| /* |
| * AIFF/AIFF-C muxer and demuxer |
| * Copyright (c) 2006 Patrick Guimond |
| * |
| * 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 "libavutil/intfloat_readwrite.h" |
| #include "avformat.h" |
| #include "raw.h" |
| #include "riff.h" |
| |
| static const AVCodecTag codec_aiff_tags[] = { |
| { CODEC_ID_PCM_S16BE, MKTAG('N','O','N','E') }, |
| { CODEC_ID_PCM_S8, MKTAG('N','O','N','E') }, |
| { CODEC_ID_PCM_S24BE, MKTAG('N','O','N','E') }, |
| { CODEC_ID_PCM_S32BE, MKTAG('N','O','N','E') }, |
| { CODEC_ID_PCM_F32BE, MKTAG('f','l','3','2') }, |
| { CODEC_ID_PCM_F64BE, MKTAG('f','l','6','4') }, |
| { CODEC_ID_PCM_ALAW, MKTAG('a','l','a','w') }, |
| { CODEC_ID_PCM_MULAW, MKTAG('u','l','a','w') }, |
| { CODEC_ID_MACE3, MKTAG('M','A','C','3') }, |
| { CODEC_ID_MACE6, MKTAG('M','A','C','6') }, |
| { CODEC_ID_GSM, MKTAG('G','S','M',' ') }, |
| { CODEC_ID_ADPCM_G726, MKTAG('G','7','2','6') }, |
| { CODEC_ID_PCM_S16LE, MKTAG('s','o','w','t') }, |
| { CODEC_ID_ADPCM_IMA_QT, MKTAG('i','m','a','4') }, |
| { CODEC_ID_QDM2, MKTAG('Q','D','M','2') }, |
| { 0, 0 }, |
| }; |
| |
| #define AIFF 0 |
| #define AIFF_C_VERSION1 0xA2805140 |
| |
| static enum CodecID aiff_codec_get_id(int bps) |
| { |
| if (bps <= 8) |
| return CODEC_ID_PCM_S8; |
| if (bps <= 16) |
| return CODEC_ID_PCM_S16BE; |
| if (bps <= 24) |
| return CODEC_ID_PCM_S24BE; |
| if (bps <= 32) |
| return CODEC_ID_PCM_S32BE; |
| |
| /* bigger than 32 isn't allowed */ |
| return CODEC_ID_NONE; |
| } |
| |
| /* returns the size of the found tag */ |
| static int get_tag(ByteIOContext *pb, uint32_t * tag) |
| { |
| int size; |
| |
| if (url_feof(pb)) |
| return AVERROR(EIO); |
| |
| *tag = get_le32(pb); |
| size = get_be32(pb); |
| |
| if (size < 0) |
| size = 0x7fffffff; |
| |
| return size; |
| } |
| |
| /* Metadata string read */ |
| static void get_meta(AVFormatContext *s, const char *key, int size) |
| { |
| uint8_t str[1024]; |
| int res = get_buffer(s->pb, str, FFMIN(sizeof(str)-1, size)); |
| if (res < 0) |
| return; |
| |
| str[res] = 0; |
| if (size & 1) |
| size++; |
| size -= res; |
| if (size) |
| url_fskip(s->pb, size); |
| |
| av_metadata_set(&s->metadata, key, str); |
| } |
| |
| /* Returns the number of sound data frames or negative on error */ |
| static unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec, |
| int size, unsigned version) |
| { |
| AVExtFloat ext; |
| double sample_rate; |
| unsigned int num_frames; |
| |
| if (size & 1) |
| size++; |
| codec->codec_type = CODEC_TYPE_AUDIO; |
| codec->channels = get_be16(pb); |
| num_frames = get_be32(pb); |
| codec->bits_per_coded_sample = get_be16(pb); |
| |
| get_buffer(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */ |
| sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */ |
| codec->sample_rate = sample_rate; |
| size -= 18; |
| |
| /* Got an AIFF-C? */ |
| if (version == AIFF_C_VERSION1) { |
| codec->codec_tag = get_le32(pb); |
| codec->codec_id = codec_get_id(codec_aiff_tags, codec->codec_tag); |
| |
| switch (codec->codec_id) { |
| case CODEC_ID_PCM_S16BE: |
| codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample); |
| codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id); |
| break; |
| case CODEC_ID_ADPCM_IMA_QT: |
| codec->block_align = 34*codec->channels; |
| codec->frame_size = 64; |
| break; |
| case CODEC_ID_MACE3: |
| codec->block_align = 2*codec->channels; |
| codec->frame_size = 6; |
| break; |
| case CODEC_ID_MACE6: |
| codec->block_align = 1*codec->channels; |
| codec->frame_size = 6; |
| break; |
| case CODEC_ID_GSM: |
| codec->block_align = 33; |
| codec->frame_size = 160; |
| break; |
| default: |
| break; |
| } |
| size -= 4; |
| } else { |
| /* Need the codec type */ |
| codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample); |
| codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id); |
| } |
| |
| /* Block align needs to be computed in all cases, as the definition |
| * is specific to applications -> here we use the WAVE format definition */ |
| if (!codec->block_align) |
| codec->block_align = (codec->bits_per_coded_sample * codec->channels) >> 3; |
| |
| codec->bit_rate = (codec->frame_size ? codec->sample_rate/codec->frame_size : |
| codec->sample_rate) * (codec->block_align << 3); |
| |
| /* Chunk is over */ |
| if (size) |
| url_fseek(pb, size, SEEK_CUR); |
| |
| return num_frames; |
| } |
| |
| #if CONFIG_AIFF_MUXER |
| typedef struct { |
| int64_t form; |
| int64_t frames; |
| int64_t ssnd; |
| } AIFFOutputContext; |
| |
| static int aiff_write_header(AVFormatContext *s) |
| { |
| AIFFOutputContext *aiff = s->priv_data; |
| ByteIOContext *pb = s->pb; |
| AVCodecContext *enc = s->streams[0]->codec; |
| AVExtFloat sample_rate; |
| int aifc = 0; |
| |
| /* First verify if format is ok */ |
| if (!enc->codec_tag) |
| return -1; |
| if (enc->codec_tag != MKTAG('N','O','N','E')) |
| aifc = 1; |
| |
| /* FORM AIFF header */ |
| put_tag(pb, "FORM"); |
| aiff->form = url_ftell(pb); |
| put_be32(pb, 0); /* file length */ |
| put_tag(pb, aifc ? "AIFC" : "AIFF"); |
| |
| if (aifc) { // compressed audio |
| enc->bits_per_coded_sample = 16; |
| if (!enc->block_align) { |
| av_log(s, AV_LOG_ERROR, "block align not set\n"); |
| return -1; |
| } |
| /* Version chunk */ |
| put_tag(pb, "FVER"); |
| put_be32(pb, 4); |
| put_be32(pb, 0xA2805140); |
| } |
| |
| /* Common chunk */ |
| put_tag(pb, "COMM"); |
| put_be32(pb, aifc ? 24 : 18); /* size */ |
| put_be16(pb, enc->channels); /* Number of channels */ |
| |
| aiff->frames = url_ftell(pb); |
| put_be32(pb, 0); /* Number of frames */ |
| |
| if (!enc->bits_per_coded_sample) |
| enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id); |
| if (!enc->bits_per_coded_sample) { |
| av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n"); |
| return -1; |
| } |
| if (!enc->block_align) |
| enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3; |
| |
| put_be16(pb, enc->bits_per_coded_sample); /* Sample size */ |
| |
| sample_rate = av_dbl2ext((double)enc->sample_rate); |
| put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate)); |
| |
| if (aifc) { |
| put_le32(pb, enc->codec_tag); |
| put_be16(pb, 0); |
| } |
| |
| /* Sound data chunk */ |
| put_tag(pb, "SSND"); |
| aiff->ssnd = url_ftell(pb); /* Sound chunk size */ |
| put_be32(pb, 0); /* Sound samples data size */ |
| put_be32(pb, 0); /* Data offset */ |
| put_be32(pb, 0); /* Block-size (block align) */ |
| |
| av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate); |
| |
| /* Data is starting here */ |
| put_flush_packet(pb); |
| |
| return 0; |
| } |
| |
| static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| ByteIOContext *pb = s->pb; |
| put_buffer(pb, pkt->data, pkt->size); |
| return 0; |
| } |
| |
| static int aiff_write_trailer(AVFormatContext *s) |
| { |
| ByteIOContext *pb = s->pb; |
| AIFFOutputContext *aiff = s->priv_data; |
| AVCodecContext *enc = s->streams[0]->codec; |
| |
| /* Chunks sizes must be even */ |
| int64_t file_size, end_size; |
| end_size = file_size = url_ftell(pb); |
| if (file_size & 1) { |
| put_byte(pb, 0); |
| end_size++; |
| } |
| |
| if (!url_is_streamed(s->pb)) { |
| /* File length */ |
| url_fseek(pb, aiff->form, SEEK_SET); |
| put_be32(pb, file_size - aiff->form - 4); |
| |
| /* Number of sample frames */ |
| url_fseek(pb, aiff->frames, SEEK_SET); |
| put_be32(pb, (file_size-aiff->ssnd-12)/enc->block_align); |
| |
| /* Sound Data chunk size */ |
| url_fseek(pb, aiff->ssnd, SEEK_SET); |
| put_be32(pb, file_size - aiff->ssnd - 4); |
| |
| /* return to the end */ |
| url_fseek(pb, end_size, SEEK_SET); |
| |
| put_flush_packet(pb); |
| } |
| |
| return 0; |
| } |
| #endif /* CONFIG_AIFF_MUXER */ |
| |
| static int aiff_probe(AVProbeData *p) |
| { |
| /* check file header */ |
| if (p->buf[0] == 'F' && p->buf[1] == 'O' && |
| p->buf[2] == 'R' && p->buf[3] == 'M' && |
| p->buf[8] == 'A' && p->buf[9] == 'I' && |
| p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C')) |
| return AVPROBE_SCORE_MAX; |
| else |
| return 0; |
| } |
| |
| /* aiff input */ |
| static int aiff_read_header(AVFormatContext *s, |
| AVFormatParameters *ap) |
| { |
| int size, filesize; |
| int64_t offset = 0; |
| uint32_t tag; |
| unsigned version = AIFF_C_VERSION1; |
| ByteIOContext *pb = s->pb; |
| AVStream * st = s->streams[0]; |
| |
| /* check FORM header */ |
| filesize = get_tag(pb, &tag); |
| if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M')) |
| return AVERROR_INVALIDDATA; |
| |
| /* AIFF data type */ |
| tag = get_le32(pb); |
| if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */ |
| version = AIFF; |
| else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */ |
| return AVERROR_INVALIDDATA; |
| |
| filesize -= 4; |
| |
| st = av_new_stream(s, 0); |
| if (!st) |
| return AVERROR(ENOMEM); |
| |
| while (filesize > 0) { |
| /* parse different chunks */ |
| size = get_tag(pb, &tag); |
| if (size < 0) |
| return size; |
| |
| filesize -= size + 8; |
| |
| switch (tag) { |
| case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */ |
| /* Then for the complete header info */ |
| st->nb_frames = get_aiff_header(pb, st->codec, size, version); |
| if (st->nb_frames < 0) |
| return st->nb_frames; |
| if (offset > 0) // COMM is after SSND |
| goto got_sound; |
| break; |
| case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */ |
| version = get_be32(pb); |
| break; |
| case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */ |
| get_meta(s, "title" , size); |
| break; |
| case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */ |
| get_meta(s, "author" , size); |
| break; |
| case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */ |
| get_meta(s, "copyright", size); |
| break; |
| case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */ |
| get_meta(s, "comment" , size); |
| break; |
| case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */ |
| offset = get_be32(pb); /* Offset of sound data */ |
| get_be32(pb); /* BlockSize... don't care */ |
| offset += url_ftell(pb); /* Compute absolute data offset */ |
| if (st->codec->block_align) /* Assume COMM already parsed */ |
| goto got_sound; |
| if (url_is_streamed(pb)) { |
| av_log(s, AV_LOG_ERROR, "file is not seekable\n"); |
| return -1; |
| } |
| url_fskip(pb, size - 8); |
| break; |
| case MKTAG('w', 'a', 'v', 'e'): |
| if ((uint64_t)size > (1<<30)) |
| return -1; |
| st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if (!st->codec->extradata) |
| return AVERROR(ENOMEM); |
| st->codec->extradata_size = size; |
| get_buffer(pb, st->codec->extradata, size); |
| break; |
| default: /* Jump */ |
| if (size & 1) /* Always even aligned */ |
| size++; |
| url_fskip (pb, size); |
| } |
| } |
| |
| if (!st->codec->block_align) { |
| av_log(s, AV_LOG_ERROR, "could not find COMM tag\n"); |
| return -1; |
| } |
| |
| got_sound: |
| /* Now positioned, get the sound data start and end */ |
| if (st->nb_frames) |
| s->file_size = st->nb_frames * st->codec->block_align; |
| |
| av_set_pts_info(st, 64, 1, st->codec->sample_rate); |
| st->start_time = 0; |
| st->duration = st->codec->frame_size ? |
| st->nb_frames * st->codec->frame_size : st->nb_frames; |
| |
| /* Position the stream at the first block */ |
| url_fseek(pb, offset, SEEK_SET); |
| |
| return 0; |
| } |
| |
| #define MAX_SIZE 4096 |
| |
| static int aiff_read_packet(AVFormatContext *s, |
| AVPacket *pkt) |
| { |
| AVStream *st = s->streams[0]; |
| int res; |
| |
| /* End of stream may be reached */ |
| if (url_feof(s->pb)) |
| return AVERROR(EIO); |
| |
| /* Now for that packet */ |
| res = av_get_packet(s->pb, pkt, (MAX_SIZE / st->codec->block_align) * st->codec->block_align); |
| if (res < 0) |
| return res; |
| |
| /* Only one stream in an AIFF file */ |
| pkt->stream_index = 0; |
| return 0; |
| } |
| |
| #if CONFIG_AIFF_DEMUXER |
| AVInputFormat aiff_demuxer = { |
| "aiff", |
| NULL_IF_CONFIG_SMALL("Audio IFF"), |
| 0, |
| aiff_probe, |
| aiff_read_header, |
| aiff_read_packet, |
| NULL, |
| pcm_read_seek, |
| .codec_tag= (const AVCodecTag* const []){codec_aiff_tags, 0}, |
| }; |
| #endif |
| |
| #if CONFIG_AIFF_MUXER |
| AVOutputFormat aiff_muxer = { |
| "aiff", |
| NULL_IF_CONFIG_SMALL("Audio IFF"), |
| "audio/aiff", |
| "aif,aiff,afc,aifc", |
| sizeof(AIFFOutputContext), |
| CODEC_ID_PCM_S16BE, |
| CODEC_ID_NONE, |
| aiff_write_header, |
| aiff_write_packet, |
| aiff_write_trailer, |
| .codec_tag= (const AVCodecTag* const []){codec_aiff_tags, 0}, |
| }; |
| #endif |
