| /* |
| * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; 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 * const 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 * m0; |
| *dst1++ = v * m1; |
| v = *src++; |
| *dst0++ = v * m0; |
| *dst1++ = v * m1; |
| v = *src++; |
| *dst0++ = v * m0; |
| *dst1++ = v * m1; |
| v = *src++; |
| *dst0++ = v * m0; |
| *dst1++ = v * m1; |
| len -= 4; |
| } |
| while (len > 0) { |
| v = *src++; |
| *dst0++ = v * m0; |
| *dst1++ = v * m1; |
| 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 av_cold 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_log(am->avr, AV_LOG_TRACE, "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] = { NULL }; |
| |
| 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 (o < am->in_channels) |
| am->in_matrix_channels--; |
| } |
| } |
| if (am->out_matrix_channels == 0 || am->in_matrix_channels == 0) { |
| 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] || am->output_zero[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_zero[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; |
| } |
