static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
SideDataContext *s = ctx->priv;
AVFrameSideData *sd = NULL;
if (s->type != -1)
sd = av_frame_get_side_data(frame, s->type);
switch (s->mode) {
case SIDEDATA_SELECT:
if (sd) {
return ff_filter_frame(outlink, frame);
}
break;
case SIDEDATA_DELETE:
if (s->type == -1) {
while (frame->nb_side_data)
av_frame_remove_side_data(frame, frame->side_data[0]->type);
} else if (sd) {
av_frame_remove_side_data(frame, s->type);
}
return ff_filter_frame(outlink, frame);
break;
default:
av_assert0(0);
};
av_frame_free(&frame);
return 0;
}
/* Write a frame to the output */
static int write_frame(AVFilterContext *ctx, FPSContext *s, AVFilterLink *outlink, int *again)
{
AVFrame *frame;
av_assert1(s->frames_count == 2 || (s->status && s->frames_count == 1));
/* We haven't yet determined the pts of the first frame */
if (s->next_pts == AV_NOPTS_VALUE) {
if (s->frames[0]->pts != AV_NOPTS_VALUE) {
s->next_pts = s->frames[0]->pts;
av_log(ctx, AV_LOG_VERBOSE, "Set first pts to %"PRId64"\n", s->next_pts);
} else {
av_log(ctx, AV_LOG_WARNING, "Discarding initial frame(s) with no "
"timestamp.\n");
frame = shift_frame(ctx, s);
av_frame_free(&frame);
*again = 1;
return 0;
}
}
/* There are two conditions where we want to drop a frame:
* - If we have two buffered frames and the second frame is acceptable
* as the next output frame, then drop the first buffered frame.
* - If we have status (EOF) set, drop frames when we hit the
* status timestamp. */
if ((s->frames_count == 2 && s->frames[1]->pts <= s->next_pts) ||
(s->status && s->status_pts <= s->next_pts)) {
frame = shift_frame(ctx, s);
av_frame_free(&frame);
*again = 1;
return 0;
/* Output a copy of the first buffered frame */
} else {
frame = av_frame_clone(s->frames[0]);
if (!frame)
return AVERROR(ENOMEM);
// Make sure Closed Captions will not be duplicated
av_frame_remove_side_data(s->frames[0], AV_FRAME_DATA_A53_CC);
frame->pts = s->next_pts++;
av_log(ctx, AV_LOG_DEBUG, "Writing frame with pts %"PRId64" to pts %"PRId64"\n",
s->frames[0]->pts, frame->pts);
s->cur_frame_out++;
return ff_filter_frame(outlink, frame);
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
VolumeContext *vol = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
int nb_samples = buf->nb_samples;
AVFrame *out_buf;
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 = pow(10, (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 (vol->volume == 1.0 || vol->volume_i == 256)
return ff_filter_frame(outlink, buf);
/* do volume scaling in-place if input buffer is writable */
if (av_frame_is_writable(buf)) {
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);
return ff_filter_frame(outlink, out_buf);
}