2008-02-15 21:58:25 +00:00
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/*
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* Filter layer - default implementations
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* copyright (c) 2007 Bobby Bingham
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2010-07-30 00:29:50 +00:00
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#include "libavcore/imgutils.h"
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2010-08-17 18:08:03 +00:00
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#include "libavcodec/audioconvert.h"
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2008-02-15 21:58:25 +00:00
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#include "avfilter.h"
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/* TODO: buffer pool. see comment for avfilter_default_get_video_buffer() */
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2010-07-17 10:44:14 +00:00
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static void avfilter_default_free_buffer(AVFilterBuffer *ptr)
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2008-02-15 21:58:25 +00:00
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{
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2010-07-17 10:44:14 +00:00
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av_free(ptr->data[0]);
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av_free(ptr);
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2008-02-15 21:58:25 +00:00
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}
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/* TODO: set the buffer's priv member to a context structure for the whole
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* filter chain. This will allow for a buffer pool instead of the constant
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* alloc & free cycle currently implemented. */
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2010-08-07 01:15:19 +00:00
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AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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2008-02-15 21:58:25 +00:00
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{
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2010-07-17 10:44:14 +00:00
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AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
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2010-08-17 15:12:28 +00:00
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AVFilterBufferRef *ref = NULL;
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2008-02-15 22:00:13 +00:00
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int i, tempsize;
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2010-08-17 15:12:28 +00:00
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char *buf = NULL;
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if (!pic || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
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goto fail;
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2008-02-15 21:58:25 +00:00
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2010-08-11 11:06:04 +00:00
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ref->buf = pic;
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ref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps));
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ref->video->w = w;
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ref->video->h = h;
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2008-02-15 21:59:57 +00:00
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/* make sure the buffer gets read permission or it's useless for output */
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ref->perms = perms | AV_PERM_READ;
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2008-02-15 21:58:25 +00:00
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pic->refcount = 1;
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2010-08-07 00:02:26 +00:00
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ref->format = link->format;
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2010-07-17 10:44:14 +00:00
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pic->free = avfilter_default_free_buffer;
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2010-09-07 19:15:29 +00:00
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av_image_fill_linesizes(pic->linesize, ref->format, ref->video->w);
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2008-02-15 22:00:13 +00:00
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2010-08-17 18:08:09 +00:00
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for (i = 0; i < 4; i++)
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2009-05-22 21:32:13 +00:00
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pic->linesize[i] = FFALIGN(pic->linesize[i], 16);
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2008-02-15 22:00:13 +00:00
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2010-09-07 19:15:29 +00:00
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tempsize = av_image_fill_pointers(pic->data, ref->format, ref->video->h, NULL, pic->linesize);
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2010-05-10 00:28:18 +00:00
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buf = av_malloc(tempsize + 16); // +2 is needed for swscaler, +16 to be
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// SIMD-friendly
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2010-08-17 15:12:28 +00:00
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if (!buf)
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goto fail;
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2010-09-07 19:15:29 +00:00
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av_image_fill_pointers(pic->data, ref->format, ref->video->h, buf, pic->linesize);
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2008-02-15 21:58:25 +00:00
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2010-08-11 15:25:42 +00:00
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memcpy(ref->data, pic->data, sizeof(ref->data));
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memcpy(ref->linesize, pic->linesize, sizeof(ref->linesize));
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2008-02-15 21:58:25 +00:00
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return ref;
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2010-08-17 15:12:28 +00:00
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fail:
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av_free(buf);
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if (ref && ref->video)
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av_free(ref->video);
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av_free(ref);
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av_free(pic);
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return NULL;
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2008-02-15 21:58:25 +00:00
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}
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2010-08-17 18:08:03 +00:00
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AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int perms,
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enum SampleFormat sample_fmt, int size,
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int64_t channel_layout, int planar)
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{
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AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
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AVFilterBufferRef *ref = NULL;
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int i, sample_size, chans_nb, bufsize, per_channel_size, step_size = 0;
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char *buf;
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if (!samples || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
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goto fail;
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ref->buf = samples;
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ref->format = sample_fmt;
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ref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps));
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if (!ref->audio)
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goto fail;
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ref->audio->channel_layout = channel_layout;
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ref->audio->size = size;
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ref->audio->planar = planar;
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/* make sure the buffer gets read permission or it's useless for output */
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ref->perms = perms | AV_PERM_READ;
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samples->refcount = 1;
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samples->free = avfilter_default_free_buffer;
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sample_size = av_get_bits_per_sample_format(sample_fmt) >>3;
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chans_nb = avcodec_channel_layout_num_channels(channel_layout);
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per_channel_size = size/chans_nb;
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ref->audio->samples_nb = per_channel_size/sample_size;
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/* Set the number of bytes to traverse to reach next sample of a particular channel:
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* For planar, this is simply the sample size.
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* For packed, this is the number of samples * sample_size.
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*/
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for (i = 0; i < chans_nb; i++)
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samples->linesize[i] = planar > 0 ? per_channel_size : sample_size;
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memset(&samples->linesize[chans_nb], 0, (8-chans_nb) * sizeof(samples->linesize[0]));
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/* Calculate total buffer size, round to multiple of 16 to be SIMD friendly */
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bufsize = (size + 15)&~15;
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buf = av_malloc(bufsize);
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if (!buf)
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goto fail;
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/* For planar, set the start point of each channel's data within the buffer
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* For packed, set the start point of the entire buffer only
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*/
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samples->data[0] = buf;
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if (buf && planar) {
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for (i = 1; i < chans_nb; i++) {
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step_size += per_channel_size;
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samples->data[i] = buf + step_size;
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}
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} else {
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for (i = 1; i < chans_nb; i++)
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samples->data[i] = buf;
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}
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memset(&samples->data[chans_nb], 0, (8-chans_nb) * sizeof(samples->data[0]));
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memcpy(ref->data, samples->data, sizeof(ref->data));
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memcpy(ref->linesize, samples->linesize, sizeof(ref->linesize));
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return ref;
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fail:
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av_free(buf);
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if (ref && ref->audio)
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av_free(ref->audio);
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av_free(ref);
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av_free(samples);
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return NULL;
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}
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2010-10-10 18:54:45 +00:00
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void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
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2008-02-15 21:58:25 +00:00
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{
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2010-10-10 18:54:45 +00:00
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AVFilterLink *outlink = NULL;
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2008-02-15 21:58:25 +00:00
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2010-10-10 18:54:45 +00:00
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if (inlink->dst->output_count)
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outlink = inlink->dst->outputs[0];
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2008-02-15 21:58:25 +00:00
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2010-10-10 18:54:45 +00:00
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if (outlink) {
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outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
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avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
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2008-02-15 21:58:25 +00:00
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}
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}
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2010-10-10 18:54:45 +00:00
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void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
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2009-01-11 22:05:48 +00:00
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{
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2010-10-10 18:54:45 +00:00
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AVFilterLink *outlink = NULL;
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2009-01-11 22:05:48 +00:00
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2010-10-10 18:54:45 +00:00
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if (inlink->dst->output_count)
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outlink = inlink->dst->outputs[0];
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2009-01-11 22:05:48 +00:00
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2010-10-10 18:54:45 +00:00
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if (outlink)
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avfilter_draw_slice(outlink, y, h, slice_dir);
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2009-01-11 22:05:48 +00:00
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}
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2010-10-10 18:54:45 +00:00
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void avfilter_default_end_frame(AVFilterLink *inlink)
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2008-02-15 21:58:25 +00:00
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{
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2010-10-10 18:54:45 +00:00
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AVFilterLink *outlink = NULL;
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2008-02-15 21:58:25 +00:00
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2010-10-10 18:54:45 +00:00
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if (inlink->dst->output_count)
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outlink = inlink->dst->outputs[0];
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2008-02-15 21:58:25 +00:00
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2010-10-10 18:54:45 +00:00
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avfilter_unref_buffer(inlink->cur_buf);
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inlink->cur_buf = NULL;
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2008-02-15 21:58:25 +00:00
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2010-10-10 18:54:45 +00:00
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if (outlink) {
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if (outlink->out_buf) {
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avfilter_unref_buffer(outlink->out_buf);
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outlink->out_buf = NULL;
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2008-02-15 21:59:41 +00:00
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}
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2010-10-10 18:54:45 +00:00
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avfilter_end_frame(outlink);
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2008-02-15 21:58:25 +00:00
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}
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}
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2010-08-17 18:08:03 +00:00
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/* FIXME: samplesref is same as link->cur_buf. Need to consider removing the redundant parameter. */
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2010-10-10 18:54:45 +00:00
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void avfilter_default_filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
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2010-08-17 18:08:03 +00:00
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{
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AVFilterLink *outlink = NULL;
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2010-10-10 18:54:45 +00:00
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if (inlink->dst->output_count)
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outlink = inlink->dst->outputs[0];
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2010-08-17 18:08:03 +00:00
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if (outlink) {
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2010-10-10 18:54:45 +00:00
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outlink->out_buf = avfilter_default_get_audio_buffer(inlink, AV_PERM_WRITE, samplesref->format,
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2010-08-17 18:08:03 +00:00
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samplesref->audio->size,
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samplesref->audio->channel_layout,
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samplesref->audio->planar);
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outlink->out_buf->pts = samplesref->pts;
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outlink->out_buf->audio->sample_rate = samplesref->audio->sample_rate;
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avfilter_filter_samples(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
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avfilter_unref_buffer(outlink->out_buf);
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outlink->out_buf = NULL;
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}
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avfilter_unref_buffer(samplesref);
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2010-10-10 18:54:45 +00:00
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inlink->cur_buf = NULL;
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2010-08-17 18:08:03 +00:00
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}
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2008-02-15 21:58:25 +00:00
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/**
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* default config_link() implementation for output video links to simplify
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* the implementation of one input one output video filters */
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int avfilter_default_config_output_link(AVFilterLink *link)
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{
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2010-08-17 18:08:09 +00:00
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if (link->src->input_count && link->src->inputs[0]) {
|
2010-08-17 18:08:03 +00:00
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if (link->type == AVMEDIA_TYPE_VIDEO) {
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link->w = link->src->inputs[0]->w;
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link->h = link->src->inputs[0]->h;
|
2010-10-10 22:26:14 +00:00
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link->time_base = link->src->inputs[0]->time_base;
|
2010-08-17 18:08:03 +00:00
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} else if (link->type == AVMEDIA_TYPE_AUDIO) {
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link->channel_layout = link->src->inputs[0]->channel_layout;
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link->sample_rate = link->src->inputs[0]->sample_rate;
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}
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2008-02-15 21:58:25 +00:00
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} else {
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/* XXX: any non-simple filter which would cause this branch to be taken
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* really should implement its own config_props() for this link. */
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2008-02-15 22:00:00 +00:00
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return -1;
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2008-02-15 21:58:25 +00:00
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}
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return 0;
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}
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/**
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2008-02-15 22:00:03 +00:00
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* A helper for query_formats() which sets all links to the same list of
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* formats. If there are no links hooked to this filter, the list of formats is
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* freed.
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*
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* FIXME: this will need changed for filters with a mix of pad types
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* (video + audio, etc)
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*/
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void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
|
2008-02-15 21:58:25 +00:00
|
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{
|
2008-02-15 22:00:03 +00:00
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int count = 0, i;
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|
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|
2010-08-17 18:08:09 +00:00
|
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for (i = 0; i < ctx->input_count; i++) {
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if (ctx->inputs[i]) {
|
2008-02-15 22:00:03 +00:00
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avfilter_formats_ref(formats, &ctx->inputs[i]->out_formats);
|
2010-08-17 18:08:09 +00:00
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count++;
|
2008-02-15 22:00:03 +00:00
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}
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}
|
2010-08-17 18:08:09 +00:00
|
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for (i = 0; i < ctx->output_count; i++) {
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|
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if (ctx->outputs[i]) {
|
2008-02-15 22:00:03 +00:00
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avfilter_formats_ref(formats, &ctx->outputs[i]->in_formats);
|
2010-08-17 18:08:09 +00:00
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count++;
|
2008-02-15 22:00:03 +00:00
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}
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}
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|
2010-08-17 18:08:09 +00:00
|
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|
if (!count) {
|
2008-02-15 22:00:03 +00:00
|
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av_free(formats->formats);
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av_free(formats->refs);
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av_free(formats);
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}
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|
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}
|
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|
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|
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int avfilter_default_query_formats(AVFilterContext *ctx)
|
|
|
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{
|
2010-09-24 20:01:38 +00:00
|
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|
enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
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|
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ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
|
2010-07-22 11:12:47 +00:00
|
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|
AVMEDIA_TYPE_VIDEO;
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|
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avfilter_set_common_formats(ctx, avfilter_all_formats(type));
|
2008-02-15 22:00:03 +00:00
|
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|
return 0;
|
2008-02-15 21:58:25 +00:00
|
|
|
}
|
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2010-08-07 01:15:19 +00:00
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void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
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2010-03-18 23:12:48 +00:00
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{
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avfilter_start_frame(link->dst->outputs[0], picref);
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}
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void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
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{
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avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
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}
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void avfilter_null_end_frame(AVFilterLink *link)
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{
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avfilter_end_frame(link->dst->outputs[0]);
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}
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2010-08-17 18:08:03 +00:00
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void avfilter_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
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{
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avfilter_filter_samples(link->dst->outputs[0], samplesref);
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}
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|
2010-08-07 01:15:19 +00:00
|
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AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
|
2010-03-18 23:12:48 +00:00
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{
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return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
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}
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2010-08-17 18:08:03 +00:00
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AVFilterBufferRef *avfilter_null_get_audio_buffer(AVFilterLink *link, int perms,
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enum SampleFormat sample_fmt, int size,
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|
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int64_t channel_layout, int packed)
|
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|
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{
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return avfilter_get_audio_buffer(link->dst->outputs[0], perms, sample_fmt,
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size, channel_layout, packed);
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}
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