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avcodec/dcaenc: unbreak >4 channel support 

LFE channel is still broken, search for FIXME.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-09-17 19:13:52 +00:00
parent 763ffa2029
commit d4a9e6c1a1
1 changed files with 18 additions and 6 deletions
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24
libavcodec/dcaenc.c
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@ -58,6 +58,7 @@ typedef struct DCAEncContext {
int lfe_scale_factor;
softfloat lfe_quant;
int32_t lfe_peak_cb;
const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe
int32_t history[512][MAX_CHANNELS]; /* This is a circular buffer */
int32_t subband[SUBBAND_SAMPLES][DCAENC_SUBBANDS][MAX_CHANNELS];
@ -133,8 +134,12 @@ static int encode_init(AVCodecContext *avctx)
return AVERROR_PATCHWELCOME;
}
if (c->lfe_channel)
if (c->lfe_channel) {
c->fullband_channels--;
c->channel_order_tab = ff_dca_channel_reorder_lfe[c->channel_config];
} else {
c->channel_order_tab = ff_dca_channel_reorder_nolfe[c->channel_config];
}
for (i = 0; i < 9; i++) {
if (sample_rates[i] == avctx->sample_rate)
@ -243,6 +248,7 @@ static void subband_transform(DCAEncContext *c, const int32_t *input)
/* History is copied because it is also needed for PSY */
int32_t hist[512];
int hist_start = 0;
const int chi = c->channel_order_tab[ch];
for (i = 0; i < 512; i++)
hist[i] = c->history[i][ch];
@ -279,7 +285,7 @@ static void subband_transform(DCAEncContext *c, const int32_t *input)
/* Copy in 32 new samples from input */
for (i = 0; i < 32; i++)
hist[i + hist_start] = input[(subs * 32 + i) * c->channels + ch];
hist[i + hist_start] = input[(subs * 32 + i) * c->channels + chi];
hist_start = (hist_start + 32) & 511;
}
}
@ -288,6 +294,7 @@ static void subband_transform(DCAEncContext *c, const int32_t *input)
static void lfe_downsample(DCAEncContext *c, const int32_t *input)
{
/* FIXME: make 128x LFE downsampling possible */
const int lfech = ff_dca_lfe_index[c->channel_config];
int i, j, lfes;
int32_t hist[512];
int32_t accum;
@ -309,7 +316,7 @@ static void lfe_downsample(DCAEncContext *c, const int32_t *input)
/* Copy in 64 new samples from input */
for (i = 0; i < 64; i++)
hist[i + hist_start] = input[(lfes * 64 + i) * c->channels + c->channels - 1];
hist[i + hist_start] = input[(lfes * 64 + i) * c->channels + lfech];
hist_start = (hist_start + 64) & 511;
}
@ -497,10 +504,12 @@ static void calc_masking(DCAEncContext *c, const int32_t *input)
for (ssf = 0; ssf < SUBSUBFRAMES; ssf++)
for (ch = 0; ch < c->fullband_channels; ch++) {
const int chi = c->channel_order_tab[ch];
for (i = 0, k = 128 + 256 * ssf; k < 512; i++, k++)
data[i] = c->history[k][ch];
for (k -= 512; i < 512; i++, k++)
data[i] = input[k * c->channels + ch];
data[i] = input[k * c->channels + chi];
adjust_jnd(c->samplerate_index, data, c->masking_curve_cb[ssf]);
}
for (i = 0; i < 256; i++) {
@ -632,8 +641,11 @@ static void shift_history(DCAEncContext *c, const int32_t *input)
int k, ch;
for (k = 0; k < 512; k++)
for (ch = 0; ch < c->channels; ch++)
c->history[k][ch] = input[k * c->channels + ch];
for (ch = 0; ch < c->channels; ch++) {
const int chi = c->channel_order_tab[ch];
c->history[k][ch] = input[k * c->channels + chi];
}
}
static int32_t quantize_value(int32_t value, softfloat quant)