| /* | |
| * AIFF/AIFF-C 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/intreadwrite.h" | |
| #include "libavutil/dict.h" | |
| #include "avformat.h" | |
| #include "demux.h" | |
| #include "internal.h" | |
| #include "pcm.h" | |
| #include "aiff.h" | |
| #include "id3v2.h" | |
| #include "mov_chan.h" | |
| #include "replaygain.h" | |
| #define AIFF 0 | |
| #define AIFF_C_VERSION1 0xA2805140 | |
| typedef struct AIFFInputContext { | |
| int64_t data_end; | |
| int block_duration; | |
| } AIFFInputContext; | |
| static enum AVCodecID aiff_codec_get_id(int bps) | |
| { | |
| if (bps <= 8) | |
| return AV_CODEC_ID_PCM_S8; | |
| if (bps <= 16) | |
| return AV_CODEC_ID_PCM_S16BE; | |
| if (bps <= 24) | |
| return AV_CODEC_ID_PCM_S24BE; | |
| if (bps <= 32) | |
| return AV_CODEC_ID_PCM_S32BE; | |
| /* bigger than 32 isn't allowed */ | |
| return AV_CODEC_ID_NONE; | |
| } | |
| /* returns the size of the found tag */ | |
| static int64_t get_tag(AVIOContext *pb, uint32_t * tag) | |
| { | |
| int64_t size; | |
| if (avio_feof(pb)) | |
| return AVERROR(EIO); | |
| *tag = avio_rl32(pb); | |
| size = avio_rb32(pb); | |
| return size; | |
| } | |
| /* Metadata string read */ | |
| static void get_meta(AVFormatContext *s, const char *key, int64_t size) | |
| { | |
| uint8_t *str = NULL; | |
| if (size < SIZE_MAX) | |
| str = av_malloc(size+1); | |
| if (str) { | |
| int res = avio_read(s->pb, str, size); | |
| if (res < 0){ | |
| av_free(str); | |
| return; | |
| } | |
| size -= res; | |
| str[res] = 0; | |
| av_dict_set(&s->metadata, key, str, AV_DICT_DONT_STRDUP_VAL); | |
| } | |
| avio_skip(s->pb, size); | |
| } | |
| /* Returns the number of sound data frames or negative on error */ | |
| static int get_aiff_header(AVFormatContext *s, int64_t size, | |
| unsigned version) | |
| { | |
| AVIOContext *pb = s->pb; | |
| AVCodecParameters *par = s->streams[0]->codecpar; | |
| AIFFInputContext *aiff = s->priv_data; | |
| int exp; | |
| uint64_t val; | |
| int sample_rate; | |
| unsigned int num_frames; | |
| int channels; | |
| if (size & 1) | |
| size++; | |
| par->codec_type = AVMEDIA_TYPE_AUDIO; | |
| channels = avio_rb16(pb); | |
| if (par->ch_layout.nb_channels && par->ch_layout.nb_channels != channels) | |
| return AVERROR_INVALIDDATA; | |
| par->ch_layout.nb_channels = channels; | |
| num_frames = avio_rb32(pb); | |
| par->bits_per_coded_sample = avio_rb16(pb); | |
| exp = avio_rb16(pb) - 16383 - 63; | |
| val = avio_rb64(pb); | |
| if (exp <-63 || exp >63) { | |
| av_log(s, AV_LOG_ERROR, "exp %d is out of range\n", exp); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (exp >= 0) | |
| sample_rate = val << exp; | |
| else | |
| sample_rate = (val + (1ULL<<(-exp-1))) >> -exp; | |
| if (sample_rate <= 0) | |
| return AVERROR_INVALIDDATA; | |
| par->sample_rate = sample_rate; | |
| if (size < 18) | |
| return AVERROR_INVALIDDATA; | |
| size -= 18; | |
| /* get codec id for AIFF-C */ | |
| if (size < 4) { | |
| version = AIFF; | |
| } else if (version == AIFF_C_VERSION1) { | |
| par->codec_tag = avio_rl32(pb); | |
| par->codec_id = ff_codec_get_id(ff_codec_aiff_tags, par->codec_tag); | |
| if (par->codec_id == AV_CODEC_ID_NONE) | |
| avpriv_request_sample(s, "unknown or unsupported codec tag: %s", | |
| av_fourcc2str(par->codec_tag)); | |
| size -= 4; | |
| } | |
| if (version != AIFF_C_VERSION1 || par->codec_id == AV_CODEC_ID_PCM_S16BE) { | |
| par->codec_id = aiff_codec_get_id(par->bits_per_coded_sample); | |
| par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id); | |
| aiff->block_duration = 1; | |
| } else { | |
| switch (par->codec_id) { | |
| case AV_CODEC_ID_PCM_F32BE: | |
| case AV_CODEC_ID_PCM_F64BE: | |
| case AV_CODEC_ID_PCM_S16LE: | |
| case AV_CODEC_ID_PCM_ALAW: | |
| case AV_CODEC_ID_PCM_MULAW: | |
| aiff->block_duration = 1; | |
| break; | |
| case AV_CODEC_ID_ADPCM_IMA_QT: | |
| par->block_align = 34 * channels; | |
| break; | |
| case AV_CODEC_ID_MACE3: | |
| par->block_align = 2 * channels; | |
| break; | |
| case AV_CODEC_ID_ADPCM_G726LE: | |
| par->bits_per_coded_sample = 5; | |
| case AV_CODEC_ID_ADPCM_IMA_WS: | |
| case AV_CODEC_ID_ADPCM_G722: | |
| case AV_CODEC_ID_MACE6: | |
| case AV_CODEC_ID_CBD2_DPCM: | |
| case AV_CODEC_ID_SDX2_DPCM: | |
| par->block_align = 1 * channels; | |
| break; | |
| case AV_CODEC_ID_GSM: | |
| par->block_align = 33; | |
| break; | |
| default: | |
| aiff->block_duration = 1; | |
| break; | |
| } | |
| if (par->block_align > 0) | |
| aiff->block_duration = av_get_audio_frame_duration2(par, | |
| par->block_align); | |
| } | |
| /* Block align needs to be computed in all cases, as the definition | |
| * is specific to applications -> here we use the WAVE format definition */ | |
| if (!par->block_align) | |
| par->block_align = (av_get_bits_per_sample(par->codec_id) * channels) >> 3; | |
| if (aiff->block_duration) { | |
| par->bit_rate = av_rescale(par->sample_rate, par->block_align * 8LL, | |
| aiff->block_duration); | |
| if (par->bit_rate < 0) | |
| par->bit_rate = 0; | |
| } | |
| /* Chunk is over */ | |
| if (size) | |
| avio_skip(pb, size); | |
| return num_frames; | |
| } | |
| static int aiff_probe(const AVProbeData *p) | |
| { | |
| /* check file header */ | |
| if (AV_RL32(p->buf) == MKTAG('F', 'O', 'R', 'M') && | |
| AV_RB32(p->buf + 4) >= 4 && | |
| 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) | |
| { | |
| int ret; | |
| int64_t filesize, size; | |
| int64_t offset = 0, position; | |
| uint32_t tag; | |
| unsigned version = AIFF_C_VERSION1; | |
| AVIOContext *pb = s->pb; | |
| AVStream * st; | |
| AIFFInputContext *aiff = s->priv_data; | |
| ID3v2ExtraMeta *id3v2_extra_meta; | |
| /* check FORM header */ | |
| filesize = get_tag(pb, &tag); | |
| if (filesize < 4 || tag != MKTAG('F', 'O', 'R', 'M')) | |
| return AVERROR_INVALIDDATA; | |
| /* AIFF data type */ | |
| tag = avio_rl32(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 = avformat_new_stream(s, NULL); | |
| if (!st) | |
| return AVERROR(ENOMEM); | |
| while (filesize > 0) { | |
| /* parse different chunks */ | |
| size = get_tag(pb, &tag); | |
| if (size == AVERROR_EOF && offset > 0 && st->codecpar->block_align) { | |
| av_log(s, AV_LOG_WARNING, "header parser hit EOF\n"); | |
| goto got_sound; | |
| } | |
| 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(s, size, version); | |
| if (st->nb_frames < 0) | |
| return st->nb_frames; | |
| if (offset > 0) // COMM is after SSND | |
| goto got_sound; | |
| break; | |
| case MKTAG('I', 'D', '3', ' '): | |
| position = avio_tell(pb); | |
| ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size); | |
| if (id3v2_extra_meta) | |
| if ((ret = ff_id3v2_parse_apic(s, id3v2_extra_meta)) < 0 || | |
| (ret = ff_id3v2_parse_chapters(s, id3v2_extra_meta)) < 0) { | |
| ff_id3v2_free_extra_meta(&id3v2_extra_meta); | |
| return ret; | |
| } | |
| ff_id3v2_free_extra_meta(&id3v2_extra_meta); | |
| if (position + size > avio_tell(pb)) | |
| avio_skip(pb, position + size - avio_tell(pb)); | |
| break; | |
| case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */ | |
| version = avio_rb32(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 */ | |
| if (size < 8) | |
| return AVERROR_INVALIDDATA; | |
| aiff->data_end = avio_tell(pb) + size; | |
| offset = avio_rb32(pb); /* Offset of sound data */ | |
| avio_rb32(pb); /* BlockSize... don't care */ | |
| offset += avio_tell(pb); /* Compute absolute data offset */ | |
| if (st->codecpar->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) /* Assume COMM already parsed */ | |
| goto got_sound; | |
| if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) { | |
| av_log(s, AV_LOG_ERROR, "file is not seekable\n"); | |
| return -1; | |
| } | |
| avio_skip(pb, size - 8); | |
| break; | |
| case MKTAG('w', 'a', 'v', 'e'): | |
| if ((uint64_t)size > (1<<30)) | |
| return AVERROR_INVALIDDATA; | |
| if ((ret = ff_get_extradata(s, st->codecpar, pb, size)) < 0) | |
| return ret; | |
| if ( (st->codecpar->codec_id == AV_CODEC_ID_QDMC || st->codecpar->codec_id == AV_CODEC_ID_QDM2) | |
| && size>=12*4 && !st->codecpar->block_align) { | |
| st->codecpar->block_align = AV_RB32(st->codecpar->extradata+11*4); | |
| aiff->block_duration = AV_RB32(st->codecpar->extradata+9*4); | |
| } else if (st->codecpar->codec_id == AV_CODEC_ID_QCELP) { | |
| char rate = 0; | |
| if (size >= 25) | |
| rate = st->codecpar->extradata[24]; | |
| switch (rate) { | |
| case 'H': // RATE_HALF | |
| st->codecpar->block_align = 17; | |
| break; | |
| case 'F': // RATE_FULL | |
| default: | |
| st->codecpar->block_align = 35; | |
| } | |
| aiff->block_duration = 160; | |
| st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate * (st->codecpar->block_align << 3) / | |
| aiff->block_duration; | |
| } | |
| break; | |
| case MKTAG('C','H','A','N'): | |
| if ((ret = ff_mov_read_chan(s, pb, st, size)) < 0) | |
| return ret; | |
| break; | |
| case MKTAG('A','P','C','M'): /* XA ADPCM compressed sound chunk */ | |
| st->codecpar->codec_id = AV_CODEC_ID_ADPCM_XA; | |
| aiff->data_end = avio_tell(pb) + size; | |
| offset = avio_tell(pb) + 8; | |
| /* This field is unknown and its data seems to be irrelevant */ | |
| avio_rb32(pb); | |
| st->codecpar->block_align = avio_rb32(pb); | |
| goto got_sound; | |
| break; | |
| case 0: | |
| if (offset > 0 && st->codecpar->block_align) // COMM && SSND | |
| goto got_sound; | |
| default: /* Jump */ | |
| avio_skip(pb, size); | |
| } | |
| /* Skip required padding byte for odd-sized chunks. */ | |
| if (size & 1) { | |
| filesize--; | |
| avio_skip(pb, 1); | |
| } | |
| } | |
| ret = ff_replaygain_export(st, s->metadata); | |
| if (ret < 0) | |
| return ret; | |
| got_sound: | |
| if (!st->codecpar->block_align && st->codecpar->codec_id == AV_CODEC_ID_QCELP) { | |
| av_log(s, AV_LOG_WARNING, "qcelp without wave chunk, assuming full rate\n"); | |
| st->codecpar->block_align = 35; | |
| } else if (st->codecpar->block_align <= 0) { | |
| av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (aiff->block_duration < 0) | |
| return AVERROR_INVALIDDATA; | |
| /* Now positioned, get the sound data start and end */ | |
| avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| st->start_time = 0; | |
| st->duration = st->nb_frames * aiff->block_duration; | |
| /* Position the stream at the first block */ | |
| avio_seek(pb, offset, SEEK_SET); | |
| return 0; | |
| } | |
| #define MAX_SIZE 4096 | |
| static int aiff_read_packet(AVFormatContext *s, | |
| AVPacket *pkt) | |
| { | |
| AVStream *st = s->streams[0]; | |
| AIFFInputContext *aiff = s->priv_data; | |
| int64_t max_size; | |
| int res, size; | |
| /* calculate size of remaining data */ | |
| max_size = aiff->data_end - avio_tell(s->pb); | |
| if (max_size <= 0) | |
| return AVERROR_EOF; | |
| if (!st->codecpar->block_align) { | |
| av_log(s, AV_LOG_ERROR, "block_align not set\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| /* Now for that packet */ | |
| switch (st->codecpar->codec_id) { | |
| case AV_CODEC_ID_ADPCM_IMA_QT: | |
| case AV_CODEC_ID_GSM: | |
| case AV_CODEC_ID_QDM2: | |
| case AV_CODEC_ID_QCELP: | |
| size = st->codecpar->block_align; | |
| break; | |
| default: | |
| size = st->codecpar->block_align ? (MAX_SIZE / st->codecpar->block_align) * st->codecpar->block_align : MAX_SIZE; | |
| if (!size) | |
| return AVERROR_INVALIDDATA; | |
| } | |
| size = FFMIN(max_size, size); | |
| res = av_get_packet(s->pb, pkt, size); | |
| if (res < 0) | |
| return res; | |
| if (size >= st->codecpar->block_align) | |
| pkt->flags &= ~AV_PKT_FLAG_CORRUPT; | |
| /* Only one stream in an AIFF file */ | |
| pkt->stream_index = 0; | |
| pkt->duration = (res / st->codecpar->block_align) * (int64_t) aiff->block_duration; | |
| return 0; | |
| } | |
| const FFInputFormat ff_aiff_demuxer = { | |
| .p.name = "aiff", | |
| .p.long_name = NULL_IF_CONFIG_SMALL("Audio IFF"), | |
| .p.codec_tag = ff_aiff_codec_tags_list, | |
| .priv_data_size = sizeof(AIFFInputContext), | |
| .read_probe = aiff_probe, | |
| .read_header = aiff_read_header, | |
| .read_packet = aiff_read_packet, | |
| .read_seek = ff_pcm_read_seek, | |
| }; |