diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/riff.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/riff.c | 500 |
1 files changed, 0 insertions, 500 deletions
diff --git a/contrib/ffmpeg/libavformat/riff.c b/contrib/ffmpeg/libavformat/riff.c deleted file mode 100644 index 4a5553fa4..000000000 --- a/contrib/ffmpeg/libavformat/riff.c +++ /dev/null @@ -1,500 +0,0 @@ -/* - * RIFF codec tags - * 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 "avformat.h" -#include "avcodec.h" -#include "riff.h" -#include "allformats.h" // for asf_muxer - -/* Note: when encoding, the first matching tag is used, so order is - important if multiple tags possible for a given codec. */ -const AVCodecTag 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') }, - { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') }, - { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') }, - { 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') }, /* 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_MJPEG, MKTAG('j', 'p', 'e', 'g') }, - { CODEC_ID_MJPEG, MKTAG('I', 'J', 'P', 'G') }, - { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, - { 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, 0 }, - { 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('Y', 'V', '1', '2') }, - { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') }, - { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') }, - { CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') }, - { 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_VP5, MKTAG('V', 'P', '5', '0') }, - { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') }, - { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') }, - { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') }, - { 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_VP6F, MKTAG('V', 'P', '6', 'F') }, - { 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_VC1, MKTAG('W', 'V', 'C', '1') }, - { CODEC_ID_VC1, MKTAG('W', 'M', 'V', 'A') }, - { 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_CAVS, MKTAG('C', 'A', 'V', 'S') }, - { CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') }, - { CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') }, - { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, - { CODEC_ID_NONE, 0 }, -}; - -const AVCodecTag 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_AAC, 0xff }, - { 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 }, - { CODEC_ID_FLAC, 0xF1AC }, - { CODEC_ID_IMC, 0x401 }, - { CODEC_ID_GSM_MS, 0x31 }, - - /* FIXME: All of the IDs below are not 16 bit and thus illegal. */ - // for NuppelVideo (nuv.c) - { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') }, - { CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') }, - { CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') }, - { 0, 0 }, -}; - -unsigned int codec_get_tag(const AVCodecTag *tags, int id) -{ - while (tags->id != CODEC_ID_NONE) { - if (tags->id == id) - return tags->tag; - tags++; - } - return 0; -} - -enum CodecID codec_get_id(const AVCodecTag *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 av_codec_get_tag(const AVCodecTag *tags[4], enum CodecID id) -{ - int i; - for(i=0; tags && tags[i]; i++){ - int tag= codec_get_tag(tags[i], id); - if(tag) return tag; - } - return 0; -} - -enum CodecID av_codec_get_id(const AVCodecTag *tags[4], unsigned int tag) -{ - int i; - for(i=0; tags && tags[i]; i++){ - enum CodecID id= codec_get_id(tags[i], tag); - if(id!=CODEC_ID_NONE) return id; - } - 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) - 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 || enc->codec_id == CODEC_ID_GSM_MS) { - 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(bps != enc->bits_per_sample && enc->bits_per_sample){ - av_log(enc, AV_LOG_WARNING, "requested bits_per_sample (%d) and actually stored (%d) differ\n", enc->bits_per_sample, bps); - } - - if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS) { - 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_GSM_MS) { - put_le16(pb, 2); /* wav_extra_size */ - hdrsize += 2; - put_le16(pb, enc->frame_size); /* wSamplesPerBlock */ - } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) { - put_le16(pb, 2); /* wav_extra_size */ - hdrsize += 2; - put_le16(pb, enc->frame_size); /* 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 AVCodecTag *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, 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); - if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */ - int cbSize = get_le16(pb); /* cbSize */ - size -= 18; - cbSize = FFMIN(size, cbSize); - if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */ - codec->bits_per_sample = get_le16(pb); - get_le32(pb); /* dwChannelMask */ - id = get_le32(pb); /* 4 first bytes of GUID */ - url_fskip(pb, 12); /* skip end of GUID */ - cbSize -= 22; - size -= 22; - } - codec->extradata_size = cbSize; - if (cbSize > 0) { - codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); - get_buffer(pb, codec->extradata, codec->extradata_size); - size -= cbSize; - } - - /* It is possible for the chunk to contain garbage at the end */ - if (size > 0) - url_fskip(pb, size); - } - codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample); -} - - -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; -} |