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#include "config_components.h" |
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "internal.h" |
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#include "rawdec.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavcodec/mlp.h" |
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#include "libavcodec/mlp_parse.h" |
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static int av_always_inline mlp_thd_probe(const AVProbeData *p, uint32_t sync) |
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{ |
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const uint8_t *buf, *last_buf = p->buf, *end = p->buf + p->buf_size; |
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int valid = 0, size = 0; |
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int nsubframes = 0; |
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for (buf = p->buf; buf + 8 <= end; buf++) { |
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if (AV_RB32(buf + 4) == sync) { |
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if (last_buf + size == buf) { |
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valid += 1 + nsubframes / 8; |
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} |
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nsubframes = 0; |
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last_buf = buf; |
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size = (AV_RB16(buf) & 0xfff) * 2; |
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} else if (buf - last_buf == size) { |
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nsubframes++; |
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size += (AV_RB16(buf) & 0xfff) * 2; |
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} |
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} |
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if (valid >= 100) |
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return AVPROBE_SCORE_MAX; |
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return 0; |
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} |
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static int mlp_read_header(AVFormatContext *s) |
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{ |
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int ret = ff_raw_audio_read_header(s); |
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if (ret < 0) |
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return ret; |
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ret = ffio_ensure_seekback(s->pb, 10); |
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if (ret == 0) { |
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uint8_t buffer[10]; |
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int read, sample_rate = 0; |
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read = avio_read(s->pb, buffer, 10); |
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if (read == 10) { |
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switch (buffer[7]) { |
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case SYNC_TRUEHD: |
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sample_rate = mlp_samplerate(buffer[8] >> 4); |
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break; |
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case SYNC_MLP: |
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sample_rate = mlp_samplerate(buffer[9] >> 4); |
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break; |
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} |
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if (sample_rate) |
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avpriv_set_pts_info(s->streams[0], 64, 1, sample_rate); |
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} |
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if (read > 0) |
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avio_seek(s->pb, -read, SEEK_CUR); |
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} |
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return 0; |
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} |
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#if CONFIG_MLP_DEMUXER |
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static int mlp_probe(const AVProbeData *p) |
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{ |
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return mlp_thd_probe(p, 0xf8726fbb); |
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} |
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const AVInputFormat ff_mlp_demuxer = { |
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.name = "mlp", |
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.long_name = NULL_IF_CONFIG_SMALL("raw MLP"), |
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.read_probe = mlp_probe, |
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.read_header = mlp_read_header, |
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.read_packet = ff_raw_read_partial_packet, |
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.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS, |
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.extensions = "mlp", |
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.raw_codec_id = AV_CODEC_ID_MLP, |
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.priv_data_size = sizeof(FFRawDemuxerContext), |
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.priv_class = &ff_raw_demuxer_class, |
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}; |
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#endif |
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#if CONFIG_TRUEHD_DEMUXER |
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static int thd_probe(const AVProbeData *p) |
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{ |
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return mlp_thd_probe(p, 0xf8726fba); |
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} |
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const AVInputFormat ff_truehd_demuxer = { |
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.name = "truehd", |
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.long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"), |
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.read_probe = thd_probe, |
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.read_header = mlp_read_header, |
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.read_packet = ff_raw_read_partial_packet, |
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.flags = AVFMT_GENERIC_INDEX | AVFMT_NOTIMESTAMPS, |
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.extensions = "thd", |
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.raw_codec_id = AV_CODEC_ID_TRUEHD, |
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.priv_data_size = sizeof(FFRawDemuxerContext), |
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.priv_class = &ff_raw_demuxer_class, |
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}; |
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#endif |
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