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vsrc_buffer: make the source accept sws_param in init

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Avoid the need of two distinct av_vsrc_add_video_buffer_ref*
functions. Simplify the interface.
This commit is contained in:
Stefano Sabatini 2011-05-19 01:02:54 +02:00
parent 509b32cf5d
commit 50764e19a8
5 changed files with 24 additions and 26 deletions
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10
doc/filters.texi
View File

@ -1536,9 +1536,10 @@ This source is mainly intended for a programmatic use, in particular
through the interface defined in @file{libavfilter/vsrc_buffer.h}.
It accepts the following parameters:
@var{width}:@var{height}:@var{pix_fmt_string}:@var{timebase_num}:@var{timebase_den}:@var{sample_aspect_ratio_num}:@var{sample_aspect_ratio.den}
@var{width}:@var{height}:@var{pix_fmt_string}:@var{timebase_num}:@var{timebase_den}:@var{sample_aspect_ratio_num}:@var{sample_aspect_ratio.den}:@var{scale_params}
All the parameters need to be explicitely defined.
All the parameters but @var{scale_params} need to be explicitely
defined.
Follows the list of the accepted parameters.
@ -1559,6 +1560,11 @@ timestamps of the buffered frames.
@item sample_aspect_ratio.num, sample_aspect_ratio.den
Specify numerator and denominator of the sample aspect ratio assumed
by the video frames.
@item scale_params
Specify the optional parameters to be used for the scale filter which
is automatically inserted when an input change is detected in the
input size or format.
@end table
For example:

2
ffmpeg.c
View File

@ -1652,7 +1652,7 @@ static int output_packet(AVInputStream *ist, int ist_index,
picref =
avfilter_get_video_buffer_ref_from_frame(&picture, AV_PERM_WRITE);
av_vsrc_buffer_add_video_buffer_ref(ost->input_video_filter, picref, ""); //TODO user setable params
av_vsrc_buffer_add_video_buffer_ref(ost->input_video_filter, picref);
picref->buf->data[0] = NULL;
avfilter_unref_buffer(picref);
}

2
libavfilter/avfilter.h
View File

@ -26,7 +26,7 @@
#include "libavutil/samplefmt.h"
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 6
#define LIBAVFILTER_VERSION_MINOR 7
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

33
libavfilter/vsrc_buffer.c
View File

@ -37,8 +37,7 @@ typedef struct {
char sws_param[256];
} BufferSourceContext;
int av_vsrc_buffer_add_video_buffer_ref2(AVFilterContext *buffer_filter, AVFilterBufferRef *picref,
const char *sws_param)
int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter, AVFilterBufferRef *picref)
{
BufferSourceContext *c = buffer_filter->priv;
AVFilterLink *outlink = buffer_filter->outputs[0];
@ -52,13 +51,10 @@ int av_vsrc_buffer_add_video_buffer_ref2(AVFilterContext *buffer_filter, AVFilte
//return -1;
}
if (!c->sws_param[0]) {
snprintf(c->sws_param, 255, "%d:%d:%s", c->w, c->h, sws_param);
}
if (picref->video->w != c->w || picref->video->h != c->h || picref->format != c->pix_fmt) {
AVFilterContext *scale = buffer_filter->outputs[0]->dst;
AVFilterLink *link;
char scale_param[1024];
av_log(buffer_filter, AV_LOG_INFO,
"Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
@ -72,7 +68,8 @@ int av_vsrc_buffer_add_video_buffer_ref2(AVFilterContext *buffer_filter, AVFilte
if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0)
return ret;
if ((ret = avfilter_init_filter(scale, c->sws_param, NULL)) < 0) {
snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param);
if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) {
avfilter_free(scale);
return ret;
}
@ -85,8 +82,9 @@ int av_vsrc_buffer_add_video_buffer_ref2(AVFilterContext *buffer_filter, AVFilte
scale->outputs[0]->format= c->pix_fmt;
} else if (!strcmp(scale->filter->name, "scale")) {
snprintf(c->sws_param, 255, "%d:%d:%s", scale->outputs[0]->w, scale->outputs[0]->h, sws_param);
scale->filter->init(scale, c->sws_param, NULL);
snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s",
scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param);
scale->filter->init(scale, scale_param, NULL);
}
c->pix_fmt = scale->inputs[0]->format = picref->format;
@ -108,24 +106,21 @@ int av_vsrc_buffer_add_video_buffer_ref2(AVFilterContext *buffer_filter, AVFilte
return 0;
}
int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter, AVFilterBufferRef *picref)
{
return av_vsrc_buffer_add_video_buffer_ref2(buffer_filter, picref, "");
}
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
BufferSourceContext *c = ctx->priv;
char pix_fmt_str[128];
int n = 0;
*c->sws_param = 0;
if (!args ||
(n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
(n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
&c->time_base.num, &c->time_base.den,
&c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den)) != 7) {
av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but only %d found in '%s'\n", n, args);
&c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den, c->sws_param)) < 7) {
av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
return AVERROR(EINVAL);
}
if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == PIX_FMT_NONE) {
char *tail;
c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
@ -135,10 +130,10 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
}
}
av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d\n",
av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
c->time_base.num, c->time_base.den,
c->sample_aspect_ratio.num, c->sample_aspect_ratio.den);
c->sample_aspect_ratio.num, c->sample_aspect_ratio.den, c->sws_param);
return 0;
}

3
libavfilter/vsrc_buffer.h
View File

@ -31,7 +31,4 @@
int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter, AVFilterBufferRef *picref);
int av_vsrc_buffer_add_video_buffer_ref2(AVFilterContext *buffer_filter, AVFilterBufferRef *picref,
const char *sws_param);
#endif /* AVFILTER_VSRC_BUFFER_H */