#include <stdint.h>
#include "avcodec.h"
+#include "dsputil.h"
#include "libavutil/intreadwrite.h"
#include "get_bits.h"
#include "libavutil/crc.h"
//! Whether the LSBs of the matrix output are encoded in the bitstream.
uint8_t lsb_bypass[MAX_MATRICES];
//! Matrix coefficients, stored as 2.14 fixed point.
- int32_t matrix_coeff[MAX_MATRICES][MAX_CHANNELS+2];
+ int32_t matrix_coeff[MAX_MATRICES][MAX_CHANNELS];
//! Left shift to apply to noise values in 0x31eb substreams.
uint8_t matrix_noise_shift[MAX_MATRICES];
//@}
int8_t noise_buffer[MAX_BLOCKSIZE_POW2];
int8_t bypassed_lsbs[MAX_BLOCKSIZE][MAX_CHANNELS];
- int32_t sample_buffer[MAX_BLOCKSIZE][MAX_CHANNELS+2];
+ int32_t sample_buffer[MAX_BLOCKSIZE][MAX_CHANNELS];
+
+ DSPContext dsp;
} MLPDecodeContext;
static VLC huff_vlc[3];
static av_cold void init_static(void)
{
- INIT_VLC_STATIC(&huff_vlc[0], VLC_BITS, 18,
- &ff_mlp_huffman_tables[0][0][1], 2, 1,
- &ff_mlp_huffman_tables[0][0][0], 2, 1, 512);
- INIT_VLC_STATIC(&huff_vlc[1], VLC_BITS, 16,
- &ff_mlp_huffman_tables[1][0][1], 2, 1,
- &ff_mlp_huffman_tables[1][0][0], 2, 1, 512);
- INIT_VLC_STATIC(&huff_vlc[2], VLC_BITS, 15,
- &ff_mlp_huffman_tables[2][0][1], 2, 1,
- &ff_mlp_huffman_tables[2][0][0], 2, 1, 512);
+ if (!huff_vlc[0].bits) {
+ INIT_VLC_STATIC(&huff_vlc[0], VLC_BITS, 18,
+ &ff_mlp_huffman_tables[0][0][1], 2, 1,
+ &ff_mlp_huffman_tables[0][0][0], 2, 1, 512);
+ INIT_VLC_STATIC(&huff_vlc[1], VLC_BITS, 16,
+ &ff_mlp_huffman_tables[1][0][1], 2, 1,
+ &ff_mlp_huffman_tables[1][0][0], 2, 1, 512);
+ INIT_VLC_STATIC(&huff_vlc[2], VLC_BITS, 15,
+ &ff_mlp_huffman_tables[2][0][1], 2, 1,
+ &ff_mlp_huffman_tables[2][0][0], 2, 1, 512);
+ }
ff_mlp_init_crc();
}
m->avctx = avctx;
for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
m->substream[substr].lossless_check_data = 0xffffffff;
+ dsputil_init(&m->dsp, avctx);
return 0;
}
: MAX_MATRIX_CHANNEL_TRUEHD;
sync_word = get_bits(gbp, 13);
- s->noise_type = get_bits1(gbp);
- if ((m->avctx->codec_id == CODEC_ID_MLP && s->noise_type) ||
- sync_word != 0x31ea >> 1) {
+ if (sync_word != 0x31ea >> 1) {
av_log(m->avctx, AV_LOG_ERROR,
"restart header sync incorrect (got 0x%04x)\n", sync_word);
return -1;
}
+ s->noise_type = get_bits1(gbp);
+
+ if (m->avctx->codec_id == CODEC_ID_MLP && s->noise_type) {
+ av_log(m->avctx, AV_LOG_ERROR, "MLP must have 0x31ea sync word.\n");
+ return -1;
+ }
+
skip_bits(gbp, 16); /* Output timestamp */
s->min_channel = get_bits(gbp, 4);
return -1;
}
+ /* This should happen for TrueHD streams with >6 channels and MLP's noise
+ * type. It is not yet known if this is allowed. */
+ if (s->max_channel > MAX_MATRIX_CHANNEL_MLP && !s->noise_type) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Number of channels %d is larger than the maximum supported "
+ "by the decoder. %s\n", s->max_channel+2, sample_message);
+ return -1;
+ }
+
if (s->min_channel > s->max_channel) {
av_log(m->avctx, AV_LOG_ERROR,
"Substream min channel cannot be greater than max channel.\n");
if (m->avctx->request_channels > 0
&& s->max_channel + 1 >= m->avctx->request_channels
&& substr < m->max_decoded_substream) {
- av_log(m->avctx, AV_LOG_INFO,
+ av_log(m->avctx, AV_LOG_DEBUG,
"Extracting %d channel downmix from substream %d. "
"Further substreams will be skipped.\n",
s->max_channel + 1, substr);
fp->order = order;
if (order > 0) {
+ int32_t *fcoeff = m->channel_params[channel].coeff[filter];
int coeff_bits, coeff_shift;
fp->shift = get_bits(gbp, 4);
}
for (i = 0; i < order; i++)
- fp->coeff[i] = get_sbits(gbp, coeff_bits) << coeff_shift;
+ fcoeff[i] = get_sbits(gbp, coeff_bits) << coeff_shift;
if (get_bits1(gbp)) {
int state_bits, state_shift;
return -1;
}
/* The FIR and IIR filters must have the same precision.
- * To simplify the filtering code, only the precision of the
- * FIR filter is considered. If only the IIR filter is employed,
- * the FIR filter precision is set to that of the IIR filter, so
- * that the filtering code can use it. */
+ * To simplify the filtering code, only the precision of the
+ * FIR filter is considered. If only the IIR filter is employed,
+ * the FIR filter precision is set to that of the IIR filter, so
+ * that the filtering code can use it. */
if (!fir->order && iir->order)
fir->shift = iir->shift;
unsigned int channel)
{
SubStream *s = &m->substream[substr];
- int32_t firbuf[MAX_BLOCKSIZE + MAX_FIR_ORDER];
- int32_t iirbuf[MAX_BLOCKSIZE + MAX_IIR_ORDER];
+ const int32_t *fircoeff = m->channel_params[channel].coeff[FIR];
+ int32_t state_buffer[NUM_FILTERS][MAX_BLOCKSIZE + MAX_FIR_ORDER];
+ int32_t *firbuf = state_buffer[FIR] + MAX_BLOCKSIZE;
+ int32_t *iirbuf = state_buffer[IIR] + MAX_BLOCKSIZE;
FilterParams *fir = &m->channel_params[channel].filter_params[FIR];
FilterParams *iir = &m->channel_params[channel].filter_params[IIR];
unsigned int filter_shift = fir->shift;
int32_t mask = MSB_MASK(s->quant_step_size[channel]);
- int index = MAX_BLOCKSIZE;
- int i;
-
- memcpy(&firbuf[index], fir->state, MAX_FIR_ORDER * sizeof(int32_t));
- memcpy(&iirbuf[index], iir->state, MAX_IIR_ORDER * sizeof(int32_t));
-
- for (i = 0; i < s->blocksize; i++) {
- int32_t residual = m->sample_buffer[i + s->blockpos][channel];
- unsigned int order;
- int64_t accum = 0;
- int32_t result;
-
- /* TODO: Move this code to DSPContext? */
- for (order = 0; order < fir->order; order++)
- accum += (int64_t) firbuf[index + order] * fir->coeff[order];
- for (order = 0; order < iir->order; order++)
- accum += (int64_t) iirbuf[index + order] * iir->coeff[order];
+ memcpy(firbuf, fir->state, MAX_FIR_ORDER * sizeof(int32_t));
+ memcpy(iirbuf, iir->state, MAX_IIR_ORDER * sizeof(int32_t));
- accum = accum >> filter_shift;
- result = (accum + residual) & mask;
-
- --index;
-
- firbuf[index] = result;
- iirbuf[index] = result - accum;
-
- m->sample_buffer[i + s->blockpos][channel] = result;
- }
+ m->dsp.mlp_filter_channel(firbuf, fircoeff,
+ fir->order, iir->order,
+ filter_shift, mask, s->blocksize,
+ &m->sample_buffer[s->blockpos][channel]);
- memcpy(fir->state, &firbuf[index], MAX_FIR_ORDER * sizeof(int32_t));
- memcpy(iir->state, &iirbuf[index], MAX_IIR_ORDER * sizeof(int32_t));
+ memcpy(fir->state, firbuf - s->blocksize, MAX_FIR_ORDER * sizeof(int32_t));
+ memcpy(iir->state, iirbuf - s->blocksize, MAX_IIR_ORDER * sizeof(int32_t));
}
/** Read a block of PCM residual data (or actual if no filtering active). */
length = (AV_RB16(buf) & 0xfff) * 2;
- if (length > buf_size)
+ if (length < 4 || length > buf_size)
return -1;
init_get_bits(&gb, (buf + 4), (length - 4) * 8);
return -1;
}
-#if CONFIG_MLP_DECODER
AVCodec mlp_decoder = {
"mlp",
CODEC_TYPE_AUDIO,
read_access_unit,
.long_name = NULL_IF_CONFIG_SMALL("MLP (Meridian Lossless Packing)"),
};
-#endif /* CONFIG_MLP_DECODER */
#if CONFIG_TRUEHD_DECODER
AVCodec truehd_decoder = {
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