| /* |
| * Core Audio Format muxer |
| * Copyright (c) 2011 Carl Eugen Hoyos |
| * |
| * 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 "caf.h" |
| #include "isom.h" |
| #include "avio_internal.h" |
| #include "libavutil/intfloat.h" |
| #include "libavutil/dict.h" |
| |
| typedef struct { |
| int64_t data; |
| uint8_t *pkt_sizes; |
| int size_buffer_size; |
| int size_entries_used; |
| int packets; |
| } CAFContext; |
| |
| static uint32_t codec_flags(enum AVCodecID codec_id) { |
| switch (codec_id) { |
| case AV_CODEC_ID_PCM_F32BE: |
| case AV_CODEC_ID_PCM_F64BE: |
| return 1; //< kCAFLinearPCMFormatFlagIsFloat |
| case AV_CODEC_ID_PCM_S16LE: |
| case AV_CODEC_ID_PCM_S24LE: |
| case AV_CODEC_ID_PCM_S32LE: |
| return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian |
| case AV_CODEC_ID_PCM_F32LE: |
| case AV_CODEC_ID_PCM_F64LE: |
| return 3; //< kCAFLinearPCMFormatFlagIsFloat | kCAFLinearPCMFormatFlagIsLittleEndian |
| default: |
| return 0; |
| } |
| } |
| |
| static uint32_t samples_per_packet(enum AVCodecID codec_id, int channels, int block_align) { |
| switch (codec_id) { |
| case AV_CODEC_ID_PCM_S8: |
| case AV_CODEC_ID_PCM_S16LE: |
| case AV_CODEC_ID_PCM_S16BE: |
| case AV_CODEC_ID_PCM_S24LE: |
| case AV_CODEC_ID_PCM_S24BE: |
| case AV_CODEC_ID_PCM_S32LE: |
| case AV_CODEC_ID_PCM_S32BE: |
| case AV_CODEC_ID_PCM_F32LE: |
| case AV_CODEC_ID_PCM_F32BE: |
| case AV_CODEC_ID_PCM_F64LE: |
| case AV_CODEC_ID_PCM_F64BE: |
| case AV_CODEC_ID_PCM_ALAW: |
| case AV_CODEC_ID_PCM_MULAW: |
| return 1; |
| case AV_CODEC_ID_MACE3: |
| case AV_CODEC_ID_MACE6: |
| return 6; |
| case AV_CODEC_ID_ADPCM_IMA_QT: |
| return 64; |
| case AV_CODEC_ID_AMR_NB: |
| case AV_CODEC_ID_GSM: |
| case AV_CODEC_ID_ILBC: |
| case AV_CODEC_ID_QCELP: |
| return 160; |
| case AV_CODEC_ID_GSM_MS: |
| return 320; |
| case AV_CODEC_ID_MP1: |
| return 384; |
| case AV_CODEC_ID_OPUS: |
| return 960; |
| case AV_CODEC_ID_MP2: |
| case AV_CODEC_ID_MP3: |
| return 1152; |
| case AV_CODEC_ID_AC3: |
| return 1536; |
| case AV_CODEC_ID_QDM2: |
| case AV_CODEC_ID_QDMC: |
| return 2048 * channels; |
| case AV_CODEC_ID_ALAC: |
| return 4096; |
| case AV_CODEC_ID_ADPCM_IMA_WAV: |
| return (block_align - 4 * channels) * 8 / (4 * channels) + 1; |
| case AV_CODEC_ID_ADPCM_MS: |
| return (block_align - 7 * channels) * 2 / channels + 2; |
| default: |
| return 0; |
| } |
| } |
| |
| static int caf_write_header(AVFormatContext *s) |
| { |
| AVIOContext *pb = s->pb; |
| AVCodecParameters *par = s->streams[0]->codecpar; |
| CAFContext *caf = s->priv_data; |
| AVDictionaryEntry *t = NULL; |
| unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, par->codec_id); |
| int64_t chunk_size = 0; |
| int frame_size = par->frame_size; |
| |
| if (s->nb_streams != 1) { |
| av_log(s, AV_LOG_ERROR, "CAF files have exactly one stream\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| switch (par->codec_id) { |
| case AV_CODEC_ID_AAC: |
| av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (par->codec_id == AV_CODEC_ID_OPUS && par->channels > 2) { |
| av_log(s, AV_LOG_ERROR, "Only mono and stereo are supported for Opus\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (!codec_tag) { |
| av_log(s, AV_LOG_ERROR, "unsupported codec\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (!par->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) { |
| av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (par->codec_id != AV_CODEC_ID_MP3 || frame_size != 576) |
| frame_size = samples_per_packet(par->codec_id, par->channels, par->block_align); |
| |
| ffio_wfourcc(pb, "caff"); //< mFileType |
| avio_wb16(pb, 1); //< mFileVersion |
| avio_wb16(pb, 0); //< mFileFlags |
| |
| ffio_wfourcc(pb, "desc"); //< Audio Description chunk |
| avio_wb64(pb, 32); //< mChunkSize |
| avio_wb64(pb, av_double2int(par->sample_rate)); //< mSampleRate |
| avio_wl32(pb, codec_tag); //< mFormatID |
| avio_wb32(pb, codec_flags(par->codec_id)); //< mFormatFlags |
| avio_wb32(pb, par->block_align); //< mBytesPerPacket |
| avio_wb32(pb, frame_size); //< mFramesPerPacket |
| avio_wb32(pb, par->channels); //< mChannelsPerFrame |
| avio_wb32(pb, av_get_bits_per_sample(par->codec_id)); //< mBitsPerChannel |
| |
| if (par->channel_layout) { |
| ffio_wfourcc(pb, "chan"); |
| avio_wb64(pb, 12); |
| ff_mov_write_chan(pb, par->channel_layout); |
| } |
| |
| if (par->codec_id == AV_CODEC_ID_ALAC) { |
| ffio_wfourcc(pb, "kuki"); |
| avio_wb64(pb, 12 + par->extradata_size); |
| avio_write(pb, "\0\0\0\14frmaalac", 12); |
| avio_write(pb, par->extradata, par->extradata_size); |
| } else if (par->codec_id == AV_CODEC_ID_AMR_NB) { |
| ffio_wfourcc(pb, "kuki"); |
| avio_wb64(pb, 29); |
| avio_write(pb, "\0\0\0\14frmasamr", 12); |
| avio_wb32(pb, 0x11); /* size */ |
| avio_write(pb, "samrFFMP", 8); |
| avio_w8(pb, 0); /* decoder version */ |
| |
| avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */ |
| avio_w8(pb, 0x00); /* Mode change period (no restriction) */ |
| avio_w8(pb, 0x01); /* Frames per sample */ |
| } else if (par->codec_id == AV_CODEC_ID_QDM2 || par->codec_id == AV_CODEC_ID_QDMC) { |
| ffio_wfourcc(pb, "kuki"); |
| avio_wb64(pb, par->extradata_size); |
| avio_write(pb, par->extradata, par->extradata_size); |
| } |
| |
| ff_standardize_creation_time(s); |
| if (av_dict_count(s->metadata)) { |
| ffio_wfourcc(pb, "info"); //< Information chunk |
| while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) { |
| chunk_size += strlen(t->key) + strlen(t->value) + 2; |
| } |
| avio_wb64(pb, chunk_size + 4); |
| avio_wb32(pb, av_dict_count(s->metadata)); |
| t = NULL; |
| while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) { |
| avio_put_str(pb, t->key); |
| avio_put_str(pb, t->value); |
| } |
| } |
| |
| ffio_wfourcc(pb, "data"); //< Audio Data chunk |
| caf->data = avio_tell(pb); |
| avio_wb64(pb, -1); //< mChunkSize |
| avio_wb32(pb, 0); //< mEditCount |
| |
| return 0; |
| } |
| |
| static int caf_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| CAFContext *caf = s->priv_data; |
| |
| avio_write(s->pb, pkt->data, pkt->size); |
| if (!s->streams[0]->codecpar->block_align) { |
| void *pkt_sizes = caf->pkt_sizes; |
| int i, alloc_size = caf->size_entries_used + 5; |
| if (alloc_size < 0) { |
| caf->pkt_sizes = NULL; |
| } else { |
| caf->pkt_sizes = av_fast_realloc(caf->pkt_sizes, |
| &caf->size_buffer_size, |
| alloc_size); |
| } |
| if (!caf->pkt_sizes) { |
| av_free(pkt_sizes); |
| return AVERROR(ENOMEM); |
| } |
| for (i = 4; i > 0; i--) { |
| unsigned top = pkt->size >> i * 7; |
| if (top) |
| caf->pkt_sizes[caf->size_entries_used++] = 128 | top; |
| } |
| caf->pkt_sizes[caf->size_entries_used++] = pkt->size & 127; |
| caf->packets++; |
| } |
| return 0; |
| } |
| |
| static int caf_write_trailer(AVFormatContext *s) |
| { |
| CAFContext *caf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| AVCodecParameters *par = s->streams[0]->codecpar; |
| |
| if (pb->seekable & AVIO_SEEKABLE_NORMAL) { |
| int64_t file_size = avio_tell(pb); |
| |
| avio_seek(pb, caf->data, SEEK_SET); |
| avio_wb64(pb, file_size - caf->data - 8); |
| avio_seek(pb, file_size, SEEK_SET); |
| if (!par->block_align) { |
| ffio_wfourcc(pb, "pakt"); |
| avio_wb64(pb, caf->size_entries_used + 24); |
| avio_wb64(pb, caf->packets); ///< mNumberPackets |
| avio_wb64(pb, caf->packets * samples_per_packet(par->codec_id, par->channels, par->block_align)); ///< mNumberValidFrames |
| avio_wb32(pb, 0); ///< mPrimingFrames |
| avio_wb32(pb, 0); ///< mRemainderFrames |
| avio_write(pb, caf->pkt_sizes, caf->size_entries_used); |
| caf->size_buffer_size = 0; |
| } |
| } |
| av_freep(&caf->pkt_sizes); |
| return 0; |
| } |
| |
| AVOutputFormat ff_caf_muxer = { |
| .name = "caf", |
| .long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"), |
| .mime_type = "audio/x-caf", |
| .extensions = "caf", |
| .priv_data_size = sizeof(CAFContext), |
| .audio_codec = AV_CODEC_ID_PCM_S16BE, |
| .video_codec = AV_CODEC_ID_NONE, |
| .write_header = caf_write_header, |
| .write_packet = caf_write_packet, |
| .write_trailer = caf_write_trailer, |
| .codec_tag = (const AVCodecTag* const []){ff_codec_caf_tags, 0}, |
| }; |
