static int filter_frame(AVFilterLink *inlink, AVFrame *buf) { AVFilterContext *ctx = inlink->dst; VolumeContext *vol = inlink->dst->priv; AVFilterLink *outlink = inlink->dst->outputs[0]; int nb_samples = buf->nb_samples; AVFrame *out_buf; int64_t pos; AVFrameSideData *sd = av_frame_get_side_data(buf, AV_FRAME_DATA_REPLAYGAIN); int ret; if (sd && vol->replaygain != REPLAYGAIN_IGNORE) { if (vol->replaygain != REPLAYGAIN_DROP) { AVReplayGain *replaygain = (AVReplayGain*)sd->data; int32_t gain = 100000; uint32_t peak = 100000; float g, p; if (vol->replaygain == REPLAYGAIN_TRACK && replaygain->track_gain != INT32_MIN) { gain = replaygain->track_gain; if (replaygain->track_peak != 0) peak = replaygain->track_peak; } else if (replaygain->album_gain != INT32_MIN) { gain = replaygain->album_gain; if (replaygain->album_peak != 0) peak = replaygain->album_peak; } else { av_log(inlink->dst, AV_LOG_WARNING, "Both ReplayGain gain " "values are unknown.\n"); } g = gain / 100000.0f; p = peak / 100000.0f; av_log(inlink->dst, AV_LOG_VERBOSE, "Using gain %f dB from replaygain side data.\n", g); vol->volume = ff_exp10((g + vol->replaygain_preamp) / 20); if (vol->replaygain_noclip) vol->volume = FFMIN(vol->volume, 1.0 / p); vol->volume_i = (int)(vol->volume * 256 + 0.5); volume_init(vol); } av_frame_remove_side_data(buf, AV_FRAME_DATA_REPLAYGAIN); } if (isnan(vol->var_values[VAR_STARTPTS])) { vol->var_values[VAR_STARTPTS] = TS2D(buf->pts); vol->var_values[VAR_STARTT ] = TS2T(buf->pts, inlink->time_base); } vol->var_values[VAR_PTS] = TS2D(buf->pts); vol->var_values[VAR_T ] = TS2T(buf->pts, inlink->time_base); vol->var_values[VAR_N ] = inlink->frame_count_out; pos = buf->pkt_pos; vol->var_values[VAR_POS] = pos == -1 ? NAN : pos; if (vol->eval_mode == EVAL_MODE_FRAME) set_volume(ctx); if (vol->volume == 1.0 || vol->volume_i == 256) { out_buf = buf; goto end; } /* do volume scaling in-place if input buffer is writable */ if (av_frame_is_writable(buf) && (vol->precision != PRECISION_FIXED || vol->volume_i > 0)) { out_buf = buf; } else { out_buf = ff_get_audio_buffer(inlink, nb_samples); if (!out_buf) return AVERROR(ENOMEM); ret = av_frame_copy_props(out_buf, buf); if (ret < 0) { av_frame_free(&out_buf); av_frame_free(&buf); return ret; } } if (vol->precision != PRECISION_FIXED || vol->volume_i > 0) { int p, plane_samples; if (av_sample_fmt_is_planar(buf->format)) plane_samples = FFALIGN(nb_samples, vol->samples_align); else plane_samples = FFALIGN(nb_samples * vol->channels, vol->samples_align); if (vol->precision == PRECISION_FIXED) { for (p = 0; p < vol->planes; p++) { vol->scale_samples(out_buf->extended_data[p], buf->extended_data[p], plane_samples, vol->volume_i); } } else if (av_get_packed_sample_fmt(vol->sample_fmt) == AV_SAMPLE_FMT_FLT) { for (p = 0; p < vol->planes; p++) { vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p], (const float *)buf->extended_data[p], vol->volume, plane_samples); } } else { for (p = 0; p < vol->planes; p++) { vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p], (const double *)buf->extended_data[p], vol->volume, plane_samples); } } } emms_c(); if (buf != out_buf) av_frame_free(&buf); end: vol->var_values[VAR_NB_CONSUMED_SAMPLES] += out_buf->nb_samples; return ff_filter_frame(outlink, out_buf); }