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avcodec/siren: MSN Siren decoder
Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Peter Ross <pross@xvid.org>
This commit is contained in:
Peter Ross
parent
b9426f371a
commit
c655a734b1
@ -17,6 +17,7 @@ version <next>:
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- grayworld video filter
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- AV1 Low overhead bitstream format muxer
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- swscale slice threading
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- MSN Siren decoder
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version 4.4:
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@ -508,6 +508,7 @@ OBJS-$(CONFIG_MSMPEG4V2_DECODER) += msmpeg4dec.o msmpeg4.o msmpeg4data.o
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OBJS-$(CONFIG_MSMPEG4V2_ENCODER) += msmpeg4enc.o msmpeg4.o msmpeg4data.o
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OBJS-$(CONFIG_MSMPEG4V3_DECODER) += msmpeg4dec.o msmpeg4.o msmpeg4data.o
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OBJS-$(CONFIG_MSMPEG4V3_ENCODER) += msmpeg4enc.o msmpeg4.o msmpeg4data.o
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OBJS-$(CONFIG_MSNSIREN_DECODER) += siren.o
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OBJS-$(CONFIG_MSP2_DECODER) += msp2dec.o
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OBJS-$(CONFIG_MSRLE_DECODER) += msrle.o msrledec.o
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OBJS-$(CONFIG_MSS1_DECODER) += mss1.o mss12.o
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@ -479,6 +479,7 @@ extern const AVCodec ff_mp3on4float_decoder;
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extern const AVCodec ff_mp3on4_decoder;
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extern const AVCodec ff_mpc7_decoder;
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extern const AVCodec ff_mpc8_decoder;
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extern const AVCodec ff_msnsiren_decoder;
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extern const AVCodec ff_nellymoser_encoder;
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extern const AVCodec ff_nellymoser_decoder;
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extern const AVCodec ff_on2avc_decoder;
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@ -3222,6 +3222,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
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.long_name = NULL_IF_CONFIG_SMALL("MobiClip FastAudio"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
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},
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{
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.id = AV_CODEC_ID_MSNSIREN,
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.type = AVMEDIA_TYPE_AUDIO,
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.name = "msnsiren",
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.long_name = NULL_IF_CONFIG_SMALL("MSN Siren"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
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},
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/* subtitle codecs */
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{
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@ -514,6 +514,7 @@ enum AVCodecID {
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AV_CODEC_ID_SIREN,
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AV_CODEC_ID_HCA,
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AV_CODEC_ID_FASTAUDIO,
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AV_CODEC_ID_MSNSIREN,
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/* subtitle codecs */
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AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
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@ -359,11 +359,13 @@ static const float noise_category6[21] = {
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typedef struct SirenContext {
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GetBitContext gb;
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int microsoft;
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int rate_control_possibilities;
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int esf_adjustment;
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int number_of_regions;
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int scale_factor;
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int sample_rate_bits;
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int checksum_bits;
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unsigned dw1, dw2, dw3, dw4;
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@ -421,6 +423,15 @@ static av_cold int siren_init(AVCodecContext *avctx)
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if (!s->fdsp)
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return AVERROR(ENOMEM);
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s->microsoft = avctx->codec->id == AV_CODEC_ID_MSNSIREN;
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if (s->microsoft) {
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s->esf_adjustment = -2;
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s->number_of_regions = 14;
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s->scale_factor = 1;
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s->sample_rate_bits = 2;
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s->checksum_bits = 4;
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}
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return av_tx_init(&s->tx_ctx, &s->tx_fn, AV_TX_FLOAT_MDCT, 1, FRAME_SIZE, &scale, 0);
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}
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@ -626,6 +637,20 @@ static int decode_vector(SirenContext *s, int number_of_regions,
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coefs_ptr = coefs + (region * REGION_SIZE);
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if (category == 5 && s->microsoft) {
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i = 0;
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for (j = 0; j < REGION_SIZE; j++) {
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if (*coefs_ptr != 0) {
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i++;
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if (fabs(*coefs_ptr) > 2.0 * decoder_standard_deviation[region]) {
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i += 3;
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}
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}
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coefs_ptr++;
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}
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noise = decoder_standard_deviation[region] * noise_category5[i];
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} else
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if (category == 5 || category == 6) {
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i = 0;
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for (j = 0; j < REGION_SIZE; j++) {
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@ -675,10 +700,22 @@ static int siren_decode(AVCodecContext *avctx, void *data,
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AVFrame *frame = data;
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int ret, number_of_valid_coefs = 20 * s->number_of_regions;
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int frame_error = 0, rate_control = 0;
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int bits_per_frame;
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if (s->microsoft) {
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bits_per_frame = avctx->sample_rate / 50;
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if (avpkt->size < bits_per_frame / 8)
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return AVERROR_INVALIDDATA;
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if ((ret = init_get_bits(gb, avpkt->data, bits_per_frame - s->checksum_bits)) < 0)
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return ret;
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} else
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if ((ret = init_get_bits8(gb, avpkt->data, avpkt->size)) < 0)
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return ret;
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skip_bits(gb, s->sample_rate_bits);
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decode_envelope(s, gb, s->number_of_regions,
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s->decoder_standard_deviation,
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s->absolute_region_power_index, s->esf_adjustment);
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@ -697,7 +734,7 @@ static int siren_decode(AVCodecContext *avctx, void *data,
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ret = decode_vector(s, s->number_of_regions, get_bits_left(gb),
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s->decoder_standard_deviation, s->power_categories,
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s->imdct_in, s->scale_factor);
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if (ret < 0)
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if (ret < 0 && !s->microsoft)
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return ret;
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if (get_bits_left(gb) > 0) {
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@ -715,6 +752,8 @@ static int siren_decode(AVCodecContext *avctx, void *data,
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frame_error = 1;
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}
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skip_bits(gb, s->checksum_bits);
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if (frame_error) {
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memcpy(s->imdct_in, s->backup_frame, number_of_valid_coefs * sizeof(float));
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memset(s->backup_frame, 0, number_of_valid_coefs * sizeof(float));
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@ -738,7 +777,7 @@ static int siren_decode(AVCodecContext *avctx, void *data,
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*got_frame = 1;
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return avpkt->size;
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return s->microsoft ? bits_per_frame / 8 : avpkt->size;
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}
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static av_cold void siren_flush(AVCodecContext *avctx)
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@ -775,3 +814,19 @@ const AVCodec ff_siren_decoder = {
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
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FF_CODEC_CAP_INIT_CLEANUP,
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};
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const AVCodec ff_msnsiren_decoder = {
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.name = "msnsiren",
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.long_name = NULL_IF_CONFIG_SMALL("MSN Siren"),
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.priv_data_size = sizeof(SirenContext),
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_MSNSIREN,
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.init = siren_init,
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.close = siren_close,
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.decode = siren_decode,
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.flush = siren_flush,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
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FF_CODEC_CAP_INIT_CLEANUP,
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};
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@ -29,7 +29,7 @@
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#define LIBAVCODEC_VERSION_MAJOR 59
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#define LIBAVCODEC_VERSION_MINOR 7
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#define LIBAVCODEC_VERSION_MICRO 101
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#define LIBAVCODEC_VERSION_MICRO 102
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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LIBAVCODEC_VERSION_MINOR, \
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@ -560,6 +560,7 @@ const AVCodecTag ff_codec_wav_tags[] = {
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{ AV_CODEC_ID_DVAUDIO, 0x0215 },
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{ AV_CODEC_ID_DVAUDIO, 0x0216 },
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{ AV_CODEC_ID_ATRAC3, 0x0270 },
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{ AV_CODEC_ID_MSNSIREN, 0x028E },
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{ AV_CODEC_ID_ADPCM_G722, 0x028F },
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{ AV_CODEC_ID_IMC, 0x0401 },
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{ AV_CODEC_ID_IAC, 0x0402 },
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