#define SURROUND_DIRECT_LEFT 33
#define SURROUND_DIRECT_RIGHT 34
+#define SQRT3_2 1.22474487139158904909 /* sqrt(3/2) */
+
static av_always_inline int even(uint64_t layout)
{
return (!layout || (layout & (layout - 1)));
int avresample_build_matrix(uint64_t in_layout, uint64_t out_layout,
double center_mix_level, double surround_mix_level,
double lfe_mix_level, int normalize,
- double *matrix_out, int stride)
+ double *matrix_out, int stride,
+ enum AVMatrixEncoding matrix_encoding)
{
int i, j, out_i, out_j;
double matrix[64][64] = {{0}};
- int64_t unaccounted = in_layout & ~out_layout;
+ int64_t unaccounted;
double maxcoef = 0;
int in_channels, out_channels;
+ if ((out_layout & AV_CH_LAYOUT_STEREO_DOWNMIX) == AV_CH_LAYOUT_STEREO_DOWNMIX) {
+ out_layout = AV_CH_LAYOUT_STEREO;
+ }
+
+ unaccounted = in_layout & ~out_layout;
+
in_channels = av_get_channel_layout_nb_channels( in_layout);
out_channels = av_get_channel_layout_nb_channels(out_layout);
matrix[SIDE_LEFT ][BACK_CENTER] += M_SQRT1_2;
matrix[SIDE_RIGHT][BACK_CENTER] += M_SQRT1_2;
} else if (out_layout & AV_CH_FRONT_LEFT) {
- matrix[FRONT_LEFT ][BACK_CENTER] += surround_mix_level * M_SQRT1_2;
- matrix[FRONT_RIGHT][BACK_CENTER] += surround_mix_level * M_SQRT1_2;
+ if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY ||
+ matrix_encoding == AV_MATRIX_ENCODING_DPLII) {
+ if (unaccounted & (AV_CH_BACK_LEFT | AV_CH_SIDE_LEFT)) {
+ matrix[FRONT_LEFT ][BACK_CENTER] -= surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][BACK_CENTER] += surround_mix_level * M_SQRT1_2;
+ } else {
+ matrix[FRONT_LEFT ][BACK_CENTER] -= surround_mix_level;
+ matrix[FRONT_RIGHT][BACK_CENTER] += surround_mix_level;
+ }
+ } else {
+ matrix[FRONT_LEFT ][BACK_CENTER] += surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][BACK_CENTER] += surround_mix_level * M_SQRT1_2;
+ }
} else if (out_layout & AV_CH_FRONT_CENTER) {
matrix[FRONT_CENTER][BACK_CENTER] += surround_mix_level * M_SQRT1_2;
} else
matrix[SIDE_RIGHT][BACK_RIGHT] += 1.0;
}
} else if (out_layout & AV_CH_FRONT_LEFT) {
- matrix[FRONT_LEFT ][BACK_LEFT ] += surround_mix_level;
- matrix[FRONT_RIGHT][BACK_RIGHT] += surround_mix_level;
+ if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY) {
+ matrix[FRONT_LEFT ][BACK_LEFT ] -= surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_LEFT ][BACK_RIGHT] -= surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][BACK_LEFT ] += surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][BACK_RIGHT] += surround_mix_level * M_SQRT1_2;
+ } else if (matrix_encoding == AV_MATRIX_ENCODING_DPLII) {
+ matrix[FRONT_LEFT ][BACK_LEFT ] -= surround_mix_level * SQRT3_2;
+ matrix[FRONT_LEFT ][BACK_RIGHT] -= surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][BACK_LEFT ] += surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][BACK_RIGHT] += surround_mix_level * SQRT3_2;
+ } else {
+ matrix[FRONT_LEFT ][BACK_LEFT ] += surround_mix_level;
+ matrix[FRONT_RIGHT][BACK_RIGHT] += surround_mix_level;
+ }
} else if (out_layout & AV_CH_FRONT_CENTER) {
matrix[FRONT_CENTER][BACK_LEFT ] += surround_mix_level * M_SQRT1_2;
matrix[FRONT_CENTER][BACK_RIGHT] += surround_mix_level * M_SQRT1_2;
matrix[BACK_CENTER][SIDE_LEFT ] += M_SQRT1_2;
matrix[BACK_CENTER][SIDE_RIGHT] += M_SQRT1_2;
} else if (out_layout & AV_CH_FRONT_LEFT) {
- matrix[FRONT_LEFT ][SIDE_LEFT ] += surround_mix_level;
- matrix[FRONT_RIGHT][SIDE_RIGHT] += surround_mix_level;
+ if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY) {
+ matrix[FRONT_LEFT ][SIDE_LEFT ] -= surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_LEFT ][SIDE_RIGHT] -= surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][SIDE_LEFT ] += surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][SIDE_RIGHT] += surround_mix_level * M_SQRT1_2;
+ } else if (matrix_encoding == AV_MATRIX_ENCODING_DPLII) {
+ matrix[FRONT_LEFT ][SIDE_LEFT ] -= surround_mix_level * SQRT3_2;
+ matrix[FRONT_LEFT ][SIDE_RIGHT] -= surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][SIDE_LEFT ] += surround_mix_level * M_SQRT1_2;
+ matrix[FRONT_RIGHT][SIDE_RIGHT] += surround_mix_level * SQRT3_2;
+ } else {
+ matrix[FRONT_LEFT ][SIDE_LEFT ] += surround_mix_level;
+ matrix[FRONT_RIGHT][SIDE_RIGHT] += surround_mix_level;
+ }
} else if (out_layout & AV_CH_FRONT_CENTER) {
matrix[FRONT_CENTER][SIDE_LEFT ] += surround_mix_level * M_SQRT1_2;
matrix[FRONT_CENTER][SIDE_RIGHT] += surround_mix_level * M_SQRT1_2;
{ "phase_shift", "Resampling Phase Shift", OFFSET(phase_shift), AV_OPT_TYPE_INT, { 10 }, 0, 30, /* ??? */ PARAM },
{ "linear_interp", "Use Linear Interpolation", OFFSET(linear_interp), AV_OPT_TYPE_INT, { 0 }, 0, 1, PARAM },
{ "cutoff", "Cutoff Frequency Ratio", OFFSET(cutoff), AV_OPT_TYPE_DOUBLE, { 0.8 }, 0.0, 1.0, PARAM },
+ { "matrix_encoding", "Matrixed Stereo Encoding", OFFSET(matrix_encoding), AV_OPT_TYPE_INT, { AV_MATRIX_ENCODING_NONE}, AV_MATRIX_ENCODING_NONE, AV_MATRIX_ENCODING_NB-1, PARAM, "matrix_encoding" },
+ { "none", "None", 0, AV_OPT_TYPE_CONST, { AV_MATRIX_ENCODING_NONE }, INT_MIN, INT_MAX, PARAM, "matrix_encoding" },
+ { "dolby", "Dolby", 0, AV_OPT_TYPE_CONST, { AV_MATRIX_ENCODING_DOLBY }, INT_MIN, INT_MAX, PARAM, "matrix_encoding" },
+ { "dplii", "Dolby Pro Logic II", 0, AV_OPT_TYPE_CONST, { AV_MATRIX_ENCODING_DPLII }, INT_MIN, INT_MAX, PARAM, "matrix_encoding" },
{ NULL },
};