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481 lines
15 KiB
481 lines
15 KiB
/* |
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* Copyright (c) 2008 Vitor Sessak |
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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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|
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/** |
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* @file |
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* memory buffer source filter |
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*/ |
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|
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#include "audio.h" |
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#include "avfilter.h" |
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#include "buffersrc.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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#include "avcodec.h" |
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#include "libavutil/audioconvert.h" |
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#include "libavutil/fifo.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/samplefmt.h" |
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|
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typedef struct { |
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const AVClass *class; |
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AVFifoBuffer *fifo; |
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AVRational time_base; ///< time_base to set in the output link |
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AVRational frame_rate; ///< frame_rate to set in the output link |
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unsigned nb_failed_requests; |
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unsigned warning_limit; |
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/* video only */ |
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int w, h; |
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enum PixelFormat pix_fmt; |
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AVRational pixel_aspect; |
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char *sws_param; |
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/* audio only */ |
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int sample_rate; |
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enum AVSampleFormat sample_fmt; |
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char *sample_fmt_str; |
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uint64_t channel_layout; |
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char *channel_layout_str; |
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int eof; |
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} BufferSourceContext; |
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#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\ |
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if (c->w != width || c->h != height || c->pix_fmt != format) {\ |
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av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\ |
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return AVERROR(EINVAL);\ |
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} |
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#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, format)\ |
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if (c->sample_fmt != format || c->sample_rate != srate ||\ |
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c->channel_layout != ch_layout) {\ |
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av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\ |
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return AVERROR(EINVAL);\ |
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} |
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static AVFilterBufferRef *copy_buffer_ref(AVFilterContext *ctx, |
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AVFilterBufferRef *ref) |
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{ |
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AVFilterLink *outlink = ctx->outputs[0]; |
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AVFilterBufferRef *buf; |
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int channels; |
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switch (outlink->type) { |
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case AVMEDIA_TYPE_VIDEO: |
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buf = ff_get_video_buffer(outlink, AV_PERM_WRITE, |
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ref->video->w, ref->video->h); |
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if(!buf) |
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return NULL; |
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av_image_copy(buf->data, buf->linesize, |
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(void*)ref->data, ref->linesize, |
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ref->format, ref->video->w, ref->video->h); |
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break; |
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case AVMEDIA_TYPE_AUDIO: |
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buf = ff_get_audio_buffer(outlink, AV_PERM_WRITE, |
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ref->audio->nb_samples); |
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if(!buf) |
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return NULL; |
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channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout); |
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av_samples_copy(buf->extended_data, ref->buf->extended_data, |
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0, 0, ref->audio->nb_samples, |
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channels, |
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ref->format); |
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break; |
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default: |
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return NULL; |
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} |
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avfilter_copy_buffer_ref_props(buf, ref); |
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return buf; |
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} |
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int av_buffersrc_add_frame(AVFilterContext *buffer_src, |
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const AVFrame *frame, int flags) |
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{ |
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AVFilterBufferRef *picref; |
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int ret; |
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if (!frame) /* NULL for EOF */ |
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return av_buffersrc_add_ref(buffer_src, NULL, flags); |
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switch (buffer_src->outputs[0]->type) { |
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case AVMEDIA_TYPE_VIDEO: |
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picref = avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE); |
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break; |
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case AVMEDIA_TYPE_AUDIO: |
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picref = avfilter_get_audio_buffer_ref_from_frame(frame, AV_PERM_WRITE); |
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break; |
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default: |
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return AVERROR(ENOSYS); |
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} |
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if (!picref) |
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return AVERROR(ENOMEM); |
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ret = av_buffersrc_add_ref(buffer_src, picref, flags); |
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picref->buf->data[0] = NULL; |
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avfilter_unref_buffer(picref); |
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return ret; |
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} |
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int av_buffersrc_write_frame(AVFilterContext *buffer_filter, AVFrame *frame) |
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{ |
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return av_buffersrc_add_frame(buffer_filter, frame, 0); |
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} |
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int av_buffersrc_add_ref(AVFilterContext *s, AVFilterBufferRef *buf, int flags) |
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{ |
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BufferSourceContext *c = s->priv; |
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AVFilterBufferRef *to_free = NULL; |
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int ret; |
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if (!buf) { |
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c->eof = 1; |
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return 0; |
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} else if (c->eof) |
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return AVERROR(EINVAL); |
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if (!av_fifo_space(c->fifo) && |
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(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) + |
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sizeof(buf))) < 0) |
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return ret; |
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if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) { |
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switch (s->outputs[0]->type) { |
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case AVMEDIA_TYPE_VIDEO: |
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CHECK_VIDEO_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format); |
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break; |
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case AVMEDIA_TYPE_AUDIO: |
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CHECK_AUDIO_PARAM_CHANGE(s, c, buf->audio->sample_rate, buf->audio->channel_layout, |
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buf->format); |
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break; |
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default: |
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return AVERROR(EINVAL); |
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} |
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} |
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if (!(flags & AV_BUFFERSRC_FLAG_NO_COPY)) |
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to_free = buf = copy_buffer_ref(s, buf); |
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if(!buf) |
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return -1; |
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if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) { |
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avfilter_unref_buffer(to_free); |
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return ret; |
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} |
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c->nb_failed_requests = 0; |
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if (c->warning_limit && |
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av_fifo_size(c->fifo) / sizeof(buf) >= c->warning_limit) { |
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av_log(s, AV_LOG_WARNING, |
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"%d buffers queued in %s, something may be wrong.\n", |
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c->warning_limit, |
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(char *)av_x_if_null(s->name, s->filter->name)); |
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c->warning_limit *= 10; |
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} |
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return 0; |
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} |
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#ifdef FF_API_BUFFERSRC_BUFFER |
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int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf) |
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{ |
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return av_buffersrc_add_ref(s, buf, AV_BUFFERSRC_FLAG_NO_COPY); |
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} |
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#endif |
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unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src) |
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{ |
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return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests; |
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} |
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#define OFFSET(x) offsetof(BufferSourceContext, x) |
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#define V AV_OPT_FLAG_VIDEO_PARAM |
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static const AVOption buffer_options[] = { |
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{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, V }, |
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{ "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, V }, |
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{ "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V }, |
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{ "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, .flags = V }, |
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{ "pixel_aspect", NULL, OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, V }, |
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{ "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = V }, |
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{ NULL }, |
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}; |
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#undef V |
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AVFILTER_DEFINE_CLASS(buffer); |
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static av_cold int init_video(AVFilterContext *ctx, const char *args) |
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{ |
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BufferSourceContext *c = ctx->priv; |
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char pix_fmt_str[128], sws_param[256] = "", *colon, *equal; |
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int ret, n = 0; |
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c->class = &buffer_class; |
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if (!args) { |
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av_log(ctx, AV_LOG_ERROR, "Arguments required\n"); |
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return AVERROR(EINVAL); |
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} |
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colon = strchr(args, ':'); |
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equal = strchr(args, '='); |
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if (equal && (!colon || equal < colon)) { |
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av_opt_set_defaults(c); |
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ret = av_set_options_string(c, args, "=", ":"); |
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if (ret < 0) { |
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: %s\n", args); |
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goto fail; |
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} |
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} else { |
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if ((n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str, |
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&c->time_base.num, &c->time_base.den, |
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&c->pixel_aspect.num, &c->pixel_aspect.den, sws_param)) < 7) { |
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av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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av_log(ctx, AV_LOG_WARNING, "Flat options syntax is deprecated, use key=value pairs\n"); |
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if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0) |
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goto fail; |
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c->sws_param = av_strdup(sws_param); |
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if (!c->sws_param) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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} |
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if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d sws_param:%s\n", |
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c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name, |
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c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den, |
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c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, "")); |
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c->warning_limit = 100; |
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return 0; |
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fail: |
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av_opt_free(c); |
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return ret; |
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} |
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#define A AV_OPT_FLAG_AUDIO_PARAM |
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static const AVOption abuffer_options[] = { |
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{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, A }, |
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{ "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { 0 }, 0, INT_MAX, A }, |
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{ "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = A }, |
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{ "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A }, |
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{ NULL }, |
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}; |
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AVFILTER_DEFINE_CLASS(abuffer); |
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static av_cold int init_audio(AVFilterContext *ctx, const char *args) |
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{ |
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BufferSourceContext *s = ctx->priv; |
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int ret = 0; |
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s->class = &abuffer_class; |
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av_opt_set_defaults(s); |
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if ((ret = av_set_options_string(s, args, "=", ":")) < 0) { |
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); |
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goto fail; |
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} |
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s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str); |
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if (s->sample_fmt == AV_SAMPLE_FMT_NONE) { |
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av_log(ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", |
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s->sample_fmt_str); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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s->channel_layout = av_get_channel_layout(s->channel_layout_str); |
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if (!s->channel_layout) { |
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av_log(ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", |
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s->channel_layout_str); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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if (!(s->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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if (!s->time_base.num) |
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s->time_base = (AVRational){1, s->sample_rate}; |
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av_log(ctx, AV_LOG_INFO, |
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"tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n", |
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s->time_base.num, s->time_base.den, s->sample_fmt_str, |
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s->sample_rate, s->channel_layout_str); |
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s->warning_limit = 100; |
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fail: |
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av_opt_free(s); |
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return ret; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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BufferSourceContext *s = ctx->priv; |
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while (s->fifo && av_fifo_size(s->fifo)) { |
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AVFilterBufferRef *buf; |
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av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL); |
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avfilter_unref_buffer(buf); |
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} |
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av_fifo_free(s->fifo); |
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s->fifo = NULL; |
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av_freep(&s->sws_param); |
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} |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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BufferSourceContext *c = ctx->priv; |
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AVFilterChannelLayouts *channel_layouts = NULL; |
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AVFilterFormats *formats = NULL; |
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AVFilterFormats *samplerates = NULL; |
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switch (ctx->outputs[0]->type) { |
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case AVMEDIA_TYPE_VIDEO: |
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ff_add_format(&formats, c->pix_fmt); |
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ff_set_common_formats(ctx, formats); |
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break; |
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case AVMEDIA_TYPE_AUDIO: |
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ff_add_format(&formats, c->sample_fmt); |
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ff_set_common_formats(ctx, formats); |
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ff_add_format(&samplerates, c->sample_rate); |
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ff_set_common_samplerates(ctx, samplerates); |
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ff_add_channel_layout(&channel_layouts, c->channel_layout); |
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ff_set_common_channel_layouts(ctx, channel_layouts); |
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break; |
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default: |
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return AVERROR(EINVAL); |
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} |
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return 0; |
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} |
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static int config_props(AVFilterLink *link) |
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{ |
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BufferSourceContext *c = link->src->priv; |
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switch (link->type) { |
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case AVMEDIA_TYPE_VIDEO: |
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link->w = c->w; |
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link->h = c->h; |
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link->sample_aspect_ratio = c->pixel_aspect; |
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break; |
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case AVMEDIA_TYPE_AUDIO: |
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link->channel_layout = c->channel_layout; |
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link->sample_rate = c->sample_rate; |
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break; |
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default: |
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return AVERROR(EINVAL); |
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} |
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link->time_base = c->time_base; |
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link->frame_rate = c->frame_rate; |
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return 0; |
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} |
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static int request_frame(AVFilterLink *link) |
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{ |
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BufferSourceContext *c = link->src->priv; |
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AVFilterBufferRef *buf; |
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if (!av_fifo_size(c->fifo)) { |
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if (c->eof) |
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return AVERROR_EOF; |
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c->nb_failed_requests++; |
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return AVERROR(EAGAIN); |
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} |
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av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL); |
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switch (link->type) { |
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case AVMEDIA_TYPE_VIDEO: |
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ff_start_frame(link, avfilter_ref_buffer(buf, ~0)); |
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ff_draw_slice(link, 0, link->h, 1); |
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ff_end_frame(link); |
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break; |
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case AVMEDIA_TYPE_AUDIO: |
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ff_filter_samples(link, avfilter_ref_buffer(buf, ~0)); |
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break; |
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default: |
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return AVERROR(EINVAL); |
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} |
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avfilter_unref_buffer(buf); |
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return 0; |
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} |
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static int poll_frame(AVFilterLink *link) |
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{ |
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BufferSourceContext *c = link->src->priv; |
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int size = av_fifo_size(c->fifo); |
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if (!size && c->eof) |
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return AVERROR_EOF; |
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return size/sizeof(AVFilterBufferRef*); |
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} |
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AVFilter avfilter_vsrc_buffer = { |
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.name = "buffer", |
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.description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."), |
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.priv_size = sizeof(BufferSourceContext), |
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.query_formats = query_formats, |
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.init = init_video, |
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.uninit = uninit, |
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.inputs = (AVFilterPad[]) {{ .name = NULL }}, |
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.outputs = (AVFilterPad[]) {{ .name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.request_frame = request_frame, |
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.poll_frame = poll_frame, |
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.config_props = config_props, }, |
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{ .name = NULL}}, |
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}; |
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AVFilter avfilter_asrc_abuffer = { |
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.name = "abuffer", |
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.description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."), |
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.priv_size = sizeof(BufferSourceContext), |
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.query_formats = query_formats, |
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.init = init_audio, |
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.uninit = uninit, |
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.inputs = (AVFilterPad[]) {{ .name = NULL }}, |
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.outputs = (AVFilterPad[]) {{ .name = "default", |
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.type = AVMEDIA_TYPE_AUDIO, |
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.request_frame = request_frame, |
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.poll_frame = poll_frame, |
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.config_props = config_props, }, |
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{ .name = NULL}}, |
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};
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