コード例 #1
0
ファイル: af_channelsplit.c プロジェクト: 0day-ci/FFmpeg
static int query_formats(AVFilterContext *ctx)
{
    ChannelSplitContext *s = ctx->priv;
    AVFilterChannelLayouts *in_layouts = NULL;
    int i, ret;

    if ((ret = ff_set_common_formats(ctx, ff_planar_sample_fmts())) < 0 ||
        (ret = ff_set_common_samplerates(ctx, ff_all_samplerates())) < 0)
        return ret;

    if ((ret = ff_add_channel_layout(&in_layouts, s->channel_layout)) < 0 ||
        (ret = ff_channel_layouts_ref(in_layouts, &ctx->inputs[0]->out_channel_layouts)) < 0)
        return ret;

    for (i = 0; i < ctx->nb_outputs; i++) {
        AVFilterChannelLayouts *out_layouts = NULL;
        uint64_t channel = av_channel_layout_extract_channel(s->channel_layout, i);

        if ((ret = ff_add_channel_layout(&out_layouts, channel)) < 0 ||
            (ret = ff_channel_layouts_ref(out_layouts, &ctx->outputs[i]->in_channel_layouts)) < 0)
            return ret;
    }

    return 0;
}
コード例 #2
0
ファイル: af_channelsplit.c プロジェクト: 0day-ci/FFmpeg
static av_cold int init(AVFilterContext *ctx)
{
    ChannelSplitContext *s = ctx->priv;
    int nb_channels;
    int ret = 0, i;

    if (!(s->channel_layout = av_get_channel_layout(s->channel_layout_str))) {
        av_log(ctx, AV_LOG_ERROR, "Error parsing channel layout '%s'.\n",
               s->channel_layout_str);
        ret = AVERROR(EINVAL);
        goto fail;
    }

    nb_channels = av_get_channel_layout_nb_channels(s->channel_layout);
    for (i = 0; i < nb_channels; i++) {
        uint64_t channel = av_channel_layout_extract_channel(s->channel_layout, i);
        AVFilterPad pad  = { 0 };

        pad.type = AVMEDIA_TYPE_AUDIO;
        pad.name = av_get_channel_name(channel);

        ff_insert_outpad(ctx, i, &pad);
    }

fail:
    return ret;
}
コード例 #3
0
ファイル: af_channelsplit.c プロジェクト: 0day-ci/FFmpeg
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
    AVFilterContext *ctx = inlink->dst;
    int i, ret = 0;

    for (i = 0; i < ctx->nb_outputs; i++) {
        AVFrame *buf_out = av_frame_clone(buf);

        if (!buf_out) {
            ret = AVERROR(ENOMEM);
            break;
        }

        buf_out->data[0] = buf_out->extended_data[0] = buf_out->extended_data[i];
        buf_out->channel_layout =
            av_channel_layout_extract_channel(buf->channel_layout, i);
        av_frame_set_channels(buf_out, 1);

        ret = ff_filter_frame(ctx->outputs[i], buf_out);
        if (ret < 0)
            break;
    }
    av_frame_free(&buf);
    return ret;
}
コード例 #4
0
ファイル: avf_showvolume.c プロジェクト: singhpk89/FFmpeg
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
{
    AVFilterContext *ctx = inlink->dst;
    AVFilterLink *outlink = ctx->outputs[0];
    ShowVolumeContext *s = ctx->priv;
    int c, i, j, k;
    double values[VAR_VARS_NB];

    if (!s->out || s->out->width  != outlink->w ||
                   s->out->height != outlink->h) {
        av_frame_free(&s->out);
        s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
        if (!s->out) {
            av_frame_free(&insamples);
            return AVERROR(ENOMEM);
        }

        for (i = 0; i < outlink->h; i++)
            memset(s->out->data[0] + i * s->out->linesize[0], 0, outlink->w * 4);
    }
    s->out->pts = insamples->pts;

    for (j = 0; j < outlink->h; j++) {
        uint8_t *dst = s->out->data[0] + j * s->out->linesize[0];
        for (k = 0; k < s->w; k++) {
            dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] - s->f, 0);
            dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] - s->f, 0);
            dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] - s->f, 0);
            dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] - s->f, 0);
        }
    }

    for (c = 0; c < inlink->channels; c++) {
        float *src = (float *)insamples->extended_data[c];
        float max = 0;
        int color;

        for (i = 0; i < insamples->nb_samples; i++)
            max = FFMAX(max, src[i]);

        max = av_clipf(max, 0, 1);
        values[VAR_VOLUME] = 20.0 * log(max) / M_LN10;
        color = av_expr_eval(s->c_expr, values, NULL);

        for (j = 0; j < s->h; j++) {
            uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0];

            for (k = 0; k < s->w * max; k++)
                AV_WN32A(dst + k * 4, color);
        }

        if (s->h >= 8 && s->draw_text)
            drawtext(s->out, 2, c * (s->h + s->b) + (s->h - 8) / 2,
                     av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c)));
    }

    av_frame_free(&insamples);

    return ff_filter_frame(outlink, av_frame_clone(s->out));
}
コード例 #5
0
/**
 * \fn computeChannelLayout
 * @return 
 */
bool AUDMEncoder_Lavcodec::computeChannelLayout(void)
{
#define CHANMIX(x,y) case AV_CH_##y: *o=ADM_CH_##x;cprintf(" =>%s\n",ADM_printChannel(*o));o++;break;
    
        int channels=wavheader.channels;
        CHANNEL_TYPE *o=channelMapping;
        for(int i=0;i<channels;i++)
        {
          uint64_t chan=av_channel_layout_extract_channel(CONTEXT->channel_layout,i);
          cprintf("Channel %s ",av_get_channel_name(chan))  ;
          switch(chan)
          {
              CHANMIX(FRONT_LEFT,FRONT_LEFT)
              CHANMIX(FRONT_RIGHT,FRONT_RIGHT)
              CHANMIX(LFE,LOW_FREQUENCY)
              CHANMIX(FRONT_CENTER,FRONT_CENTER)
              CHANMIX(REAR_LEFT,BACK_LEFT)
              CHANMIX(REAR_RIGHT,BACK_RIGHT)
                default:
                    ADM_warning("Channel no mapped : %s\n");
                    *o++=ADM_CH_FRONT_LEFT;
                    break;
          }
        }
        return true;
}
コード例 #6
0
ファイル: util.cpp プロジェクト: mcanthony/libgroove
void from_ffmpeg_layout(uint64_t in_layout, SoundIoChannelLayout *out_layout) {
    int channel_count = av_get_channel_layout_nb_channels(in_layout);
    channel_count = min(channel_count, SOUNDIO_MAX_CHANNELS);

    out_layout->channel_count = channel_count;
    for (int i = 0; i < channel_count; i += 1) {
        uint64_t ffmpeg_channel_id = av_channel_layout_extract_channel(in_layout, i);
        enum SoundIoChannelId channel_id = from_ffmpeg_channel_id(ffmpeg_channel_id);
        out_layout->channels[i] = channel_id;
    }
    soundio_channel_layout_detect_builtin(out_layout);
}
コード例 #7
0
ファイル: rematrix.c プロジェクト: Emerica/FFmpeg
av_cold int swr_build_matrix(uint64_t in_ch_layout_param, uint64_t out_ch_layout_param,
                             double center_mix_level, double surround_mix_level,
                             double lfe_mix_level, double maxval,
                             double rematrix_volume, double *matrix_param,
                             int stride, enum AVMatrixEncoding matrix_encoding, void *log_context)
{
    int i, j, out_i;
    double matrix[NUM_NAMED_CHANNELS][NUM_NAMED_CHANNELS]={{0}};
    int64_t unaccounted, in_ch_layout, out_ch_layout;
    double maxcoef=0;
    char buf[128];

     in_ch_layout = clean_layout(log_context,  in_ch_layout_param);
    out_ch_layout = clean_layout(log_context, out_ch_layout_param);

    if(   out_ch_layout == AV_CH_LAYOUT_STEREO_DOWNMIX
       && (in_ch_layout & AV_CH_LAYOUT_STEREO_DOWNMIX) == 0
    )
        out_ch_layout = AV_CH_LAYOUT_STEREO;

    if(    in_ch_layout == AV_CH_LAYOUT_STEREO_DOWNMIX
       && (out_ch_layout & AV_CH_LAYOUT_STEREO_DOWNMIX) == 0
    )
        in_ch_layout = AV_CH_LAYOUT_STEREO;

    if(!sane_layout(in_ch_layout)){
        av_get_channel_layout_string(buf, sizeof(buf), -1, in_ch_layout_param);
        av_log(log_context, AV_LOG_ERROR, "Input channel layout '%s' is not supported\n", buf);
        return AVERROR(EINVAL);
    }

    if(!sane_layout(out_ch_layout)){
        av_get_channel_layout_string(buf, sizeof(buf), -1, out_ch_layout_param);
        av_log(log_context, AV_LOG_ERROR, "Output channel layout '%s' is not supported\n", buf);
        return AVERROR(EINVAL);
    }

    for(i=0; i<FF_ARRAY_ELEMS(matrix); i++){
        if(in_ch_layout & out_ch_layout & (1ULL<<i))
            matrix[i][i]= 1.0;
    }

    unaccounted= in_ch_layout & ~out_ch_layout;

//FIXME implement dolby surround
//FIXME implement full ac3


    if(unaccounted & AV_CH_FRONT_CENTER){
        if((out_ch_layout & AV_CH_LAYOUT_STEREO) == AV_CH_LAYOUT_STEREO){
            if(in_ch_layout & AV_CH_LAYOUT_STEREO) {
                matrix[ FRONT_LEFT][FRONT_CENTER]+= center_mix_level;
                matrix[FRONT_RIGHT][FRONT_CENTER]+= center_mix_level;
            } else {
                matrix[ FRONT_LEFT][FRONT_CENTER]+= M_SQRT1_2;
                matrix[FRONT_RIGHT][FRONT_CENTER]+= M_SQRT1_2;
            }
        }else
            av_assert0(0);
    }
    if(unaccounted & AV_CH_LAYOUT_STEREO){
        if(out_ch_layout & AV_CH_FRONT_CENTER){
            matrix[FRONT_CENTER][ FRONT_LEFT]+= M_SQRT1_2;
            matrix[FRONT_CENTER][FRONT_RIGHT]+= M_SQRT1_2;
            if(in_ch_layout & AV_CH_FRONT_CENTER)
                matrix[FRONT_CENTER][ FRONT_CENTER] = center_mix_level*sqrt(2);
        }else
            av_assert0(0);
    }

    if(unaccounted & AV_CH_BACK_CENTER){
        if(out_ch_layout & AV_CH_BACK_LEFT){
            matrix[ BACK_LEFT][BACK_CENTER]+= M_SQRT1_2;
            matrix[BACK_RIGHT][BACK_CENTER]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_SIDE_LEFT){
            matrix[ SIDE_LEFT][BACK_CENTER]+= M_SQRT1_2;
            matrix[SIDE_RIGHT][BACK_CENTER]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_FRONT_LEFT){
            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_ch_layout & AV_CH_FRONT_CENTER){
            matrix[ FRONT_CENTER][BACK_CENTER]+= surround_mix_level * M_SQRT1_2;
        }else
            av_assert0(0);
    }
    if(unaccounted & AV_CH_BACK_LEFT){
        if(out_ch_layout & AV_CH_BACK_CENTER){
            matrix[BACK_CENTER][ BACK_LEFT]+= M_SQRT1_2;
            matrix[BACK_CENTER][BACK_RIGHT]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_SIDE_LEFT){
            if(in_ch_layout & AV_CH_SIDE_LEFT){
                matrix[ SIDE_LEFT][ BACK_LEFT]+= M_SQRT1_2;
                matrix[SIDE_RIGHT][BACK_RIGHT]+= M_SQRT1_2;
            }else{
            matrix[ SIDE_LEFT][ BACK_LEFT]+= 1.0;
            matrix[SIDE_RIGHT][BACK_RIGHT]+= 1.0;
            }
        }else if(out_ch_layout & AV_CH_FRONT_LEFT){
            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_ch_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;
        }else
            av_assert0(0);
    }

    if(unaccounted & AV_CH_SIDE_LEFT){
        if(out_ch_layout & AV_CH_BACK_LEFT){
            /* if back channels do not exist in the input, just copy side
               channels to back channels, otherwise mix side into back */
            if (in_ch_layout & AV_CH_BACK_LEFT) {
                matrix[BACK_LEFT ][SIDE_LEFT ] += M_SQRT1_2;
                matrix[BACK_RIGHT][SIDE_RIGHT] += M_SQRT1_2;
            } else {
                matrix[BACK_LEFT ][SIDE_LEFT ] += 1.0;
                matrix[BACK_RIGHT][SIDE_RIGHT] += 1.0;
            }
        }else if(out_ch_layout & AV_CH_BACK_CENTER){
            matrix[BACK_CENTER][ SIDE_LEFT]+= M_SQRT1_2;
            matrix[BACK_CENTER][SIDE_RIGHT]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_FRONT_LEFT){
            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_ch_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;
        }else
            av_assert0(0);
    }

    if(unaccounted & AV_CH_FRONT_LEFT_OF_CENTER){
        if(out_ch_layout & AV_CH_FRONT_LEFT){
            matrix[ FRONT_LEFT][ FRONT_LEFT_OF_CENTER]+= 1.0;
            matrix[FRONT_RIGHT][FRONT_RIGHT_OF_CENTER]+= 1.0;
        }else if(out_ch_layout & AV_CH_FRONT_CENTER){
            matrix[ FRONT_CENTER][ FRONT_LEFT_OF_CENTER]+= M_SQRT1_2;
            matrix[ FRONT_CENTER][FRONT_RIGHT_OF_CENTER]+= M_SQRT1_2;
        }else
            av_assert0(0);
    }
    /* mix LFE into front left/right or center */
    if (unaccounted & AV_CH_LOW_FREQUENCY) {
        if (out_ch_layout & AV_CH_FRONT_CENTER) {
            matrix[FRONT_CENTER][LOW_FREQUENCY] += lfe_mix_level;
        } else if (out_ch_layout & AV_CH_FRONT_LEFT) {
            matrix[FRONT_LEFT ][LOW_FREQUENCY] += lfe_mix_level * M_SQRT1_2;
            matrix[FRONT_RIGHT][LOW_FREQUENCY] += lfe_mix_level * M_SQRT1_2;
        } else
            av_assert0(0);
    }

    for(out_i=i=0; i<64; i++){
        double sum=0;
        int in_i=0;
        if((out_ch_layout & (1ULL<<i)) == 0)
            continue;
        for(j=0; j<64; j++){
            if((in_ch_layout & (1ULL<<j)) == 0)
               continue;
            if (i < FF_ARRAY_ELEMS(matrix) && j < FF_ARRAY_ELEMS(matrix[0]))
                matrix_param[stride*out_i + in_i] = matrix[i][j];
            else
                matrix_param[stride*out_i + in_i] = i == j && (in_ch_layout & out_ch_layout & (1ULL<<i));
            sum += fabs(matrix_param[stride*out_i + in_i]);
            in_i++;
        }
        maxcoef= FFMAX(maxcoef, sum);
        out_i++;
    }
    if(rematrix_volume  < 0)
        maxcoef = -rematrix_volume;

    if(maxcoef > maxval || rematrix_volume  < 0){
        maxcoef /= maxval;
        for(i=0; i<SWR_CH_MAX; i++)
            for(j=0; j<SWR_CH_MAX; j++){
                matrix_param[stride*i + j] /= maxcoef;
            }
    }

    if(rematrix_volume > 0){
        for(i=0; i<SWR_CH_MAX; i++)
            for(j=0; j<SWR_CH_MAX; j++){
                matrix_param[stride*i + j] *= rematrix_volume;
            }
    }

    av_log(log_context, AV_LOG_DEBUG, "Matrix coefficients:\n");
    for(i=0; i<av_get_channel_layout_nb_channels(out_ch_layout); i++){
        const char *c =
            av_get_channel_name(av_channel_layout_extract_channel(out_ch_layout, i));
        av_log(log_context, AV_LOG_DEBUG, "%s: ", c ? c : "?");
        for(j=0; j<av_get_channel_layout_nb_channels(in_ch_layout); j++){
            c = av_get_channel_name(av_channel_layout_extract_channel(in_ch_layout, j));
            av_log(log_context, AV_LOG_DEBUG, "%s:%f ", c ? c : "?", matrix_param[stride*i + j]);
        }
        av_log(log_context, AV_LOG_DEBUG, "\n");
    }
    return 0;
}
コード例 #8
0
av_cold static int auto_matrix(SwrContext *s)
{
    int i, j, out_i;
    double matrix[NUM_NAMED_CHANNELS][NUM_NAMED_CHANNELS]={{0}};
    int64_t unaccounted, in_ch_layout, out_ch_layout;
    double maxcoef=0;
    char buf[128];
    const int matrix_encoding = s->matrix_encoding;
    float maxval;

    in_ch_layout = clean_layout(s, s->in_ch_layout);
    out_ch_layout = clean_layout(s, s->out_ch_layout);

    if(   out_ch_layout == AV_CH_LAYOUT_STEREO_DOWNMIX
       && (in_ch_layout & AV_CH_LAYOUT_STEREO_DOWNMIX) == 0
    )
        out_ch_layout = AV_CH_LAYOUT_STEREO;

    if(    in_ch_layout == AV_CH_LAYOUT_STEREO_DOWNMIX
       && (out_ch_layout & AV_CH_LAYOUT_STEREO_DOWNMIX) == 0
    )
        in_ch_layout = AV_CH_LAYOUT_STEREO;

    if(!sane_layout(in_ch_layout)){
        av_get_channel_layout_string(buf, sizeof(buf), -1, s->in_ch_layout);
        av_log(s, AV_LOG_ERROR, "Input channel layout '%s' is not supported\n", buf);
        return AVERROR(EINVAL);
    }

    if(!sane_layout(out_ch_layout)){
        av_get_channel_layout_string(buf, sizeof(buf), -1, s->out_ch_layout);
        av_log(s, AV_LOG_ERROR, "Output channel layout '%s' is not supported\n", buf);
        return AVERROR(EINVAL);
    }

    memset(s->matrix, 0, sizeof(s->matrix));
    for(i=0; i<FF_ARRAY_ELEMS(matrix); i++){
        if(in_ch_layout & out_ch_layout & (1ULL<<i))
            matrix[i][i]= 1.0;
    }

    unaccounted= in_ch_layout & ~out_ch_layout;

//FIXME implement dolby surround
//FIXME implement full ac3


    if(unaccounted & AV_CH_FRONT_CENTER){
        if((out_ch_layout & AV_CH_LAYOUT_STEREO) == AV_CH_LAYOUT_STEREO){
            if(in_ch_layout & AV_CH_LAYOUT_STEREO) {
                matrix[ FRONT_LEFT][FRONT_CENTER]+= s->clev;
                matrix[FRONT_RIGHT][FRONT_CENTER]+= s->clev;
            } else {
                matrix[ FRONT_LEFT][FRONT_CENTER]+= M_SQRT1_2;
                matrix[FRONT_RIGHT][FRONT_CENTER]+= M_SQRT1_2;
            }
        }else
            av_assert0(0);
    }
    if(unaccounted & AV_CH_LAYOUT_STEREO){
        if(out_ch_layout & AV_CH_FRONT_CENTER){
            matrix[FRONT_CENTER][ FRONT_LEFT]+= M_SQRT1_2;
            matrix[FRONT_CENTER][FRONT_RIGHT]+= M_SQRT1_2;
            if(in_ch_layout & AV_CH_FRONT_CENTER)
                matrix[FRONT_CENTER][ FRONT_CENTER] = s->clev*sqrt(2);
        }else
            av_assert0(0);
    }

    if(unaccounted & AV_CH_BACK_CENTER){
        if(out_ch_layout & AV_CH_BACK_LEFT){
            matrix[ BACK_LEFT][BACK_CENTER]+= M_SQRT1_2;
            matrix[BACK_RIGHT][BACK_CENTER]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_SIDE_LEFT){
            matrix[ SIDE_LEFT][BACK_CENTER]+= M_SQRT1_2;
            matrix[SIDE_RIGHT][BACK_CENTER]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_FRONT_LEFT){
            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] -= s->slev * M_SQRT1_2;
                    matrix[FRONT_RIGHT][BACK_CENTER] += s->slev * M_SQRT1_2;
                } else {
                    matrix[FRONT_LEFT ][BACK_CENTER] -= s->slev;
                    matrix[FRONT_RIGHT][BACK_CENTER] += s->slev;
                }
            } else {
                matrix[ FRONT_LEFT][BACK_CENTER]+= s->slev*M_SQRT1_2;
                matrix[FRONT_RIGHT][BACK_CENTER]+= s->slev*M_SQRT1_2;
            }
        }else if(out_ch_layout & AV_CH_FRONT_CENTER){
            matrix[ FRONT_CENTER][BACK_CENTER]+= s->slev*M_SQRT1_2;
        }else
            av_assert0(0);
    }
    if(unaccounted & AV_CH_BACK_LEFT){
        if(out_ch_layout & AV_CH_BACK_CENTER){
            matrix[BACK_CENTER][ BACK_LEFT]+= M_SQRT1_2;
            matrix[BACK_CENTER][BACK_RIGHT]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_SIDE_LEFT){
            if(in_ch_layout & AV_CH_SIDE_LEFT){
                matrix[ SIDE_LEFT][ BACK_LEFT]+= M_SQRT1_2;
                matrix[SIDE_RIGHT][BACK_RIGHT]+= M_SQRT1_2;
            }else{
            matrix[ SIDE_LEFT][ BACK_LEFT]+= 1.0;
            matrix[SIDE_RIGHT][BACK_RIGHT]+= 1.0;
            }
        }else if(out_ch_layout & AV_CH_FRONT_LEFT){
            if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY) {
                matrix[FRONT_LEFT ][BACK_LEFT ] -= s->slev * M_SQRT1_2;
                matrix[FRONT_LEFT ][BACK_RIGHT] -= s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][BACK_LEFT ] += s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][BACK_RIGHT] += s->slev * M_SQRT1_2;
            } else if (matrix_encoding == AV_MATRIX_ENCODING_DPLII) {
                matrix[FRONT_LEFT ][BACK_LEFT ] -= s->slev * SQRT3_2;
                matrix[FRONT_LEFT ][BACK_RIGHT] -= s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][BACK_LEFT ] += s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][BACK_RIGHT] += s->slev * SQRT3_2;
            } else {
                matrix[ FRONT_LEFT][ BACK_LEFT] += s->slev;
                matrix[FRONT_RIGHT][BACK_RIGHT] += s->slev;
            }
        }else if(out_ch_layout & AV_CH_FRONT_CENTER){
            matrix[ FRONT_CENTER][BACK_LEFT ]+= s->slev*M_SQRT1_2;
            matrix[ FRONT_CENTER][BACK_RIGHT]+= s->slev*M_SQRT1_2;
        }else
            av_assert0(0);
    }

    if(unaccounted & AV_CH_SIDE_LEFT){
        if(out_ch_layout & AV_CH_BACK_LEFT){
            /* if back channels do not exist in the input, just copy side
               channels to back channels, otherwise mix side into back */
            if (in_ch_layout & AV_CH_BACK_LEFT) {
                matrix[BACK_LEFT ][SIDE_LEFT ] += M_SQRT1_2;
                matrix[BACK_RIGHT][SIDE_RIGHT] += M_SQRT1_2;
            } else {
                matrix[BACK_LEFT ][SIDE_LEFT ] += 1.0;
                matrix[BACK_RIGHT][SIDE_RIGHT] += 1.0;
            }
        }else if(out_ch_layout & AV_CH_BACK_CENTER){
            matrix[BACK_CENTER][ SIDE_LEFT]+= M_SQRT1_2;
            matrix[BACK_CENTER][SIDE_RIGHT]+= M_SQRT1_2;
        }else if(out_ch_layout & AV_CH_FRONT_LEFT){
            if (matrix_encoding == AV_MATRIX_ENCODING_DOLBY) {
                matrix[FRONT_LEFT ][SIDE_LEFT ] -= s->slev * M_SQRT1_2;
                matrix[FRONT_LEFT ][SIDE_RIGHT] -= s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][SIDE_LEFT ] += s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][SIDE_RIGHT] += s->slev * M_SQRT1_2;
            } else if (matrix_encoding == AV_MATRIX_ENCODING_DPLII) {
                matrix[FRONT_LEFT ][SIDE_LEFT ] -= s->slev * SQRT3_2;
                matrix[FRONT_LEFT ][SIDE_RIGHT] -= s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][SIDE_LEFT ] += s->slev * M_SQRT1_2;
                matrix[FRONT_RIGHT][SIDE_RIGHT] += s->slev * SQRT3_2;
            } else {
                matrix[ FRONT_LEFT][ SIDE_LEFT] += s->slev;
                matrix[FRONT_RIGHT][SIDE_RIGHT] += s->slev;
            }
        }else if(out_ch_layout & AV_CH_FRONT_CENTER){
            matrix[ FRONT_CENTER][SIDE_LEFT ]+= s->slev*M_SQRT1_2;
            matrix[ FRONT_CENTER][SIDE_RIGHT]+= s->slev*M_SQRT1_2;
        }else
            av_assert0(0);
    }

    if(unaccounted & AV_CH_FRONT_LEFT_OF_CENTER){
        if(out_ch_layout & AV_CH_FRONT_LEFT){
            matrix[ FRONT_LEFT][ FRONT_LEFT_OF_CENTER]+= 1.0;
            matrix[FRONT_RIGHT][FRONT_RIGHT_OF_CENTER]+= 1.0;
        }else if(out_ch_layout & AV_CH_FRONT_CENTER){
            matrix[ FRONT_CENTER][ FRONT_LEFT_OF_CENTER]+= M_SQRT1_2;
            matrix[ FRONT_CENTER][FRONT_RIGHT_OF_CENTER]+= M_SQRT1_2;
        }else
            av_assert0(0);
    }
    /* mix LFE into front left/right or center */
    if (unaccounted & AV_CH_LOW_FREQUENCY) {
        if (out_ch_layout & AV_CH_FRONT_CENTER) {
            matrix[FRONT_CENTER][LOW_FREQUENCY] += s->lfe_mix_level;
        } else if (out_ch_layout & AV_CH_FRONT_LEFT) {
            matrix[FRONT_LEFT ][LOW_FREQUENCY] += s->lfe_mix_level * M_SQRT1_2;
            matrix[FRONT_RIGHT][LOW_FREQUENCY] += s->lfe_mix_level * M_SQRT1_2;
        } else
            av_assert0(0);
    }

    for(out_i=i=0; i<64; i++){
        double sum=0;
        int in_i=0;
        if((out_ch_layout & (1ULL<<i)) == 0)
            continue;
        for(j=0; j<64; j++){
            if((in_ch_layout & (1ULL<<j)) == 0)
               continue;
            if (i < FF_ARRAY_ELEMS(matrix) && j < FF_ARRAY_ELEMS(matrix[0]))
                s->matrix[out_i][in_i]= matrix[i][j];
            else
                s->matrix[out_i][in_i]= i == j && (in_ch_layout & out_ch_layout & (1ULL<<i));
            sum += fabs(s->matrix[out_i][in_i]);
            in_i++;
        }
        maxcoef= FFMAX(maxcoef, sum);
        out_i++;
    }
    if(s->rematrix_volume  < 0)
        maxcoef = -s->rematrix_volume;

    if (s->rematrix_maxval > 0) {
        maxval = s->rematrix_maxval;
    } else if (   av_get_packed_sample_fmt(s->out_sample_fmt) < AV_SAMPLE_FMT_FLT
               || av_get_packed_sample_fmt(s->int_sample_fmt) < AV_SAMPLE_FMT_FLT) {
        maxval = 1.0;
    } else
        maxval = INT_MAX;

    if(maxcoef > maxval || s->rematrix_volume  < 0){
        maxcoef /= maxval;
        for(i=0; i<SWR_CH_MAX; i++)
            for(j=0; j<SWR_CH_MAX; j++){
                s->matrix[i][j] /= maxcoef;
            }
    }

    if(s->rematrix_volume > 0){
        for(i=0; i<SWR_CH_MAX; i++)
            for(j=0; j<SWR_CH_MAX; j++){
                s->matrix[i][j] *= s->rematrix_volume;
            }
    }

    av_log(s, AV_LOG_DEBUG, "Matrix coefficients:\n");
    for(i=0; i<av_get_channel_layout_nb_channels(out_ch_layout); i++){
        const char *c =
            av_get_channel_name(av_channel_layout_extract_channel(out_ch_layout, i));
        av_log(s, AV_LOG_DEBUG, "%s: ", c ? c : "?");
        for(j=0; j<av_get_channel_layout_nb_channels(in_ch_layout); j++){
            c = av_get_channel_name(av_channel_layout_extract_channel(in_ch_layout, j));
            av_log(s, AV_LOG_DEBUG, "%s:%f ", c ? c : "?", s->matrix[i][j]);
        }
        av_log(s, AV_LOG_DEBUG, "\n");
    }
    return 0;
}