int current_subframe;
int current_subsubframe;
+ /* XCh extension information */
+ int xch_present;
+ int xch_base_channel; ///< index of first (only) channel containing XCH data
+
int debug_flag; ///< used for suppressing repeated error messages output
DSPContext dsp;
FFTContext imdct;
}
/* Dynamic range coefficient */
- if (s->dynrange)
+ if (!base_channel && s->dynrange)
s->dynrange_coef = get_bits(&s->gb, 8);
/* Side information CRC check word */
/* downmixing routines */
#define MIX_REAR1(samples, si1, rs, coef) \
- samples[i] += samples[si1] * coef[rs][0]; \
- samples[i+256] += samples[si1] * coef[rs][1];
+ samples[i] += (samples[si1] - add_bias) * coef[rs][0]; \
+ samples[i+256] += (samples[si1] - add_bias) * coef[rs][1];
#define MIX_REAR2(samples, si1, si2, rs, coef) \
- samples[i] += samples[si1] * coef[rs][0] + samples[si2] * coef[rs+1][0]; \
- samples[i+256] += samples[si1] * coef[rs][1] + samples[si2] * coef[rs+1][1];
+ samples[i] += (samples[si1] - add_bias) * coef[rs][0] + (samples[si2] - add_bias) * coef[rs+1][0]; \
+ samples[i+256] += (samples[si1] - add_bias) * coef[rs][1] + (samples[si2] - add_bias) * coef[rs+1][1];
#define MIX_FRONT3(samples, coef) \
- t = samples[i]; \
- samples[i] = t * coef[0][0] + samples[i+256] * coef[1][0] + samples[i+512] * coef[2][0]; \
- samples[i+256] = t * coef[0][1] + samples[i+256] * coef[1][1] + samples[i+512] * coef[2][1];
+ t = samples[i+c] - add_bias; \
+ u = samples[i+l] - add_bias; \
+ v = samples[i+r] - add_bias; \
+ samples[i] = t * coef[0][0] + u * coef[1][0] + v * coef[2][0] + add_bias; \
+ samples[i+256] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1] + add_bias;
#define DOWNMIX_TO_STEREO(op1, op2) \
for (i = 0; i < 256; i++){ \
}
static void dca_downmix(float *samples, int srcfmt,
- int downmix_coef[DCA_PRIM_CHANNELS_MAX][2])
+ int downmix_coef[DCA_PRIM_CHANNELS_MAX][2],
+ const int8_t *channel_mapping, float add_bias)
{
+ int c,l,r,sl,sr,s;
int i;
- float t;
+ float t, u, v;
float coef[DCA_PRIM_CHANNELS_MAX][2];
for (i=0; i<DCA_PRIM_CHANNELS_MAX; i++) {
case DCA_STEREO:
break;
case DCA_3F:
+ c = channel_mapping[0] * 256;
+ l = channel_mapping[1] * 256;
+ r = channel_mapping[2] * 256;
DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef),);
break;
case DCA_2F1R:
- DOWNMIX_TO_STEREO(MIX_REAR1(samples, i + 512, 2, coef),);
+ s = channel_mapping[2] * 256;
+ DOWNMIX_TO_STEREO(MIX_REAR1(samples, i + s, 2, coef),);
break;
case DCA_3F1R:
+ c = channel_mapping[0] * 256;
+ l = channel_mapping[1] * 256;
+ r = channel_mapping[2] * 256;
+ s = channel_mapping[3] * 256;
DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef),
- MIX_REAR1(samples, i + 768, 3, coef));
+ MIX_REAR1(samples, i + s, 3, coef));
break;
case DCA_2F2R:
- DOWNMIX_TO_STEREO(MIX_REAR2(samples, i + 512, i + 768, 2, coef),);
+ sl = channel_mapping[2] * 256;
+ sr = channel_mapping[3] * 256;
+ DOWNMIX_TO_STEREO(MIX_REAR2(samples, i + sl, i + sr, 2, coef),);
break;
case DCA_3F2R:
+ c = channel_mapping[0] * 256;
+ l = channel_mapping[1] * 256;
+ r = channel_mapping[2] * 256;
+ sl = channel_mapping[3] * 256;
+ sr = channel_mapping[4] * 256;
DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef),
- MIX_REAR2(samples, i + 768, i + 1024, 3, coef));
+ MIX_REAR2(samples, i + sl, i + sr, 3, coef));
break;
}
}
/* Down mixing */
if (s->avctx->request_channels == 2 && s->prim_channels > 2) {
- dca_downmix(s->samples, s->amode, s->downmix_coef);
+ dca_downmix(s->samples, s->amode, s->downmix_coef, s->channel_order_tab, s->add_bias);
}
/* Generate LFE samples for this subsubframe FIXME!!! */
return src_size;
case DCA_MARKER_RAW_LE:
for (i = 0; i < (src_size + 1) >> 1; i++)
- *sdst++ = bswap_16(*ssrc++);
+ *sdst++ = av_bswap16(*ssrc++);
return src_size;
case DCA_MARKER_14B_BE:
case DCA_MARKER_14B_LE:
int lfe_samples;
int num_core_channels = 0;
int i;
- int xch_present = 0;
int16_t *samples = data;
DCAContext *s = avctx->priv_data;
int channels;
+ s->xch_present = 0;
s->dca_buffer_size = dca_convert_bitstream(buf, buf_size, s->dca_buffer, DCA_MAX_FRAME_SIZE);
if (s->dca_buffer_size == -1) {
av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n");
num_core_channels = s->prim_channels;
/* extensions start at 32-bit boundaries into bitstream */
- skip_bits(&s->gb, (-get_bits_count(&s->gb)) & 31);
+ skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31);
while(get_bits_left(&s->gb) >= 32) {
- uint32_t bits = get_bits(&s->gb, 32);
+ uint32_t bits = get_bits_long(&s->gb, 32);
switch(bits) {
case 0x5a5a5a5a: {
- int ext_base_ch = s->prim_channels;
- int ext_amode;
+ int ext_amode, xch_fsize;
+
+ s->xch_base_channel = s->prim_channels;
+
+ /* validate sync word using XCHFSIZE field */
+ xch_fsize = show_bits(&s->gb, 10);
+ if((s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize) &&
+ (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize + 1))
+ continue;
/* skip length-to-end-of-frame field for the moment */
skip_bits(&s->gb, 10);
}
/* much like core primary audio coding header */
- dca_parse_audio_coding_header(s, ext_base_ch);
+ dca_parse_audio_coding_header(s, s->xch_base_channel);
for (i = 0; i < (s->sample_blocks / 8); i++) {
- dca_decode_block(s, ext_base_ch, i);
+ dca_decode_block(s, s->xch_base_channel, i);
}
- xch_present = 1;
+ s->xch_present = 1;
break;
}
case 0x1d95f262:
break;
}
- skip_bits(&s->gb, (-get_bits_count(&s->gb)) & 31);
+ skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31);
}
channels = s->prim_channels + !!s->lfe;
if (s->amode<16) {
avctx->channel_layout = dca_core_channel_layout[s->amode];
- if (xch_present && (!avctx->request_channels ||
- avctx->request_channels > num_core_channels)) {
+ if (s->xch_present && (!avctx->request_channels ||
+ avctx->request_channels > num_core_channels + !!s->lfe)) {
avctx->channel_layout |= CH_BACK_CENTER;
if (s->lfe) {
avctx->channel_layout |= CH_LOW_FREQUENCY;
s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode];
}
} else {
+ channels = num_core_channels + !!s->lfe;
+ s->xch_present = 0; /* disable further xch processing */
if (s->lfe) {
avctx->channel_layout |= CH_LOW_FREQUENCY;
s->channel_order_tab = dca_channel_reorder_lfe[s->amode];
s->channel_order_tab = dca_channel_reorder_nolfe[s->amode];
}
- if (s->prim_channels > 0 &&
- s->channel_order_tab[s->prim_channels - 1] < 0)
+ if (channels > !!s->lfe &&
+ s->channel_order_tab[channels - 1 - !!s->lfe] < 0)
return -1;
if (avctx->request_channels == 2 && s->prim_channels > 2) {
unset. Ideally during the first probe for channels the crc should be checked
and only set avctx->channels when the crc is ok. Right now the decoder could
set the channels based on a broken first frame.*/
- if (!avctx->channels)
- avctx->channels = channels;
+ avctx->channels = channels;
if (*data_size < (s->sample_blocks / 8) * 256 * sizeof(int16_t) * channels)
return -1;
/* filter to get final output */
for (i = 0; i < (s->sample_blocks / 8); i++) {
dca_filter_channels(s, i);
+
+ /* If this was marked as a DTS-ES stream we need to subtract back- */
+ /* channel from SL & SR to remove matrixed back-channel signal */
+ if((s->source_pcm_res & 1) && s->xch_present) {
+ float* back_chan = s->samples + s->channel_order_tab[s->xch_base_channel] * 256;
+ float* lt_chan = s->samples + s->channel_order_tab[s->xch_base_channel - 2] * 256;
+ float* rt_chan = s->samples + s->channel_order_tab[s->xch_base_channel - 1] * 256;
+ int j;
+ for(j = 0; j < 256; ++j) {
+ lt_chan[j] -= (back_chan[j] - s->add_bias) * M_SQRT1_2;
+ rt_chan[j] -= (back_chan[j] - s->add_bias) * M_SQRT1_2;
+ }
+ }
+
s->dsp.float_to_int16_interleave(samples, s->samples_chanptr, 256, channels);
samples += 256 * channels;
}
projects / ffmpeg / blobdiff