mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 20234 to svn://svn.ffmpeg.org/ffmpeg/trunkrelease/0.6
Justin Ruggles
15 years ago
parent
686884da9d
commit
47b47bbdaf
4 changed files with 217 additions and 167 deletions
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/*
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* AIFF/AIFF-C muxer/demuxer common header |
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* Copyright (c) 2006 Patrick Guimond |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file libavformat/aiff.h |
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* common header for AIFF muxer and demuxer |
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*/ |
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#ifndef AVFORMAT_AIFF_H |
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#define AVFORMAT_AIFF_H |
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#include "avformat.h" |
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#include "riff.h" |
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static const AVCodecTag ff_codec_aiff_tags[] = { |
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{ CODEC_ID_PCM_S16BE, MKTAG('N','O','N','E') }, |
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{ CODEC_ID_PCM_S8, MKTAG('N','O','N','E') }, |
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{ CODEC_ID_PCM_S24BE, MKTAG('N','O','N','E') }, |
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{ CODEC_ID_PCM_S32BE, MKTAG('N','O','N','E') }, |
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{ CODEC_ID_PCM_F32BE, MKTAG('f','l','3','2') }, |
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{ CODEC_ID_PCM_F64BE, MKTAG('f','l','6','4') }, |
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{ CODEC_ID_PCM_ALAW, MKTAG('a','l','a','w') }, |
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{ CODEC_ID_PCM_MULAW, MKTAG('u','l','a','w') }, |
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{ CODEC_ID_MACE3, MKTAG('M','A','C','3') }, |
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{ CODEC_ID_MACE6, MKTAG('M','A','C','6') }, |
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{ CODEC_ID_GSM, MKTAG('G','S','M',' ') }, |
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{ CODEC_ID_ADPCM_G726, MKTAG('G','7','2','6') }, |
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{ CODEC_ID_PCM_S16LE, MKTAG('s','o','w','t') }, |
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{ CODEC_ID_ADPCM_IMA_QT, MKTAG('i','m','a','4') }, |
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{ CODEC_ID_QDM2, MKTAG('Q','D','M','2') }, |
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{ 0, 0 }, |
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}; |
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#endif /* AVFORMAT_AIFF_H */ |
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/*
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* AIFF/AIFF-C muxer |
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* Copyright (c) 2006 Patrick Guimond |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avformat.h" |
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#include "aiff.h" |
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typedef struct { |
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int64_t form; |
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int64_t frames; |
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int64_t ssnd; |
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} AIFFOutputContext; |
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static int aiff_write_header(AVFormatContext *s) |
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{ |
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AIFFOutputContext *aiff = s->priv_data; |
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ByteIOContext *pb = s->pb; |
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AVCodecContext *enc = s->streams[0]->codec; |
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AVExtFloat sample_rate; |
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int aifc = 0; |
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/* First verify if format is ok */ |
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if (!enc->codec_tag) |
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return -1; |
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if (enc->codec_tag != MKTAG('N','O','N','E')) |
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aifc = 1; |
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/* FORM AIFF header */ |
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put_tag(pb, "FORM"); |
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aiff->form = url_ftell(pb); |
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put_be32(pb, 0); /* file length */ |
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put_tag(pb, aifc ? "AIFC" : "AIFF"); |
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if (aifc) { // compressed audio
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enc->bits_per_coded_sample = 16; |
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if (!enc->block_align) { |
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av_log(s, AV_LOG_ERROR, "block align not set\n"); |
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return -1; |
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} |
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/* Version chunk */ |
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put_tag(pb, "FVER"); |
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put_be32(pb, 4); |
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put_be32(pb, 0xA2805140); |
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} |
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/* Common chunk */ |
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put_tag(pb, "COMM"); |
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put_be32(pb, aifc ? 24 : 18); /* size */ |
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put_be16(pb, enc->channels); /* Number of channels */ |
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aiff->frames = url_ftell(pb); |
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put_be32(pb, 0); /* Number of frames */ |
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if (!enc->bits_per_coded_sample) |
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enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id); |
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if (!enc->bits_per_coded_sample) { |
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av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n"); |
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return -1; |
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} |
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if (!enc->block_align) |
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enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3; |
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put_be16(pb, enc->bits_per_coded_sample); /* Sample size */ |
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sample_rate = av_dbl2ext((double)enc->sample_rate); |
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put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate)); |
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if (aifc) { |
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put_le32(pb, enc->codec_tag); |
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put_be16(pb, 0); |
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} |
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/* Sound data chunk */ |
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put_tag(pb, "SSND"); |
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aiff->ssnd = url_ftell(pb); /* Sound chunk size */ |
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put_be32(pb, 0); /* Sound samples data size */ |
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put_be32(pb, 0); /* Data offset */ |
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put_be32(pb, 0); /* Block-size (block align) */ |
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av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate); |
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/* Data is starting here */ |
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put_flush_packet(pb); |
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return 0; |
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} |
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static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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ByteIOContext *pb = s->pb; |
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put_buffer(pb, pkt->data, pkt->size); |
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return 0; |
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} |
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static int aiff_write_trailer(AVFormatContext *s) |
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{ |
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ByteIOContext *pb = s->pb; |
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AIFFOutputContext *aiff = s->priv_data; |
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AVCodecContext *enc = s->streams[0]->codec; |
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/* Chunks sizes must be even */ |
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int64_t file_size, end_size; |
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end_size = file_size = url_ftell(pb); |
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if (file_size & 1) { |
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put_byte(pb, 0); |
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end_size++; |
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} |
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if (!url_is_streamed(s->pb)) { |
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/* File length */ |
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url_fseek(pb, aiff->form, SEEK_SET); |
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put_be32(pb, file_size - aiff->form - 4); |
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/* Number of sample frames */ |
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url_fseek(pb, aiff->frames, SEEK_SET); |
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put_be32(pb, (file_size-aiff->ssnd-12)/enc->block_align); |
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/* Sound Data chunk size */ |
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url_fseek(pb, aiff->ssnd, SEEK_SET); |
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put_be32(pb, file_size - aiff->ssnd - 4); |
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/* return to the end */ |
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url_fseek(pb, end_size, SEEK_SET); |
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put_flush_packet(pb); |
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} |
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return 0; |
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} |
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AVOutputFormat aiff_muxer = { |
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"aiff", |
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NULL_IF_CONFIG_SMALL("Audio IFF"), |
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"audio/aiff", |
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"aif,aiff,afc,aifc", |
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sizeof(AIFFOutputContext), |
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CODEC_ID_PCM_S16BE, |
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CODEC_ID_NONE, |
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aiff_write_header, |
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aiff_write_packet, |
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aiff_write_trailer, |
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.codec_tag= (const AVCodecTag* const []){ff_codec_aiff_tags, 0}, |
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}; |
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