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ffmpeg.wasm-core
Commit 97468463 authored by Michael Niedermayer's avatar Michael Niedermayer
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Merge commit 'aaa44d02' 

* commit 'aaa44d02':
  dca: support mixing LFE in dca_downmix.

Conflicts:
	libavcodec/dcadec.c
Merged-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parents 7ea9c4a9 aaa44d02
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Showing with 73 additions and 65 deletions
libavcodec/dcadata.h
View file @ 97468463
......@@ -7551,17 +7551,17 @@ static const float dca_dmixtable[241] = {
1.000000,
};
static const float dca_default_coeffs[10][5][2] = {
{ { 0.707107, 0.707107 }, }, // A
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, }, // A + B (dual mono)
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, }, // L + R (stereo)
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, }, // (L+R) + (L-R) (sum-difference)
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, }, // LT + RT (left and right total)
{ { 0.501187, 0.501187 }, { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, }, // C + L + R
{ { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.501187 }, }, // L + R + S
{ { 0.501187, 0.501187 }, { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.501187 }, }, // C + L + R + S
{ { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.000000 }, { 0.000000, 0.501187 }, }, // L + R + SL + SR
{ { 0.501187, 0.501187 }, { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.000000 }, { 0.000000, 0.501187 }, }, // C + L + R + SL + SR
static const float dca_default_coeffs[10][6][2] = {
{ { 0.707107, 0.707107 }, { 0.000000, 0.000000 }, }, // A [LFE]
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, { 0.000000, 0.000000 }, }, // A + B (dual mono) [LFE]
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, { 0.000000, 0.000000 }, }, // L + R (stereo) [LFE]
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, { 0.000000, 0.000000 }, }, // (L+R) + (L-R) (sum-difference) [LFE]
{ { 1.000000, 0.000000 }, { 0.000000, 1.000000 }, { 0.000000, 0.000000 }, }, // LT + RT (left and right total) [LFE]
{ { 0.501187, 0.501187 }, { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.000000, 0.000000 }, }, // C + L + R [LFE]
{ { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.501187 }, { 0.000000, 0.000000 }, }, // L + R + S [LFE]
{ { 0.501187, 0.501187 }, { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.501187 }, { 0.000000, 0.000000 }, }, // C + L + R + S [LFE]
{ { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.000000 }, { 0.000000, 0.501187 }, { 0.000000, 0.000000 }, }, // L + R + SL + SR [LFE]
{ { 0.501187, 0.501187 }, { 0.707107, 0.000000 }, { 0.000000, 0.707107 }, { 0.501187, 0.000000 }, { 0.000000, 0.501187 }, { 0.000000, 0.000000 }, }, // C + L + R + SL + SR [LFE]
};
/* downmix coeffs
......
libavcodec/dcadec.c
View file @ 97468463
......@@ -399,7 +399,7 @@ typedef struct {
int scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2]; ///< scale factors (2 if transient)
int joint_huff[DCA_PRIM_CHANNELS_MAX]; ///< joint subband scale factors codebook
int joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< joint subband scale factors
float downmix_coef[DCA_PRIM_CHANNELS_MAX][2]; ///< stereo downmix coefficients
float downmix_coef[DCA_PRIM_CHANNELS_MAX + 1][2]; ///< stereo downmix coefficients
int dynrange_coef; ///< dynamic range coefficient
/* Core substream's embedded downmix coefficients (cf. ETSI TS 102 114 V1.4.1)
......@@ -1152,8 +1152,8 @@ static void lfe_interpolation_fir(DCAContext *s, int decimation_select,
op2 \
}
static void dca_downmix(float **samples, int srcfmt,
float coef[DCA_PRIM_CHANNELS_MAX][2],
static void dca_downmix(float **samples, int srcfmt, int lfe_present,
float coef[DCA_PRIM_CHANNELS_MAX + 1][2],
const int8_t *channel_mapping)
{
int c, l, r, sl, sr, s;
......@@ -1203,6 +1203,14 @@ static void dca_downmix(float **samples, int srcfmt,
MIX_REAR2(samples, sl, sr, 3, coef));
break;
}
if (lfe_present) {
int lf_buf = dca_lfe_index[srcfmt];
int lf_idx = dca_channels [srcfmt];
for (i = 0; i < 256; i++) {
samples[0][i] += samples[lf_buf][i] * coef[lf_idx][0];
samples[1][i] += samples[lf_buf][i] * coef[lf_idx][1];
}
}
}
......@@ -1410,12 +1418,6 @@ static int dca_filter_channels(DCAContext *s, int block_index)
M_SQRT1_2 / 32768.0 /* pcm_to_double[s->source_pcm_res] */);
}
/* Down mixing */
if (s->prim_channels > 2 &&
s->avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
dca_downmix(s->samples_chanptr, s->amode, s->downmix_coef, s->channel_order_tab);
}
/* Generate LFE samples for this subsubframe FIXME!!! */
if (s->output & DCA_LFE) {
lfe_interpolation_fir(s, s->lfe, 2 * s->lfe,
......@@ -1425,6 +1427,13 @@ static int dca_filter_channels(DCAContext *s, int block_index)
/* Outputs 20bits pcm samples */
}
/* Downmixing to Stereo */
if (s->prim_channels + !!s->lfe > 2 &&
s->avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
dca_downmix(s->samples_chanptr, s->amode, !!s->lfe, s->downmix_coef,
s->channel_order_tab);
}
return 0;
}
......@@ -2145,53 +2154,52 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
/* record number of core channels incase less than max channels are requested */
num_core_channels = s->prim_channels;
if (s->prim_channels > 2 &&
if (s->prim_channels + !!s->lfe > 2 &&
avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
/* Stereo downmix coefficients
*
* The decoder can only downmix to 2-channel, so we need to ensure
* embedded downmix coefficients are actually targeting 2-channel.
*
* Coefficients for the LFE channel are ignored (not supported) */
if (s->core_downmix && (s->core_downmix_amode == DCA_STEREO ||
s->core_downmix_amode == DCA_STEREO_TOTAL)) {
int sign, code;
for (i = 0; i < s->prim_channels; i++) {
sign = s->core_downmix_codes[i][0] & 0x100 ? 1 : -1;
code = s->core_downmix_codes[i][0] & 0x0FF;
s->downmix_coef[i][0] = (!code ? 0.0f :
sign * dca_dmixtable[code - 1]);
sign = s->core_downmix_codes[i][1] & 0x100 ? 1 : -1;
code = s->core_downmix_codes[i][1] & 0x0FF;
s->downmix_coef[i][1] = (!code ? 0.0f :
sign * dca_dmixtable[code - 1]);
}
} else {
int am = s->amode & DCA_CHANNEL_MASK;
if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid channel mode %d\n", am);
return AVERROR_INVALIDDATA;
}
if (s->prim_channels > FF_ARRAY_ELEMS(dca_default_coeffs[0])) {
avpriv_request_sample(s->avctx, "Downmixing %d channels",
s->prim_channels);
return AVERROR_PATCHWELCOME;
/* Stereo downmix coefficients
*
* The decoder can only downmix to 2-channel, so we need to ensure
* embedded downmix coefficients are actually targeting 2-channel.
*/
if (s->core_downmix && (s->core_downmix_amode == DCA_STEREO ||
s->core_downmix_amode == DCA_STEREO_TOTAL)) {
int sign, code;
for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
sign = s->core_downmix_codes[i][0] & 0x100 ? 1 : -1;
code = s->core_downmix_codes[i][0] & 0x0FF;
s->downmix_coef[i][0] = (!code ? 0.0f :
sign * dca_dmixtable[code - 1]);
sign = s->core_downmix_codes[i][1] & 0x100 ? 1 : -1;
code = s->core_downmix_codes[i][1] & 0x0FF;
s->downmix_coef[i][1] = (!code ? 0.0f :
sign * dca_dmixtable[code - 1]);
}
} else {
int am = s->amode & DCA_CHANNEL_MASK;
if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid channel mode %d\n", am);
return AVERROR_INVALIDDATA;
}
if (s->prim_channels + !!s->lfe >
FF_ARRAY_ELEMS(dca_default_coeffs[0])) {
avpriv_request_sample(s->avctx, "Downmixing %d channels",
s->prim_channels + !!s->lfe);
return AVERROR_PATCHWELCOME;
}
for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
s->downmix_coef[i][0] = dca_default_coeffs[am][i][0];
s->downmix_coef[i][1] = dca_default_coeffs[am][i][1];
}
}
for (i = 0; i < s->prim_channels; i++) {
s->downmix_coef[i][0] = dca_default_coeffs[am][i][0];
s->downmix_coef[i][1] = dca_default_coeffs[am][i][1];
av_dlog(s->avctx, "Stereo downmix coeffs:\n");
for (i = 0; i < s->prim_channels + !!s->lfe; i++) {
av_dlog(s->avctx, "L, input channel %d = %f\n", i,
s->downmix_coef[i][0]);
av_dlog(s->avctx, "R, input channel %d = %f\n", i,
s->downmix_coef[i][1]);
}
}
av_dlog(s->avctx, "Stereo downmix coeffs:\n");
for (i = 0; i < s->prim_channels; i++) {
av_dlog(s->avctx, "L, input channel %d = %f\n", i,
s->downmix_coef[i][0]);
av_dlog(s->avctx, "R, input channel %d = %f\n", i,
s->downmix_coef[i][1]);
}
av_dlog(s->avctx, "\n");
av_dlog(s->avctx, "\n");
}
if (s->ext_coding)
......@@ -2348,7 +2356,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
return AVERROR_INVALIDDATA;
}
if (s->prim_channels > 2 &&
if (s->prim_channels + !!s->lfe > 2 &&
avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
channels = 2;
s->output = DCA_STEREO;
......
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