int ff_filter_samples_framed(AVFilterLink *link, AVFilterBufferRef *samplesref) { int (*filter_samples)(AVFilterLink *, AVFilterBufferRef *); AVFilterPad *src = link->srcpad; AVFilterPad *dst = link->dstpad; int64_t pts; AVFilterBufferRef *buf_out; int ret; FF_TPRINTF_START(NULL, filter_samples); ff_tlog_link(NULL, link, 1); if (link->closed) { avfilter_unref_buffer(samplesref); return AVERROR_EOF; } if (!(filter_samples = dst->filter_samples)) filter_samples = default_filter_samples; av_assert1((samplesref->perms & src->min_perms) == src->min_perms); samplesref->perms &= ~ src->rej_perms; /* prepare to copy the samples if the buffer has insufficient permissions */ if ((dst->min_perms & samplesref->perms) != dst->min_perms || dst->rej_perms & samplesref->perms) { av_log(link->dst, AV_LOG_DEBUG, "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n", samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms); buf_out = ff_default_get_audio_buffer(link, dst->min_perms, samplesref->audio->nb_samples); if (!buf_out) { avfilter_unref_buffer(samplesref); return AVERROR(ENOMEM); } buf_out->pts = samplesref->pts; buf_out->audio->sample_rate = samplesref->audio->sample_rate; /* Copy actual data into new samples buffer */ av_samples_copy(buf_out->extended_data, samplesref->extended_data, 0, 0, samplesref->audio->nb_samples, av_get_channel_layout_nb_channels(link->channel_layout), link->format); avfilter_unref_buffer(samplesref); } else buf_out = samplesref; link->cur_buf = buf_out; pts = buf_out->pts; ret = filter_samples(link, buf_out); ff_update_link_current_pts(link, pts); return ret; }
AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples) { AVFrame *ret = NULL; if (link->dstpad->get_audio_buffer) ret = link->dstpad->get_audio_buffer(link, nb_samples); if (!ret) ret = ff_default_get_audio_buffer(link, nb_samples); return ret; }
AVFilterBufferRef *ff_get_audio_buffer(AVFilterLink *link, int perms, int nb_samples) { AVFilterBufferRef *ret = NULL; if (link->dstpad->get_audio_buffer) ret = link->dstpad->get_audio_buffer(link, perms, nb_samples); if (!ret) ret = ff_default_get_audio_buffer(link, perms, nb_samples); if (ret) ret->type = AVMEDIA_TYPE_AUDIO; return ret; }
void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref) { void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *); AVFilterPad *dst = link->dstpad; int64_t pts; FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1); if (!(filter_samples = dst->filter_samples)) filter_samples = ff_default_filter_samples; /* prepare to copy the samples if the buffer has insufficient permissions */ if ((dst->min_perms & samplesref->perms) != dst->min_perms || dst->rej_perms & samplesref->perms) { int i, size, planar = av_sample_fmt_is_planar(samplesref->format); int planes = !planar ? 1: av_get_channel_layout_nb_channels(samplesref->audio->channel_layout); av_log(link->dst, AV_LOG_DEBUG, "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n", samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms); link->cur_buf = ff_default_get_audio_buffer(link, dst->min_perms, samplesref->audio->nb_samples); link->cur_buf->pts = samplesref->pts; link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate; /* Copy actual data into new samples buffer */ /* src can be larger than dst if it was allocated larger than necessary. dst can be slightly larger due to extra alignment padding. */ size = FFMIN(samplesref->linesize[0], link->cur_buf->linesize[0]); for (i = 0; samplesref->data[i] && i < 8; i++) memcpy(link->cur_buf->data[i], samplesref->data[i], size); for (i = 0; i < planes; i++) memcpy(link->cur_buf->extended_data[i], samplesref->extended_data[i], size); avfilter_unref_buffer(samplesref); } else link->cur_buf = samplesref; pts = link->cur_buf->pts; filter_samples(link, link->cur_buf); ff_update_link_current_pts(link, pts); }
/* FIXME: samplesref is same as link->cur_buf. Need to consider removing the redundant parameter. */ void ff_default_filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref) { AVFilterLink *outlink = NULL; if (inlink->dst->output_count) outlink = inlink->dst->outputs[0]; if (outlink) { outlink->out_buf = ff_default_get_audio_buffer(inlink, AV_PERM_WRITE, samplesref->audio->nb_samples); outlink->out_buf->pts = samplesref->pts; outlink->out_buf->audio->sample_rate = samplesref->audio->sample_rate; ff_filter_samples(outlink, avfilter_ref_buffer(outlink->out_buf, ~0)); avfilter_unref_buffer(outlink->out_buf); outlink->out_buf = NULL; } avfilter_unref_buffer(samplesref); inlink->cur_buf = NULL; }