static int mp3_read_header(AVFormatContext *s, AVFormatParameters *ap) { AVStream *st; int64_t off; st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = CODEC_ID_MP3; st->need_parsing = AVSTREAM_PARSE_FULL; st->start_time = 0; // lcm of all mp3 sample rates av_set_pts_info(st, 64, 1, 14112000); ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC); off = url_ftell(s->pb); if (!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX)) ff_id3v1_read(s); if (mp3_parse_vbr_tags(s, st, off) < 0) url_fseek(s->pb, off, SEEK_SET); /* the parameters will be extracted from the compressed bitstream */ return 0; }
static void read_id3(AVFormatContext *s, uint64_t id3pos) { ID3v2ExtraMeta *id3v2_extra_meta = NULL; if (avio_seek(s->pb, id3pos, SEEK_SET) < 0) return; ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, 0); if (id3v2_extra_meta) ff_id3v2_parse_apic(s, &id3v2_extra_meta); ff_id3v2_free_extra_meta(&id3v2_extra_meta); }
/* aiff input */ static int aiff_read_header(AVFormatContext *s) { int ret, size, filesize; 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 = 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', ' '): position = avio_tell(pb); 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); 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 */ 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); } else if (st->codec->codec_id == AV_CODEC_ID_QCELP) { char rate = 0; if (size >= 25) rate = st->codec->extradata[24]; switch (rate) { case 'H': // RATE_HALF st->codec->block_align = 17; break; case 'F': // RATE_FULL default: st->codec->block_align = 35; } aiff->block_duration = 160; st->codec->bit_rate = st->codec->sample_rate * (st->codec->block_align << 3) / aiff->block_duration; } 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; }
static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof) { AVIOContext *pb = s->pb; char abss[24]; int hour, min, sec, i, ret, config; int dsd_layout[6]; ID3v2ExtraMeta *id3v2_extra_meta; while (avio_tell(pb) + 12 <= eof) { uint32_t tag = avio_rl32(pb); uint64_t size = avio_rb64(pb); uint64_t orig_pos = avio_tell(pb); switch(tag) { case MKTAG('A','B','S','S'): if (size < 8) return AVERROR_INVALIDDATA; hour = avio_rb16(pb); min = avio_r8(pb); sec = avio_r8(pb); snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb)); av_dict_set(&st->metadata, "absolute_start_time", abss, 0); break; case MKTAG('C','H','N','L'): if (size < 2) return AVERROR_INVALIDDATA; st->codec->channels = avio_rb16(pb); if (size < 2 + st->codec->channels * 4) return AVERROR_INVALIDDATA; st->codec->channel_layout = 0; if (st->codec->channels > FF_ARRAY_ELEMS(dsd_layout)) { avpriv_request_sample(s, "channel layout"); break; } for (i = 0; i < st->codec->channels; i++) dsd_layout[i] = avio_rl32(pb); for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) { const DSDLayoutDesc * d = &dsd_channel_layout[i]; if (av_get_channel_layout_nb_channels(d->layout) == st->codec->channels && !memcmp(d->dsd_layout, dsd_layout, st->codec->channels * sizeof(uint32_t))) { st->codec->channel_layout = d->layout; break; } } break; case MKTAG('C','M','P','R'): if (size < 4) return AVERROR_INVALIDDATA; tag = avio_rl32(pb); st->codec->codec_id = ff_codec_get_id(dsd_codec_tags, tag); if (!st->codec->codec_id) { av_log(s, AV_LOG_ERROR, "'%c%c%c%c' compression is not supported\n", tag&0xFF, (tag>>8)&0xFF, (tag>>16)&0xFF, (tag>>24)&0xFF); return AVERROR_PATCHWELCOME; } break; case MKTAG('F','S',' ',' '): if (size < 4) return AVERROR_INVALIDDATA; st->codec->sample_rate = avio_rb32(pb) / 8; break; case MKTAG('I','D','3',' '): id3v2_extra_meta = NULL; 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) { ff_id3v2_free_extra_meta(&id3v2_extra_meta); return ret; } ff_id3v2_free_extra_meta(&id3v2_extra_meta); } if (size < avio_tell(pb) - orig_pos) { av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n"); return AVERROR_INVALIDDATA; } break; case MKTAG('L','S','C','O'): if (size < 2) return AVERROR_INVALIDDATA; config = avio_rb16(pb); if (config != 0xFFFF) { if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config)) st->codec->channel_layout = dsd_loudspeaker_config[config]; if (!st->codec->channel_layout) avpriv_request_sample(s, "loudspeaker configuration %d", config); } break; } avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1)); }
int AudioConvertFunc(const char *outfilename,int sample_rate,int channels,int sec,const char *inputfilename,HWND mParentHwnd,UINT mMsg) { AVCodec *aCodec =NULL; AVPacket *packet = NULL; AVFormatContext *pFormatCtx =NULL; AVCodecContext *aCodecCtx= NULL; ReSampleContext* ResampleCtx=NULL; AVFrame *decoded_frame = NULL; int datasize; //int tempcount = 0; //long total_out_size=0; int64_t total_in_convert_size = 0; int audioConvertProgress = 0; int tempAudioConvertProgress; unsigned int i; int len, ret, buffer_size, count, audio_stream_index = -1, totle_samplenum = 0; FILE *outfile = NULL;// *infile; head_pama pt; int16_t *audio_buffer = NULL; int16_t *resamplebuff = NULL; int ResampleChange=0; int ChannelsChange=0; int tempret; packet = (AVPacket*)malloc(sizeof(AVPacket)); if (packet==NULL) { PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)(-1)); return -1; } packet->data=NULL; buffer_size = AVCODEC_MAX_AUDIO_FRAME_SIZE * 100; audio_buffer = (int16_t *)av_malloc(buffer_size); if (audio_buffer==NULL) { if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)(-2)); return -2; } av_register_all(); av_init_packet(packet); #if 0 /**********尝试分解av_open_input_file函数*************/ int ret = 0; AVFormatParameters ap = { 0 }; AVDictionary *tmp = NULL; AVInputFormat *fmt = NULL; AVDictionary **options = NULL; if (!pFormatCtx && !(pFormatCtx = avformat_alloc_context())) return AVERROR(ENOMEM); if (fmt) pFormatCtx->iformat = fmt; if (options) av_dict_copy(&tmp, *options, 0); if ((ret = av_opt_set_dict(pFormatCtx, &tmp)) < 0) goto fail; AVDictionary *tmp = NULL; if (!pFormatCtx && !(pFormatCtx = avformat_alloc_context())) return AVERROR(ENOMEM); int ret; AVProbeData pd = {inputfilename, NULL, 0}; if (pFormatCtx->pb) { pFormatCtx->flags |= AVFMT_FLAG_CUSTOM_IO; if (!pFormatCtx->iformat) return av_probe_input_buffer(pFormatCtx->pb, &pFormatCtx->iformat, inputfilename, pFormatCtx, 0, 0); else if (pFormatCtx->iformat->flags & AVFMT_NOFILE) av_log(pFormatCtx, AV_LOG_WARNING, "Custom AVIOContext makes no sense and " "will be ignored with AVFMT_NOFILE format.\n"); return 0; } if ( (pFormatCtx->iformat && pFormatCtx->iformat->flags & AVFMT_NOFILE) || (!pFormatCtx->iformat && (pFormatCtx->iformat = av_probe_input_format(&pd, 0)))) return 0; URLContext *h; int err; err = ffurl_open(&h, inputfilename, AVIO_RDONLY); if (err < 0) return err; err = ffio_fdopen(pFormatCtx, h); if (err < 0) { ffurl_close(h); return err; } if (pFormatCtx->iformat) return 0; av_probe_input_buffer(pFormatCtx->pb, &pFormatCtx->iformat, inputfilename, pFormatCtx, 0, 0); if (pFormatCtx->iformat->flags & AVFMT_NEEDNUMBER) { if (!av_filename_number_test(inputfilename)) { ret = AVERROR(EINVAL); goto fail; } } pFormatCtx->duration = pFormatCtx->start_time = AV_NOPTS_VALUE; av_strlcpy(pFormatCtx->filename, inputfilename ? inputfilename : "", sizeof(pFormatCtx->filename)); /* allocate private data */ if (pFormatCtx->iformat->priv_data_size > 0) { if (!(pFormatCtx->priv_data = av_mallocz(pFormatCtx->iformat->priv_data_size))) { ret = AVERROR(ENOMEM); goto fail; } if (pFormatCtx->iformat->priv_class) { *(const AVClass**)pFormatCtx->priv_data = pFormatCtx->iformat->priv_class; av_opt_set_defaults(pFormatCtx->priv_data); if ((ret = av_opt_set_dict(pFormatCtx->priv_data, &tmp)) < 0) goto fail; } } /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */ if (pFormatCtx->pb) ff_id3v2_read(pFormatCtx, ID3v2_DEFAULT_MAGIC); if (!(pFormatCtx->flags&AVFMT_FLAG_PRIV_OPT) && pFormatCtx->iformat->read_header) if ((ret = pFormatCtx->iformat->read_header(pFormatCtx, &ap)) < 0) goto fail; if (!(pFormatCtx->flags&AVFMT_FLAG_PRIV_OPT) && pFormatCtx->pb && !pFormatCtx->data_offset) pFormatCtx->data_offset = avio_tell(pFormatCtx->pb); pFormatCtx->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; if (options) { av_dict_free(options); *options = tmp; } return 0; fail: av_dict_free(&tmp); if (pFormatCtx->pb && !(pFormatCtx->flags & AVFMT_FLAG_CUSTOM_IO)) avio_close(pFormatCtx->pb); avformat_free_context(pFormatCtx); pFormatCtx = NULL; return ret; return err; /**********尝试分解av_open_input_file函数*************/ //pFormatCtx = avformat_alloc_context(); #endif ret = av_open_input_file(&pFormatCtx, inputfilename, NULL,0, NULL); if(ret < 0) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)1); return 1; } ret = av_find_stream_info(pFormatCtx); if( ret < 0) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)2); return 2; } audio_stream_index=-1; for(i=0; i< (signed)pFormatCtx->nb_streams; i++) { if(pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO && audio_stream_index < 0) { audio_stream_index = i; break; } } if(audio_stream_index == -1) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)3); return 3; } aCodecCtx = pFormatCtx->streams[audio_stream_index]->codec; if (aCodecCtx==NULL) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)4); return 4; } aCodec = avcodec_find_decoder(aCodecCtx->codec_id); if(!aCodec) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } /*if (aCodecCtx!=NULL) { avcodec_close(aCodecCtx); aCodecCtx=NULL; }*/ PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)5); return 5; } //resample init if (channels==0) { channels=aCodecCtx->channels; } if (sample_rate==0) { sample_rate=aCodecCtx->sample_rate; } //if (aCodecCtx->channels!=channels) //{ // ChannelsChange=1; // ResampleChange=1; //} if (aCodecCtx->sample_rate!=sample_rate||aCodecCtx->channels!=channels) { ResampleChange=1; } if (ResampleChange==1) { ResampleCtx = av_audio_resample_init(channels,aCodecCtx->channels,sample_rate,aCodecCtx->sample_rate,SAMPLE_FMT_S16,SAMPLE_FMT_S16,16,10,0,1.0); if (ResampleCtx==NULL) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } /*if (aCodecCtx!=NULL) { avcodec_close(aCodecCtx); aCodecCtx=NULL; }*/ ResampleChange=0; PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)6); return 6; } resamplebuff=(int16_t *)malloc(buffer_size); if (resamplebuff==NULL) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } /*if (aCodecCtx!=NULL) { avcodec_close(aCodecCtx); aCodecCtx=NULL; }*/ if (ResampleChange==1&&ResampleCtx!=NULL) { audio_resample_close(ResampleCtx); ResampleCtx=NULL; } PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)7); return 7; } } // datasize=sec*sample_rate; if(avcodec_open(aCodecCtx, aCodec)<0) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } if (aCodecCtx!=NULL) { avcodec_close(aCodecCtx); aCodecCtx=NULL; } if (ResampleChange==1&&ResampleCtx!=NULL&&resamplebuff!=NULL) { audio_resample_close(ResampleCtx); ResampleCtx=NULL; free(resamplebuff); resamplebuff=NULL; } ResampleChange=0; PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)8); return 8; } pt.bits = 16; pt.channels = channels; pt.rate = sample_rate; outfile = fopen(outfilename, "wb"); if (!outfile) { if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } if (packet!=NULL) { free(packet); packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } if (aCodecCtx!=NULL) { avcodec_close(aCodecCtx); aCodecCtx=NULL; } if (ResampleChange==1&&ResampleCtx!=NULL&&resamplebuff!=NULL) { audio_resample_close(ResampleCtx); ResampleCtx=NULL; free(resamplebuff); resamplebuff=NULL; } ResampleChange=0; PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)9); return 9; } fseek(outfile,44,SEEK_SET); while(av_read_frame(pFormatCtx, packet) >= 0) { CheckMessageQueue(); if(packet->stream_index == audio_stream_index) { //while(packet->size > 0) //{ buffer_size = AVCODEC_MAX_AUDIO_FRAME_SIZE * 100; len = avcodec_decode_audio3(aCodecCtx, audio_buffer, &buffer_size, packet); if (len < 0) { break; } if(buffer_size > 0) { //resample if (ResampleChange==1) { int samples=buffer_size/ ((aCodecCtx->channels) * 2); int resamplenum= 0; resamplenum = audio_resample(ResampleCtx, resamplebuff, audio_buffer, samples); count = fwrite(resamplebuff, 2*channels, resamplenum, outfile); } else { count = fwrite(audio_buffer, 2*aCodecCtx->channels, buffer_size/((aCodecCtx->channels)*2), outfile); } totle_samplenum += count; } //tempcount++; //total_out_size += count*2*aCodecCtx->channels; total_in_convert_size += packet->size; tempAudioConvertProgress = 100*total_in_convert_size/(pFormatCtx->file_size); if(tempAudioConvertProgress != audioConvertProgress) { if(tempAudioConvertProgress == 100) tempAudioConvertProgress = 99; audioConvertProgress = tempAudioConvertProgress; tempret = PostMessage(mParentHwnd,mMsg,DECING_TAG,audioConvertProgress); } if (packet->data!=NULL) { av_free_packet(packet); packet->data=NULL; } //packet->size -= len; //packet->data += len; //} if (datasize!=0&&totle_samplenum>=datasize) { break; } } } audioConvertProgress = 100; PostMessage(mParentHwnd,mMsg,DECING_TAG,audioConvertProgress); fseek(outfile,0,SEEK_SET); wav_write_header(outfile, pt, totle_samplenum); if (outfile!=NULL) { fclose(outfile); outfile=NULL; } if (audio_buffer!=NULL) { av_free(audio_buffer); audio_buffer=NULL; } if (aCodecCtx!=NULL) { avcodec_close(aCodecCtx); aCodecCtx=NULL; } if (packet!=NULL) { free(packet);// packet=NULL; } if (pFormatCtx!=NULL) { av_close_input_file(pFormatCtx); pFormatCtx=NULL; } if (ResampleChange==1) { if (resamplebuff!=NULL) { free(resamplebuff); resamplebuff=NULL; } if (ResampleCtx!=NULL) { audio_resample_close(ResampleCtx); ResampleCtx=NULL; } } if (totle_samplenum<=sample_rate*5) { PostMessage(mParentHwnd,mMsg,FAILED_TAG,(LPARAM)10); return 10; } PostMessage(mParentHwnd,mMsg,FINISH_TAG,NULL); return 0; }
static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap) { TTAContext *c = s->priv_data; AVStream *st; int i, channels, bps, samplerate, datalen, framelen; uint64_t framepos, start_offset; ff_id3v2_read(s); if (!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX)) ff_id3v1_read(s); start_offset = url_ftell(s->pb); if (get_le32(s->pb) != AV_RL32("TTA1")) return -1; // not tta file url_fskip(s->pb, 2); // FIXME: flags channels = get_le16(s->pb); bps = get_le16(s->pb); samplerate = get_le32(s->pb); if(samplerate <= 0 || samplerate > 1000000){ av_log(s, AV_LOG_ERROR, "nonsense samplerate\n"); return -1; } datalen = get_le32(s->pb); if(datalen < 0){ av_log(s, AV_LOG_ERROR, "nonsense datalen\n"); return -1; } url_fskip(s->pb, 4); // header crc framelen = samplerate*256/245; c->totalframes = datalen / framelen + ((datalen % framelen) ? 1 : 0); c->currentframe = 0; if(c->totalframes >= UINT_MAX/sizeof(uint32_t)){ av_log(s, AV_LOG_ERROR, "totalframes too large\n"); return -1; } st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); av_set_pts_info(st, 64, 1, samplerate); st->start_time = 0; st->duration = datalen; framepos = url_ftell(s->pb) + 4*c->totalframes + 4; for (i = 0; i < c->totalframes; i++) { uint32_t size = get_le32(s->pb); av_add_index_entry(st, framepos, i*framelen, size, 0, AVINDEX_KEYFRAME); framepos += size; } url_fskip(s->pb, 4); // seektable crc st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = CODEC_ID_TTA; st->codec->channels = channels; st->codec->sample_rate = samplerate; st->codec->bits_per_coded_sample = bps; st->codec->extradata_size = url_ftell(s->pb) - start_offset; if(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){ //this check is redundant as get_buffer should fail av_log(s, AV_LOG_ERROR, "extradata_size too large\n"); return -1; } st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE); url_fseek(s->pb, start_offset, SEEK_SET); get_buffer(s->pb, st->codec->extradata, st->codec->extradata_size); return 0; }