET);
+    put_le32(pb, (uint32_t)(pos - start));
+    url_fseek(pb, pos, SEEK_SET);
+}
+
+/* WAVEFORMATEX header */
+/* returns the size or -1 on error */
+int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
+{
+    int bps, blkalign, bytespersec;
+    int hdrsize = 18;
+
+    if(!enc->codec_tag || enc->codec_tag > 0xffff)
+       enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
+    if(!enc->codec_tag)
+        return -1;
+
+    put_le16(pb, enc->codec_tag);
+    put_le16(pb, enc->channels);
+    put_le32(pb, enc->sample_rate);
+    if (enc->codec_id == CODEC_ID_PCM_U8 ||
+        enc->codec_id == CODEC_ID_PCM_ALAW ||
+        enc->codec_id == CODEC_ID_PCM_MULAW) {
+        bps = 8;
+    } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
+        bps = 0;
+    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV || enc->codec_id == CODEC_ID_ADPCM_MS || enc->codec_id == CODEC_ID_ADPCM_G726 || enc->codec_id == CODEC_ID_ADPCM_YAMAHA) { //
+        bps = 4;
+    } else if (enc->codec_id == CODEC_ID_PCM_S24LE) {
+        bps = 24;
+    } else if (enc->codec_id == CODEC_ID_PCM_S32LE) {
+        bps = 32;
+    } else {
+        bps = 16;
+    }
+
+    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
+        blkalign = enc->frame_size; //this is wrong, but seems many demuxers dont work if this is set correctly
+        //blkalign = 144 * enc->bit_rate/enc->sample_rate;
+    } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
+        blkalign = 1;
+    } else if (enc->block_align != 0) { /* specified by the codec */
+        blkalign = enc->block_align;
+    } else
+        blkalign = enc->channels*bps >> 3;
+    if (enc->codec_id == CODEC_ID_PCM_U8 ||
+        enc->codec_id == CODEC_ID_PCM_S24LE ||
+        enc->codec_id == CODEC_ID_PCM_S32LE ||
+        enc->codec_id == CODEC_ID_PCM_S16LE) {
+        bytespersec = enc->sample_rate * blkalign;
+    } else {
+        bytespersec = enc->bit_rate / 8;
+    }
+    put_le32(pb, bytespersec); /* bytes per second */
+    put_le16(pb, blkalign); /* block align */
+    put_le16(pb, bps); /* bits per sample */
+    if (enc->codec_id == CODEC_ID_MP3) {
+        put_le16(pb, 12); /* wav_extra_size */
+        hdrsize += 12;
+        put_le16(pb, 1); /* wID */
+        put_le32(pb, 2); /* fdwFlags */
+        put_le16(pb, 1152); /* nBlockSize */
+        put_le16(pb, 1); /* nFramesPerBlock */
+        put_le16(pb, 1393); /* nCodecDelay */
+    } else if (enc->codec_id == CODEC_ID_MP2) {
+        put_le16(pb, 22); /* wav_extra_size */
+        hdrsize += 22;
+        put_le16(pb, 2);  /* fwHeadLayer */
+        put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
+        put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
+        put_le16(pb, 0);  /* fwHeadModeExt */
+        put_le16(pb, 1);  /* wHeadEmphasis */
+        put_le16(pb, 16); /* fwHeadFlags */
+        put_le32(pb, 0);  /* dwPTSLow */
+        put_le32(pb, 0);  /* dwPTSHigh */
+    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
+        put_le16(pb, 2); /* wav_extra_size */
+        hdrsize += 2;
+        put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */
+    } else if(enc->extradata_size){
+        put_le16(pb, enc->extradata_size);
+        put_buffer(pb, enc->extradata, enc->extradata_size);
+        hdrsize += enc->extradata_size;
+        if(hdrsize&1){
+            hdrsize++;
+            put_byte(pb, 0);
+        }
+    } else {
+        hdrsize -= 2;
+    }
+
+    return hdrsize;
+}
+
+/* BITMAPINFOHEADER header */
+void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
+{
+    put_le32(pb, 40 + enc->extradata_size); /* size */
+    put_le32(pb, enc->width);
+    put_le32(pb, enc->height);
+    put_le16(pb, 1); /* planes */
+
+    put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */
+    /* compression type */
+    put_le32(pb, for_asf ? (enc->codec_tag ? enc->codec_tag : codec_get_asf_tag(tags, enc->codec_id)) : enc->codec_tag); //
+    put_le32(pb, enc->width * enc->height * 3);
+    put_le32(pb, 0);
+    put_le32(pb, 0);
+    put_le32(pb, 0);
+    put_le32(pb, 0);
+
+    put_buffer(pb, enc->extradata, enc->extradata_size);
+
+    if (enc->extradata_size & 1)
+        put_byte(pb, 0);
+}
+#endif //CONFIG_MUXERS
+
+#ifdef 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.
+ */
+void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
+{
+    int id;
+
+    id = get_le16(pb);
+    codec->codec_type = CODEC_TYPE_AUDIO;
+    codec->codec_tag = id;
+    codec->channels = get_le16(pb);
+    codec->sample_rate = get_le32(pb);
+    codec->bit_rate = get_le32(pb) * 8;
+    codec->block_align = get_le16(pb);
+    if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
+        codec->bits_per_sample = 8;
+    }else
+        codec->bits_per_sample = get_le16(pb);
+    codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
+
+    if (size > 16) {  /* We're obviously dealing with WAVEFORMATEX */
+        codec->extradata_size = get_le16(pb);
+        if (codec->extradata_size > 0) {
+            if (codec->extradata_size > size - 18)
+                codec->extradata_size = size - 18;
+            codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+            get_buffer(pb, codec->extradata, codec->extradata_size);
+        } else
+            codec->extradata_size = 0;
+
+        /* It is possible for the chunk to contain garbage at the end */
+        if (size - codec->extradata_size - 18 > 0)
+            url_fskip(pb, size - codec->extradata_size - 18);
+    }
+}
+
+
+int wav_codec_get_id(unsigned int tag, int bps)
+{
+    int id;
+    id = codec_get_id(codec_wav_tags, tag);
+    if (id <= 0)
+        return id;
+    /* handle specific u8 codec */
+    if (id == CODEC_ID_PCM_S16LE && bps == 8)
+        id = CODEC_ID_PCM_U8;
+    if (id == CODEC_ID_PCM_S16LE && bps == 24)
+        id = CODEC_ID_PCM_S24LE;
+    if (id == CODEC_ID_PCM_S16LE && bps == 32)
+        id = CODEC_ID_PCM_S32LE;
+    return id;
+}
+#endif // CONFIG_DEMUXERS
+
+void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
+{
+    int gcd;
+
+    *au_ssize= stream->block_align;
+    if(stream->frame_size && stream->sample_rate){
+        *au_scale=stream->frame_size;
+        *au_rate= stream->sample_rate;
+    }else if(stream->codec_type == CODEC_TYPE_VIDEO){
+        *au_scale= stream->time_base.num;
+        *au_rate = stream->time_base.den;
+    }else{
+        *au_scale= stream->block_align ? stream->block_align*8 : 8;
+        *au_rate = stream->bit_rate;
+    }
+    gcd= ff_gcd(*au_scale, *au_rate);
+    *au_scale /= gcd;
+    *au_rate /= gcd;
+}