mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-27 11:51:49 +02:00
457 lines
14 KiB
C
457 lines
14 KiB
C
/*
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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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* @file
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* memory buffer source filter
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*/
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.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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#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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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 AVPixelFormat 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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int channels;
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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_INFO, "Changing frame properties on the fly is not supported by all filters.\n");\
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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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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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picref = avfilter_get_buffer_ref_from_frame(buffer_src->outputs[0]->type,
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frame, AV_PERM_WRITE);
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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, const 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 = ff_copy_buffer_ref(s->outputs[0], 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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if ((flags & AV_BUFFERSRC_FLAG_PUSH))
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if ((ret = s->output_pads[0].request_frame(s->outputs[0])) < 0)
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return ret;
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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 FLAGS AV_OPT_FLAG_FILTERING_PARAM|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, { .dbl = 0 }, 0, INT_MAX, FLAGS },
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{ "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
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{ "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = FLAGS },
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{ "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, .flags = FLAGS },
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{ "pixel_aspect", NULL, OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
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{ "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = FLAGS },
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{ NULL },
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};
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#undef FLAGS
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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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goto fail;
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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_VERBOSE, "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_get_pix_fmt_name(c->pix_fmt),
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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 FLAGS AV_OPT_FLAG_FILTERING_PARAM|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, { .dbl = 0 }, 0, INT_MAX, FLAGS },
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{ "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
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{ "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
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{ "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
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{ "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
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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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goto fail;
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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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if (s->channel_layout_str) {
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int n;
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/* TODO reindent */
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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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n = av_get_channel_layout_nb_channels(s->channel_layout);
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if (s->channels) {
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if (n != s->channels) {
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av_log(ctx, AV_LOG_ERROR,
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"Mismatching channel count %d and layout '%s' "
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"(%d channels)\n",
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s->channels, s->channel_layout_str, n);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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}
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s->channels = n;
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} else if (!s->channels) {
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av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
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"channel layout specified\n");
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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_VERBOSE,
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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,
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c->channel_layout ? c->channel_layout :
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FF_COUNT2LAYOUT(c->channels));
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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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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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return ff_filter_frame(link, buf);
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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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static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
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{
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.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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},
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{ NULL }
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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 = NULL,
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.outputs = avfilter_vsrc_buffer_outputs,
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.priv_class = &buffer_class,
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};
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static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
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{
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.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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},
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{ 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 = NULL,
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.outputs = avfilter_asrc_abuffer_outputs,
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.priv_class = &abuffer_class,
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};
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