diff options
Diffstat (limited to 'ffmpeg1/libavformat/aiffdec.c')
| -rw-r--r-- | ffmpeg1/libavformat/aiffdec.c | 358 |
1 files changed, 0 insertions, 358 deletions
diff --git a/ffmpeg1/libavformat/aiffdec.c b/ffmpeg1/libavformat/aiffdec.c deleted file mode 100644 index 8d466fa..0000000 --- a/ffmpeg1/libavformat/aiffdec.c +++ /dev/null @@ -1,358 +0,0 @@ -/* - * 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/mathematics.h" -#include "libavutil/dict.h" -#include "avformat.h" -#include "internal.h" -#include "pcm.h" -#include "aiff.h" -#include "isom.h" -#include "id3v2.h" -#include "mov_chan.h" - -#define AIFF 0 -#define AIFF_C_VERSION1 0xA2805140 - -typedef struct { - 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 int get_tag(AVIOContext *pb, uint32_t * tag) -{ - int size; - - if (url_feof(pb)) - return AVERROR(EIO); - - *tag = avio_rl32(pb); - size = avio_rb32(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 = av_malloc(size+1); - - if (str) { - int res = avio_read(s->pb, str, size); - if (res < 0){ - av_free(str); - return; - } - size += (size&1)-res; - str[res] = 0; - av_dict_set(&s->metadata, key, str, AV_DICT_DONT_STRDUP_VAL); - }else - size+= size&1; - - avio_skip(s->pb, size); -} - -/* Returns the number of sound data frames or negative on error */ -static unsigned int get_aiff_header(AVFormatContext *s, int size, - unsigned version) -{ - AVIOContext *pb = s->pb; - AVCodecContext *codec = s->streams[0]->codec; - AIFFInputContext *aiff = s->priv_data; - int exp; - uint64_t val; - double sample_rate; - unsigned int num_frames; - - if (size & 1) - size++; - codec->codec_type = AVMEDIA_TYPE_AUDIO; - codec->channels = avio_rb16(pb); - num_frames = avio_rb32(pb); - codec->bits_per_coded_sample = avio_rb16(pb); - - exp = avio_rb16(pb); - val = avio_rb64(pb); - sample_rate = ldexp(val, exp - 16383 - 63); - codec->sample_rate = sample_rate; - size -= 18; - - /* get codec id for AIFF-C */ - if (version == AIFF_C_VERSION1) { - codec->codec_tag = avio_rl32(pb); - codec->codec_id = ff_codec_get_id(ff_codec_aiff_tags, codec->codec_tag); - size -= 4; - } - - if (version != AIFF_C_VERSION1 || codec->codec_id == AV_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); - aiff->block_duration = 1; - } else { - switch (codec->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: - codec->block_align = 34*codec->channels; - break; - case AV_CODEC_ID_MACE3: - codec->block_align = 2*codec->channels; - break; - case AV_CODEC_ID_MACE6: - codec->block_align = 1*codec->channels; - break; - case AV_CODEC_ID_GSM: - codec->block_align = 33; - break; - case AV_CODEC_ID_QCELP: - codec->block_align = 35; - break; - default: - aiff->block_duration = 1; - break; - } - if (codec->block_align > 0) - aiff->block_duration = av_get_audio_frame_duration(codec, - codec->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 (!codec->block_align) - codec->block_align = (av_get_bits_per_sample(codec->codec_id) * codec->channels) >> 3; - - if (aiff->block_duration) { - codec->bit_rate = codec->sample_rate * (codec->block_align << 3) / - aiff->block_duration; - } - - /* Chunk is over */ - if (size) - avio_skip(pb, size); - - return num_frames; -} - -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) -{ - int ret, size, filesize; - int64_t offset = 0; - uint32_t tag; - unsigned version = AIFF_C_VERSION1; - AVIOContext *pb = s->pb; - AVStream * st; - AIFFInputContext *aiff = s->priv_data; - ID3v2ExtraMeta *id3v2_extra_meta = NULL; - - /* check FORM header */ - filesize = get_tag(pb, &tag); - if (filesize < 0 || 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 < 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', ' '): - ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta); - if (id3v2_extra_meta) - if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) { - ff_id3v2_free_extra_meta(&id3v2_extra_meta); - return ret; - } - ff_id3v2_free_extra_meta(&id3v2_extra_meta); - 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 */ - 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->codec->block_align && !pb->seekable) /* Assume COMM already parsed */ - goto got_sound; - if (!pb->seekable) { - 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 -1; - st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!st->codec->extradata) - return AVERROR(ENOMEM); - st->codec->extradata_size = size; - avio_read(pb, st->codec->extradata, size); - if (st->codec->codec_id == AV_CODEC_ID_QDM2 && size>=12*4 && !st->codec->block_align) { - st->codec->block_align = AV_RB32(st->codec->extradata+11*4); - aiff->block_duration = AV_RB32(st->codec->extradata+9*4); - } - break; - case MKTAG('C','H','A','N'): - if(ff_mov_read_chan(s, pb, st, size) < 0) - return AVERROR_INVALIDDATA; - break; - default: /* Jump */ - if (size & 1) /* Always even aligned */ - size++; - avio_skip(pb, size); - } - } - -got_sound: - if (!st->codec->block_align) { - av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n"); - return -1; - } - - /* Now positioned, get the sound data start and end */ - avpriv_set_pts_info(st, 64, 1, st->codec->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; - - /* Now for that packet */ - if (st->codec->block_align >= 33) // GSM, QCLP, IMA4 - size = st->codec->block_align; - else - size = (MAX_SIZE / st->codec->block_align) * st->codec->block_align; - size = FFMIN(max_size, size); - res = av_get_packet(s->pb, pkt, size); - if (res < 0) - return res; - - if (size >= st->codec->block_align) - pkt->flags &= ~AV_PKT_FLAG_CORRUPT; - /* Only one stream in an AIFF file */ - pkt->stream_index = 0; - pkt->duration = (res / st->codec->block_align) * aiff->block_duration; - return 0; -} - -AVInputFormat ff_aiff_demuxer = { - .name = "aiff", - .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"), - .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, - .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 }, -}; |