static int sox_read_header(AVFormatContext *s) { AVIOContext *pb = s->pb; unsigned header_size, comment_size; double sample_rate, sample_rate_frac; AVStream *st; st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; if (avio_rl32(pb) == SOX_TAG) { st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE; header_size = avio_rl32(pb); avio_skip(pb, 8); /* sample count */ sample_rate = av_int2double(avio_rl64(pb)); st->codecpar->channels = avio_rl32(pb); comment_size = avio_rl32(pb); } else { st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE; header_size = avio_rb32(pb); avio_skip(pb, 8); /* sample count */ sample_rate = av_int2double(avio_rb64(pb)); st->codecpar->channels = avio_rb32(pb); comment_size = avio_rb32(pb); } if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) { av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size); return AVERROR_INVALIDDATA; } if (sample_rate <= 0 || sample_rate > INT_MAX) { av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate); return AVERROR_INVALIDDATA; } sample_rate_frac = sample_rate - floor(sample_rate); if (sample_rate_frac) av_log(s, AV_LOG_WARNING, "truncating fractional part of sample rate (%f)\n", sample_rate_frac); if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size || st->codecpar->channels > 65535) /* Reserve top 16 bits */ { av_log(s, AV_LOG_ERROR, "invalid header\n"); return AVERROR_INVALIDDATA; } if (comment_size && comment_size < UINT_MAX) { char *comment = av_malloc(comment_size+1); if(!comment) return AVERROR(ENOMEM); if (avio_read(pb, comment, comment_size) != comment_size) { av_freep(&comment); return AVERROR(EIO); } comment[comment_size] = 0; av_dict_set(&s->metadata, "comment", comment, AV_DICT_DONT_STRDUP_VAL); } avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size); st->codecpar->sample_rate = sample_rate; st->codecpar->bits_per_coded_sample = 32; st->codecpar->bit_rate = st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample * st->codecpar->channels; st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8; avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); return 0; }