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Diffstat (limited to 'ffmpeg1/libavresample/audio_mix.c')
-rw-r--r--ffmpeg1/libavresample/audio_mix.c739
1 files changed, 739 insertions, 0 deletions
diff --git a/ffmpeg1/libavresample/audio_mix.c b/ffmpeg1/libavresample/audio_mix.c
new file mode 100644
index 0000000..b69bfbc
--- /dev/null
+++ b/ffmpeg1/libavresample/audio_mix.c
@@ -0,0 +1,739 @@
+/*
+ * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "libavutil/common.h"
+#include "libavutil/libm.h"
+#include "libavutil/samplefmt.h"
+#include "avresample.h"
+#include "internal.h"
+#include "audio_data.h"
+#include "audio_mix.h"
+
+static const char *coeff_type_names[] = { "q8", "q15", "flt" };
+
+struct AudioMix {
+ AVAudioResampleContext *avr;
+ enum AVSampleFormat fmt;
+ enum AVMixCoeffType coeff_type;
+ uint64_t in_layout;
+ uint64_t out_layout;
+ int in_channels;
+ int out_channels;
+
+ int ptr_align;
+ int samples_align;
+ int has_optimized_func;
+ const char *func_descr;
+ const char *func_descr_generic;
+ mix_func *mix;
+ mix_func *mix_generic;
+
+ int in_matrix_channels;
+ int out_matrix_channels;
+ int output_zero[AVRESAMPLE_MAX_CHANNELS];
+ int input_skip[AVRESAMPLE_MAX_CHANNELS];
+ int output_skip[AVRESAMPLE_MAX_CHANNELS];
+ int16_t *matrix_q8[AVRESAMPLE_MAX_CHANNELS];
+ int32_t *matrix_q15[AVRESAMPLE_MAX_CHANNELS];
+ float *matrix_flt[AVRESAMPLE_MAX_CHANNELS];
+ void **matrix;
+};
+
+void ff_audio_mix_set_func(AudioMix *am, enum AVSampleFormat fmt,
+ enum AVMixCoeffType coeff_type, int in_channels,
+ int out_channels, int ptr_align, int samples_align,
+ const char *descr, void *mix_func)
+{
+ if (fmt == am->fmt && coeff_type == am->coeff_type &&
+ ( in_channels == am->in_matrix_channels || in_channels == 0) &&
+ (out_channels == am->out_matrix_channels || out_channels == 0)) {
+ char chan_str[16];
+ am->mix = mix_func;
+ am->func_descr = descr;
+ am->ptr_align = ptr_align;
+ am->samples_align = samples_align;
+ if (ptr_align == 1 && samples_align == 1) {
+ am->mix_generic = mix_func;
+ am->func_descr_generic = descr;
+ } else {
+ am->has_optimized_func = 1;
+ }
+ if (in_channels) {
+ if (out_channels)
+ snprintf(chan_str, sizeof(chan_str), "[%d to %d] ",
+ in_channels, out_channels);
+ else
+ snprintf(chan_str, sizeof(chan_str), "[%d to any] ",
+ in_channels);
+ } else if (out_channels) {
+ snprintf(chan_str, sizeof(chan_str), "[any to %d] ",
+ out_channels);
+ } else {
+ snprintf(chan_str, sizeof(chan_str), "[any to any] ");
+ }
+ av_log(am->avr, AV_LOG_DEBUG, "audio_mix: found function: [fmt=%s] "
+ "[c=%s] %s(%s)\n", av_get_sample_fmt_name(fmt),
+ coeff_type_names[coeff_type], chan_str, descr);
+ }
+}
+
+#define MIX_FUNC_NAME(fmt, cfmt) mix_any_ ## fmt ##_## cfmt ##_c
+
+#define MIX_FUNC_GENERIC(fmt, cfmt, stype, ctype, sumtype, expr) \
+static void MIX_FUNC_NAME(fmt, cfmt)(stype **samples, ctype **matrix, \
+ int len, int out_ch, int in_ch) \
+{ \
+ int i, in, out; \
+ stype temp[AVRESAMPLE_MAX_CHANNELS]; \
+ for (i = 0; i < len; i++) { \
+ for (out = 0; out < out_ch; out++) { \
+ sumtype sum = 0; \
+ for (in = 0; in < in_ch; in++) \
+ sum += samples[in][i] * matrix[out][in]; \
+ temp[out] = expr; \
+ } \
+ for (out = 0; out < out_ch; out++) \
+ samples[out][i] = temp[out]; \
+ } \
+}
+
+MIX_FUNC_GENERIC(FLTP, FLT, float, float, float, sum)
+MIX_FUNC_GENERIC(S16P, FLT, int16_t, float, float, av_clip_int16(lrintf(sum)))
+MIX_FUNC_GENERIC(S16P, Q15, int16_t, int32_t, int64_t, av_clip_int16(sum >> 15))
+MIX_FUNC_GENERIC(S16P, Q8, int16_t, int16_t, int32_t, av_clip_int16(sum >> 8))
+
+/* TODO: templatize the channel-specific C functions */
+
+static void mix_2_to_1_fltp_flt_c(float **samples, float **matrix, int len,
+ int out_ch, int in_ch)
+{
+ float *src0 = samples[0];
+ float *src1 = samples[1];
+ float *dst = src0;
+ float m0 = matrix[0][0];
+ float m1 = matrix[0][1];
+
+ while (len > 4) {
+ *dst++ = *src0++ * m0 + *src1++ * m1;
+ *dst++ = *src0++ * m0 + *src1++ * m1;
+ *dst++ = *src0++ * m0 + *src1++ * m1;
+ *dst++ = *src0++ * m0 + *src1++ * m1;
+ len -= 4;
+ }
+ while (len > 0) {
+ *dst++ = *src0++ * m0 + *src1++ * m1;
+ len--;
+ }
+}
+
+static void mix_2_to_1_s16p_flt_c(int16_t **samples, float **matrix, int len,
+ int out_ch, int in_ch)
+{
+ int16_t *src0 = samples[0];
+ int16_t *src1 = samples[1];
+ int16_t *dst = src0;
+ float m0 = matrix[0][0];
+ float m1 = matrix[0][1];
+
+ while (len > 4) {
+ *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
+ *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
+ *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
+ *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
+ len -= 4;
+ }
+ while (len > 0) {
+ *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
+ len--;
+ }
+}
+
+static void mix_2_to_1_s16p_q8_c(int16_t **samples, int16_t **matrix, int len,
+ int out_ch, int in_ch)
+{
+ int16_t *src0 = samples[0];
+ int16_t *src1 = samples[1];
+ int16_t *dst = src0;
+ int16_t m0 = matrix[0][0];
+ int16_t m1 = matrix[0][1];
+
+ while (len > 4) {
+ *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
+ *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
+ *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
+ *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
+ len -= 4;
+ }
+ while (len > 0) {
+ *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
+ len--;
+ }
+}
+
+static void mix_1_to_2_fltp_flt_c(float **samples, float **matrix, int len,
+ int out_ch, int in_ch)
+{
+ float v;
+ float *dst0 = samples[0];
+ float *dst1 = samples[1];
+ float *src = dst0;
+ float m0 = matrix[0][0];
+ float m1 = matrix[1][0];
+
+ while (len > 4) {
+ v = *src++;
+ *dst0++ = v * m1;
+ *dst1++ = v * m0;
+ v = *src++;
+ *dst0++ = v * m1;
+ *dst1++ = v * m0;
+ v = *src++;
+ *dst0++ = v * m1;
+ *dst1++ = v * m0;
+ v = *src++;
+ *dst0++ = v * m1;
+ *dst1++ = v * m0;
+ len -= 4;
+ }
+ while (len > 0) {
+ v = *src++;
+ *dst0++ = v * m1;
+ *dst1++ = v * m0;
+ len--;
+ }
+}
+
+static void mix_6_to_2_fltp_flt_c(float **samples, float **matrix, int len,
+ int out_ch, int in_ch)
+{
+ float v0, v1;
+ float *src0 = samples[0];
+ float *src1 = samples[1];
+ float *src2 = samples[2];
+ float *src3 = samples[3];
+ float *src4 = samples[4];
+ float *src5 = samples[5];
+ float *dst0 = src0;
+ float *dst1 = src1;
+ float *m0 = matrix[0];
+ float *m1 = matrix[1];
+
+ while (len > 0) {
+ v0 = *src0++;
+ v1 = *src1++;
+ *dst0++ = v0 * m0[0] +
+ v1 * m0[1] +
+ *src2 * m0[2] +
+ *src3 * m0[3] +
+ *src4 * m0[4] +
+ *src5 * m0[5];
+ *dst1++ = v0 * m1[0] +
+ v1 * m1[1] +
+ *src2++ * m1[2] +
+ *src3++ * m1[3] +
+ *src4++ * m1[4] +
+ *src5++ * m1[5];
+ len--;
+ }
+}
+
+static void mix_2_to_6_fltp_flt_c(float **samples, float **matrix, int len,
+ int out_ch, int in_ch)
+{
+ float v0, v1;
+ float *dst0 = samples[0];
+ float *dst1 = samples[1];
+ float *dst2 = samples[2];
+ float *dst3 = samples[3];
+ float *dst4 = samples[4];
+ float *dst5 = samples[5];
+ float *src0 = dst0;
+ float *src1 = dst1;
+
+ while (len > 0) {
+ v0 = *src0++;
+ v1 = *src1++;
+ *dst0++ = v0 * matrix[0][0] + v1 * matrix[0][1];
+ *dst1++ = v0 * matrix[1][0] + v1 * matrix[1][1];
+ *dst2++ = v0 * matrix[2][0] + v1 * matrix[2][1];
+ *dst3++ = v0 * matrix[3][0] + v1 * matrix[3][1];
+ *dst4++ = v0 * matrix[4][0] + v1 * matrix[4][1];
+ *dst5++ = v0 * matrix[5][0] + v1 * matrix[5][1];
+ len--;
+ }
+}
+
+static int mix_function_init(AudioMix *am)
+{
+ am->func_descr = am->func_descr_generic = "n/a";
+ am->mix = am->mix_generic = NULL;
+
+ /* no need to set a mix function when we're skipping mixing */
+ if (!am->in_matrix_channels || !am->out_matrix_channels)
+ return 0;
+
+ /* any-to-any C versions */
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
+ 0, 0, 1, 1, "C", MIX_FUNC_NAME(FLTP, FLT));
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_FLT,
+ 0, 0, 1, 1, "C", MIX_FUNC_NAME(S16P, FLT));
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_Q15,
+ 0, 0, 1, 1, "C", MIX_FUNC_NAME(S16P, Q15));
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_Q8,
+ 0, 0, 1, 1, "C", MIX_FUNC_NAME(S16P, Q8));
+
+ /* channel-specific C versions */
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
+ 2, 1, 1, 1, "C", mix_2_to_1_fltp_flt_c);
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_FLT,
+ 2, 1, 1, 1, "C", mix_2_to_1_s16p_flt_c);
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_Q8,
+ 2, 1, 1, 1, "C", mix_2_to_1_s16p_q8_c);
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
+ 1, 2, 1, 1, "C", mix_1_to_2_fltp_flt_c);
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
+ 6, 2, 1, 1, "C", mix_6_to_2_fltp_flt_c);
+
+ ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
+ 2, 6, 1, 1, "C", mix_2_to_6_fltp_flt_c);
+
+ if (ARCH_X86)
+ ff_audio_mix_init_x86(am);
+
+ if (!am->mix) {
+ av_log(am->avr, AV_LOG_ERROR, "audio_mix: NO FUNCTION FOUND: [fmt=%s] "
+ "[c=%s] [%d to %d]\n", av_get_sample_fmt_name(am->fmt),
+ coeff_type_names[am->coeff_type], am->in_channels,
+ am->out_channels);
+ return AVERROR_PATCHWELCOME;
+ }
+ return 0;
+}
+
+AudioMix *ff_audio_mix_alloc(AVAudioResampleContext *avr)
+{
+ AudioMix *am;
+ int ret;
+
+ am = av_mallocz(sizeof(*am));
+ if (!am)
+ return NULL;
+ am->avr = avr;
+
+ if (avr->internal_sample_fmt != AV_SAMPLE_FMT_S16P &&
+ avr->internal_sample_fmt != AV_SAMPLE_FMT_FLTP) {
+ av_log(avr, AV_LOG_ERROR, "Unsupported internal format for "
+ "mixing: %s\n",
+ av_get_sample_fmt_name(avr->internal_sample_fmt));
+ goto error;
+ }
+
+ am->fmt = avr->internal_sample_fmt;
+ am->coeff_type = avr->mix_coeff_type;
+ am->in_layout = avr->in_channel_layout;
+ am->out_layout = avr->out_channel_layout;
+ am->in_channels = avr->in_channels;
+ am->out_channels = avr->out_channels;
+
+ /* build matrix if the user did not already set one */
+ if (avr->mix_matrix) {
+ ret = ff_audio_mix_set_matrix(am, avr->mix_matrix, avr->in_channels);
+ if (ret < 0)
+ goto error;
+ av_freep(&avr->mix_matrix);
+ } else {
+ double *matrix_dbl = av_mallocz(avr->out_channels * avr->in_channels *
+ sizeof(*matrix_dbl));
+ if (!matrix_dbl)
+ goto error;
+
+ ret = avresample_build_matrix(avr->in_channel_layout,
+ avr->out_channel_layout,
+ avr->center_mix_level,
+ avr->surround_mix_level,
+ avr->lfe_mix_level,
+ avr->normalize_mix_level,
+ matrix_dbl,
+ avr->in_channels,
+ avr->matrix_encoding);
+ if (ret < 0) {
+ av_free(matrix_dbl);
+ goto error;
+ }
+
+ ret = ff_audio_mix_set_matrix(am, matrix_dbl, avr->in_channels);
+ if (ret < 0) {
+ av_log(avr, AV_LOG_ERROR, "error setting mix matrix\n");
+ av_free(matrix_dbl);
+ goto error;
+ }
+
+ av_free(matrix_dbl);
+ }
+
+ return am;
+
+error:
+ av_free(am);
+ return NULL;
+}
+
+void ff_audio_mix_free(AudioMix **am_p)
+{
+ AudioMix *am;
+
+ if (!*am_p)
+ return;
+ am = *am_p;
+
+ if (am->matrix) {
+ av_free(am->matrix[0]);
+ am->matrix = NULL;
+ }
+ memset(am->matrix_q8, 0, sizeof(am->matrix_q8 ));
+ memset(am->matrix_q15, 0, sizeof(am->matrix_q15));
+ memset(am->matrix_flt, 0, sizeof(am->matrix_flt));
+
+ av_freep(am_p);
+}
+
+int ff_audio_mix(AudioMix *am, AudioData *src)
+{
+ int use_generic = 1;
+ int len = src->nb_samples;
+ int i, j;
+
+ /* determine whether to use the optimized function based on pointer and
+ samples alignment in both the input and output */
+ if (am->has_optimized_func) {
+ int aligned_len = FFALIGN(len, am->samples_align);
+ if (!(src->ptr_align % am->ptr_align) &&
+ src->samples_align >= aligned_len) {
+ len = aligned_len;
+ use_generic = 0;
+ }
+ }
+ av_dlog(am->avr, "audio_mix: %d samples - %d to %d channels (%s)\n",
+ src->nb_samples, am->in_channels, am->out_channels,
+ use_generic ? am->func_descr_generic : am->func_descr);
+
+ if (am->in_matrix_channels && am->out_matrix_channels) {
+ uint8_t **data;
+ uint8_t *data0[AVRESAMPLE_MAX_CHANNELS];
+
+ if (am->out_matrix_channels < am->out_channels ||
+ am->in_matrix_channels < am->in_channels) {
+ for (i = 0, j = 0; i < FFMAX(am->in_channels, am->out_channels); i++) {
+ if (am->input_skip[i] || am->output_skip[i] || am->output_zero[i])
+ continue;
+ data0[j++] = src->data[i];
+ }
+ data = data0;
+ } else {
+ data = src->data;
+ }
+
+ if (use_generic)
+ am->mix_generic(data, am->matrix, len, am->out_matrix_channels,
+ am->in_matrix_channels);
+ else
+ am->mix(data, am->matrix, len, am->out_matrix_channels,
+ am->in_matrix_channels);
+ }
+
+ if (am->out_matrix_channels < am->out_channels) {
+ for (i = 0; i < am->out_channels; i++)
+ if (am->output_zero[i])
+ av_samples_set_silence(&src->data[i], 0, len, 1, am->fmt);
+ }
+
+ ff_audio_data_set_channels(src, am->out_channels);
+
+ return 0;
+}
+
+int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride)
+{
+ int i, o, i0, o0;
+
+ if ( am->in_channels <= 0 || am->in_channels > AVRESAMPLE_MAX_CHANNELS ||
+ am->out_channels <= 0 || am->out_channels > AVRESAMPLE_MAX_CHANNELS) {
+ av_log(am->avr, AV_LOG_ERROR, "Invalid channel counts\n");
+ return AVERROR(EINVAL);
+ }
+
+#define GET_MATRIX_CONVERT(suffix, scale) \
+ if (!am->matrix_ ## suffix[0]) { \
+ av_log(am->avr, AV_LOG_ERROR, "matrix is not set\n"); \
+ return AVERROR(EINVAL); \
+ } \
+ for (o = 0, o0 = 0; o < am->out_channels; o++) { \
+ for (i = 0, i0 = 0; i < am->in_channels; i++) { \
+ if (am->input_skip[i] || am->output_zero[o]) \
+ matrix[o * stride + i] = 0.0; \
+ else \
+ matrix[o * stride + i] = am->matrix_ ## suffix[o0][i0] * \
+ (scale); \
+ if (!am->input_skip[i]) \
+ i0++; \
+ } \
+ if (!am->output_zero[o]) \
+ o0++; \
+ }
+
+ switch (am->coeff_type) {
+ case AV_MIX_COEFF_TYPE_Q8:
+ GET_MATRIX_CONVERT(q8, 1.0 / 256.0);
+ break;
+ case AV_MIX_COEFF_TYPE_Q15:
+ GET_MATRIX_CONVERT(q15, 1.0 / 32768.0);
+ break;
+ case AV_MIX_COEFF_TYPE_FLT:
+ GET_MATRIX_CONVERT(flt, 1.0);
+ break;
+ default:
+ av_log(am->avr, AV_LOG_ERROR, "Invalid mix coeff type\n");
+ return AVERROR(EINVAL);
+ }
+
+ return 0;
+}
+
+static void reduce_matrix(AudioMix *am, const double *matrix, int stride)
+{
+ int i, o;
+
+ memset(am->output_zero, 0, sizeof(am->output_zero));
+ memset(am->input_skip, 0, sizeof(am->input_skip));
+ memset(am->output_skip, 0, sizeof(am->output_skip));
+
+ /* exclude output channels if they can be zeroed instead of mixed */
+ for (o = 0; o < am->out_channels; o++) {
+ int zero = 1;
+
+ /* check if the output is always silent */
+ for (i = 0; i < am->in_channels; i++) {
+ if (matrix[o * stride + i] != 0.0) {
+ zero = 0;
+ break;
+ }
+ }
+ /* check if the corresponding input channel makes a contribution to
+ any output channel */
+ if (o < am->in_channels) {
+ for (i = 0; i < am->out_channels; i++) {
+ if (matrix[i * stride + o] != 0.0) {
+ zero = 0;
+ break;
+ }
+ }
+ }
+ if (zero) {
+ am->output_zero[o] = 1;
+ am->out_matrix_channels--;
+ }
+ }
+ if (am->out_matrix_channels == 0) {
+ am->in_matrix_channels = 0;
+ return;
+ }
+
+ /* skip input channels that contribute fully only to the corresponding
+ output channel */
+ for (i = 0; i < FFMIN(am->in_channels, am->out_channels); i++) {
+ int skip = 1;
+
+ for (o = 0; o < am->out_channels; o++) {
+ int i0;
+ if ((o != i && matrix[o * stride + i] != 0.0) ||
+ (o == i && matrix[o * stride + i] != 1.0)) {
+ skip = 0;
+ break;
+ }
+ /* if the input contributes fully to the output, also check that no
+ other inputs contribute to this output */
+ if (o == i) {
+ for (i0 = 0; i0 < am->in_channels; i0++) {
+ if (i0 != i && matrix[o * stride + i0] != 0.0) {
+ skip = 0;
+ break;
+ }
+ }
+ }
+ }
+ if (skip) {
+ am->input_skip[i] = 1;
+ am->in_matrix_channels--;
+ }
+ }
+ /* skip input channels that do not contribute to any output channel */
+ for (; i < am->in_channels; i++) {
+ int contrib = 0;
+
+ for (o = 0; o < am->out_channels; o++) {
+ if (matrix[o * stride + i] != 0.0) {
+ contrib = 1;
+ break;
+ }
+ }
+ if (!contrib) {
+ am->input_skip[i] = 1;
+ am->in_matrix_channels--;
+ }
+ }
+ if (am->in_matrix_channels == 0) {
+ am->out_matrix_channels = 0;
+ return;
+ }
+
+ /* skip output channels that only get full contribution from the
+ corresponding input channel */
+ for (o = 0; o < FFMIN(am->in_channels, am->out_channels); o++) {
+ int skip = 1;
+ int o0;
+
+ for (i = 0; i < am->in_channels; i++) {
+ if ((o != i && matrix[o * stride + i] != 0.0) ||
+ (o == i && matrix[o * stride + i] != 1.0)) {
+ skip = 0;
+ break;
+ }
+ }
+ /* check if the corresponding input channel makes a contribution to
+ any other output channel */
+ i = o;
+ for (o0 = 0; o0 < am->out_channels; o0++) {
+ if (o0 != i && matrix[o0 * stride + i] != 0.0) {
+ skip = 0;
+ break;
+ }
+ }
+ if (skip) {
+ am->output_skip[o] = 1;
+ am->out_matrix_channels--;
+ }
+ }
+ if (am->out_matrix_channels == 0) {
+ am->in_matrix_channels = 0;
+ return;
+ }
+}
+
+int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride)
+{
+ int i, o, i0, o0, ret;
+ char in_layout_name[128];
+ char out_layout_name[128];
+
+ if ( am->in_channels <= 0 || am->in_channels > AVRESAMPLE_MAX_CHANNELS ||
+ am->out_channels <= 0 || am->out_channels > AVRESAMPLE_MAX_CHANNELS) {
+ av_log(am->avr, AV_LOG_ERROR, "Invalid channel counts\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (am->matrix) {
+ av_free(am->matrix[0]);
+ am->matrix = NULL;
+ }
+
+ am->in_matrix_channels = am->in_channels;
+ am->out_matrix_channels = am->out_channels;
+
+ reduce_matrix(am, matrix, stride);
+
+#define CONVERT_MATRIX(type, expr) \
+ am->matrix_## type[0] = av_mallocz(am->out_matrix_channels * \
+ am->in_matrix_channels * \
+ sizeof(*am->matrix_## type[0])); \
+ if (!am->matrix_## type[0]) \
+ return AVERROR(ENOMEM); \
+ for (o = 0, o0 = 0; o < am->out_channels; o++) { \
+ if (am->output_zero[o] || am->output_skip[o]) \
+ continue; \
+ if (o0 > 0) \
+ am->matrix_## type[o0] = am->matrix_## type[o0 - 1] + \
+ am->in_matrix_channels; \
+ for (i = 0, i0 = 0; i < am->in_channels; i++) { \
+ double v; \
+ if (am->input_skip[i]) \
+ continue; \
+ v = matrix[o * stride + i]; \
+ am->matrix_## type[o0][i0] = expr; \
+ i0++; \
+ } \
+ o0++; \
+ } \
+ am->matrix = (void **)am->matrix_## type;
+
+ if (am->in_matrix_channels && am->out_matrix_channels) {
+ switch (am->coeff_type) {
+ case AV_MIX_COEFF_TYPE_Q8:
+ CONVERT_MATRIX(q8, av_clip_int16(lrint(256.0 * v)))
+ break;
+ case AV_MIX_COEFF_TYPE_Q15:
+ CONVERT_MATRIX(q15, av_clipl_int32(llrint(32768.0 * v)))
+ break;
+ case AV_MIX_COEFF_TYPE_FLT:
+ CONVERT_MATRIX(flt, v)
+ break;
+ default:
+ av_log(am->avr, AV_LOG_ERROR, "Invalid mix coeff type\n");
+ return AVERROR(EINVAL);
+ }
+ }
+
+ ret = mix_function_init(am);
+ if (ret < 0)
+ return ret;
+
+ av_get_channel_layout_string(in_layout_name, sizeof(in_layout_name),
+ am->in_channels, am->in_layout);
+ av_get_channel_layout_string(out_layout_name, sizeof(out_layout_name),
+ am->out_channels, am->out_layout);
+ av_log(am->avr, AV_LOG_DEBUG, "audio_mix: %s to %s\n",
+ in_layout_name, out_layout_name);
+ av_log(am->avr, AV_LOG_DEBUG, "matrix size: %d x %d\n",
+ am->in_matrix_channels, am->out_matrix_channels);
+ for (o = 0; o < am->out_channels; o++) {
+ for (i = 0; i < am->in_channels; i++) {
+ if (am->output_zero[o])
+ av_log(am->avr, AV_LOG_DEBUG, " (ZERO)");
+ else if (am->input_skip[i] || am->output_skip[o])
+ av_log(am->avr, AV_LOG_DEBUG, " (SKIP)");
+ else
+ av_log(am->avr, AV_LOG_DEBUG, " %0.3f ",
+ matrix[o * am->in_channels + i]);
+ }
+ av_log(am->avr, AV_LOG_DEBUG, "\n");
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 19:35:32 +0000