*/
/**
- * @file dca.c
+ * @file libavcodec/dca.c
*/
#include <math.h>
* are never used so complete accuracy is not needed.
*
* L = left, R = right, C = center, S = surround, F = front, R = rear, T = total, OV = overhead.
- * S -> back, when both rear and back are configured move one of them to the side channel
+ * S -> side, when both rear and back are configured move one of them to the side channel
* OV -> center back
- * All 2 channel configurations -> CHANNEL_LAYOUT_STEREO
+ * All 2 channel configurations -> CH_LAYOUT_STEREO
*/
static const int64_t dca_core_channel_layout[] = {
- CHANNEL_FRONT_CENTER, ///< 1, A
- CHANNEL_LAYOUT_STEREO, ///< 2, A + B (dual mono)
- CHANNEL_LAYOUT_STEREO, ///< 2, L + R (stereo)
- CHANNEL_LAYOUT_STEREO, ///< 2, (L+R) + (L-R) (sum-difference)
- CHANNEL_LAYOUT_STEREO, ///< 2, LT +RT (left and right total)
- CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER, ///< 3, C+L+R
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_CENTER, ///< 3, L+R+S
- CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER, ///< 4, C + L + R+ S
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 4, L + R+ SL+SR
- CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 5, C + L + R+ SL+SR
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER, ///< 6, CL + CR + L + R + SL + SR
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER, ///< 6, C + L + R+ LR + RR + OV
- CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_BACK_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 6, CF+ CR+LF+ RF+LR + RR
- CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 7, CL + C + CR + L + R + SL + SR
- CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_SIDE_LEFT|CHANNEL_SIDE_RIGHT|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 8, CL + CR + L + R + SL1 + SL2+ SR1 + SR2
- CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_CENTER|CHANNEL_BACK_RIGHT, ///< 8, CL + C+ CR + L + R + SL + S+ SR
-
- /* The following entries adds the LFE layouts, this way we can reuse the table for the AVCodec channel_layouts member*/
- CHANNEL_FRONT_CENTER|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_CENTER|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LOW_FREQUENCY,
- CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER|CHANNEL_LOW_FREQUENCY,
- CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_BACK_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY,
- CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY,
- CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_SIDE_LEFT|CHANNEL_SIDE_RIGHT|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY,
- CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_CENTER|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY,
- 0,
+ CH_FRONT_CENTER, ///< 1, A
+ CH_LAYOUT_STEREO, ///< 2, A + B (dual mono)
+ CH_LAYOUT_STEREO, ///< 2, L + R (stereo)
+ CH_LAYOUT_STEREO, ///< 2, (L+R) + (L-R) (sum-difference)
+ CH_LAYOUT_STEREO, ///< 2, LT +RT (left and right total)
+ CH_LAYOUT_STEREO|CH_FRONT_CENTER, ///< 3, C+L+R
+ CH_LAYOUT_STEREO|CH_BACK_CENTER, ///< 3, L+R+S
+ CH_LAYOUT_STEREO|CH_FRONT_CENTER|CH_BACK_CENTER, ///< 4, C + L + R+ S
+ CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT, ///< 4, L + R +SL+ SR
+ CH_LAYOUT_STEREO|CH_FRONT_CENTER|CH_SIDE_LEFT|CH_SIDE_RIGHT, ///< 5, C + L + R+ SL+SR
+ CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT|CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER, ///< 6, CL + CR + L + R + SL + SR
+ CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT|CH_FRONT_CENTER|CH_BACK_CENTER, ///< 6, C + L + R+ LR + RR + OV
+ CH_FRONT_CENTER|CH_FRONT_RIGHT_OF_CENTER|CH_FRONT_LEFT_OF_CENTER|CH_BACK_CENTER|CH_BACK_LEFT|CH_BACK_RIGHT, ///< 6, CF+ CR+LF+ RF+LR + RR
+ CH_FRONT_LEFT_OF_CENTER|CH_FRONT_CENTER|CH_FRONT_RIGHT_OF_CENTER|CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT, ///< 7, CL + C + CR + L + R + SL + SR
+ CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER|CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT|CH_BACK_LEFT|CH_BACK_RIGHT, ///< 8, CL + CR + L + R + SL1 + SL2+ SR1 + SR2
+ CH_FRONT_LEFT_OF_CENTER|CH_FRONT_CENTER|CH_FRONT_RIGHT_OF_CENTER|CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_BACK_CENTER|CH_SIDE_RIGHT, ///< 8, CL + C+ CR + L + R + SL + S+ SR
+};
+
+static const int8_t dca_lfe_index[] = {
+ 1,2,2,2,2,3,2,3,2,3,2,3,1,3,2,3
+};
+
+static const int8_t dca_channel_reorder_lfe[][8] = {
+ { 0, -1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 2, 0, 1, -1, -1, -1, -1, -1},
+ { 0, 1, 3, -1, -1, -1, -1, -1},
+ { 2, 0, 1, 4, -1, -1, -1, -1},
+ { 0, 1, 3, 4, -1, -1, -1, -1},
+ { 2, 0, 1, 4, 5, -1, -1, -1},
+ { 3, 4, 0, 1, 5, 6, -1, -1},
+ { 2, 0, 1, 4, 5, 6, -1, -1},
+ { 0, 6, 4, 5, 2, 3, -1, -1},
+ { 4, 2, 5, 0, 1, 6, 7, -1},
+ { 5, 6, 0, 1, 7, 3, 8, 4},
+ { 4, 2, 5, 0, 1, 6, 8, 7},
+};
+
+static const int8_t dca_channel_reorder_nolfe[][8] = {
+ { 0, -1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 0, 1, -1, -1, -1, -1, -1, -1},
+ { 2, 0, 1, -1, -1, -1, -1, -1},
+ { 0, 1, 2, -1, -1, -1, -1, -1},
+ { 2, 0, 1, 3, -1, -1, -1, -1},
+ { 0, 1, 2, 3, -1, -1, -1, -1},
+ { 2, 0, 1, 3, 4, -1, -1, -1},
+ { 2, 3, 0, 1, 4, 5, -1, -1},
+ { 2, 0, 1, 3, 4, 5, -1, -1},
+ { 0, 5, 3, 4, 1, 2, -1, -1},
+ { 3, 2, 4, 0, 1, 5, 6, -1},
+ { 4, 5, 0, 1, 6, 2, 7, 3},
+ { 3, 2, 4, 0, 1, 5, 7, 6},
};
uint8_t dca_buffer[DCA_MAX_FRAME_SIZE];
int dca_buffer_size; ///< how much data is in the dca_buffer
+ const int8_t* channel_order_tab; ///< channel reordering table, lfe and non lfe
GetBitContext gb;
/* Current position in DCA frame */
int current_subframe;
for (k = 0; k < s->prim_channels; k++) {
/* static float pcm_to_double[8] =
{32768.0, 32768.0, 524288.0, 524288.0, 0, 8388608.0, 8388608.0};*/
- qmf_32_subbands(s, k, subband_samples[k], &s->samples[256 * k],
+ qmf_32_subbands(s, k, subband_samples[k], &s->samples[256 * s->channel_order_tab[k]],
M_SQRT1_2*s->scale_bias /*pcm_to_double[s->source_pcm_res] */ ,
s->add_bias );
}
/* Generate LFE samples for this subsubframe FIXME!!! */
if (s->output & DCA_LFE) {
int lfe_samples = 2 * s->lfe * s->subsubframes;
- int i_channels = dca_channels[s->output & DCA_CHANNEL_MASK];
lfe_interpolation_fir(s->lfe, 2 * s->lfe,
s->lfe_data + lfe_samples +
2 * s->lfe * subsubframe,
- &s->samples[256 * i_channels],
+ &s->samples[256 * dca_lfe_index[s->amode]],
(1.0/256.0)*s->scale_bias, s->add_bias);
/* Outputs 20bits pcm samples */
}
PutBitContext pb;
if((unsigned)src_size > (unsigned)max_size) {
- av_log(NULL, AV_LOG_ERROR, "Input frame size larger then DCA_MAX_FRAME_SIZE!\n");
- return -1;
+// av_log(NULL, AV_LOG_ERROR, "Input frame size larger then DCA_MAX_FRAME_SIZE!\n");
+// return -1;
+ src_size = max_size;
}
mrk = AV_RB32(src);
avctx->bit_rate = s->bit_rate;
channels = s->prim_channels + !!s->lfe;
- if(avctx->request_channels == 2 && s->prim_channels > 2) {
- channels = 2;
- s->output = DCA_STEREO;
- avctx->channel_layout = CHANNEL_LAYOUT_STEREO;
- }
- if (s->amode<16)
+
+ if (s->amode<16) {
avctx->channel_layout = dca_core_channel_layout[s->amode];
- if (s->lfe) avctx->channel_layout |= CHANNEL_LOW_FREQUENCY;
+ if (s->lfe) {
+ avctx->channel_layout |= CH_LOW_FREQUENCY;
+ s->channel_order_tab = dca_channel_reorder_lfe[s->amode];
+ } else
+ s->channel_order_tab = dca_channel_reorder_nolfe[s->amode];
+
+ if(avctx->request_channels == 2 && s->prim_channels > 2) {
+ channels = 2;
+ s->output = DCA_STEREO;
+ avctx->channel_layout = CH_LAYOUT_STEREO;
+ }
+ } else {
+ av_log(avctx, AV_LOG_ERROR, "Non standard configuration %d !\n",s->amode);
+ return -1;
+ }
+
/* There is nothing that prevents a dts frame to change channel configuration
but FFmpeg doesn't support that so only set the channels if it is previously
.decode = dca_decode_frame,
.close = dca_decode_end,
.long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"),
- .channel_layouts = dca_core_channel_layout,
};
projects / ffmpeg / blobdiff