diff options
Diffstat (limited to 'libavformat/cafenc.c')
| -rw-r--r-- | libavformat/cafenc.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/libavformat/cafenc.c b/libavformat/cafenc.c new file mode 100644 index 0000000000..11bb055965 --- /dev/null +++ b/libavformat/cafenc.c @@ -0,0 +1,279 @@ +/* + * 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) { + 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_MP2: + case AV_CODEC_ID_MP3: + return 1152; + case AV_CODEC_ID_AC3: + return 1536; + case AV_CODEC_ID_ALAC: + case AV_CODEC_ID_QDM2: + return 4096; + case AV_CODEC_ID_ADPCM_IMA_WAV: + return (1024 - 4 * channels) * 8 / (4 * channels) + 1; + case AV_CODEC_ID_ADPCM_MS: + return (1024 - 7 * channels) * 2 / channels + 2; + default: + return 0; + } +} + +static int caf_write_header(AVFormatContext *s) +{ + AVIOContext *pb = s->pb; + AVCodecContext *enc = s->streams[0]->codec; + CAFContext *caf = s->priv_data; + AVDictionaryEntry *t = NULL; + unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, enc->codec_id); + int64_t chunk_size = 0; + + switch (enc->codec_id) { + case AV_CODEC_ID_AAC: + case AV_CODEC_ID_AC3: + av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n"); + return AVERROR_PATCHWELCOME; + } + + switch (enc->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: + codec_tag = MKTAG('l','p','c','m'); + } + + if (!codec_tag) { + av_log(s, AV_LOG_ERROR, "unsupported codec\n"); + return AVERROR_INVALIDDATA; + } + + if (!enc->block_align && !pb->seekable) { + av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n"); + return AVERROR_INVALIDDATA; + } + + 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(enc->sample_rate)); //< mSampleRate + avio_wl32(pb, codec_tag); //< mFormatID + avio_wb32(pb, codec_flags(enc->codec_id)); //< mFormatFlags + avio_wb32(pb, enc->block_align); //< mBytesPerPacket + avio_wb32(pb, samples_per_packet(enc->codec_id, enc->channels)); //< mFramesPerPacket + avio_wb32(pb, enc->channels); //< mChannelsPerFrame + avio_wb32(pb, av_get_bits_per_sample(enc->codec_id)); //< mBitsPerChannel + + if (enc->channel_layout) { + ffio_wfourcc(pb, "chan"); + avio_wb64(pb, 12); + ff_mov_write_chan(pb, enc->channel_layout); + } + + if (enc->codec_id == AV_CODEC_ID_ALAC) { + ffio_wfourcc(pb, "kuki"); + avio_wb64(pb, 12 + enc->extradata_size); + avio_write(pb, "\0\0\0\14frmaalac", 12); + avio_write(pb, enc->extradata, enc->extradata_size); + } else if (enc->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 (enc->codec_id == AV_CODEC_ID_QDM2) { + ffio_wfourcc(pb, "kuki"); + avio_wb64(pb, enc->extradata_size); + avio_write(pb, enc->extradata, enc->extradata_size); + } + + 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 + + avio_flush(pb); + 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]->codec->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; + AVCodecContext *enc = s->streams[0]->codec; + + if (pb->seekable) { + 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 (!enc->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(enc->codec_id, enc->channels)); ///< 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; + } + avio_flush(pb); + } + 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}, +}; |