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lavfi/buffersrc: update for compatibility with the fork.

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Merge and adapt commit d28cb84 by Anton Khirnov.
pull/21/head
Nicolas George 12 years ago
parent 2844ea86c8
commit 0d58bbb28d
2 changed files with 69 additions and 86 deletions
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  1. 23
      doc/filters.texi
  2. 132
      libavfilter/buffersrc.c

23
doc/filters.texi
Unescape View File

@ -1400,11 +1400,14 @@ Buffer audio frames, and make them available to the filter chain.
This source is mainly intended for a programmatic use, in particular
through the interface defined in @file{libavfilter/asrc_abuffer.h}.
It accepts the following mandatory parameters:
@var{sample_rate}:@var{sample_fmt}:@var{channel_layout}
It accepts the following named parameters:
@table @option
@item time_base
Timebase which will be used for timestamps of submitted frames. It must be
either a floating-point number or in @var{numerator}/@var{denominator} form.
@item sample_rate
The sample rate of the incoming audio buffers.
@ -1429,7 +1432,7 @@ must be consistent.
@subsection Examples
@example
abuffer=44100:s16p:stereo
abuffer=sample_rate=44100:sample_fmt=s16p:channel_layout=stereo
@end example
will instruct the source to accept planar 16bit signed stereo at 44100Hz.
@ -1437,7 +1440,7 @@ Since the sample format with name "s16p" corresponds to the number
6 and the "stereo" channel layout corresponds to the value 0x3, this is
equivalent to:
@example
abuffer=44100:6:0x3
abuffer=sample_rate=44100:sample_fmt=6:channel_layout=0x3
@end example
@section aevalsrc
@ -5743,6 +5746,12 @@ separated by ":". A description of the accepted options follows.
@item video_size
Specify the size (width and height) of the buffered video frames.
@item width
Input video width.
@item height
Input video height.
@item pix_fmt
A string representing the pixel format of the buffered video frames.
It may be a number corresponding to a pixel format, or a pixel format
@ -5751,10 +5760,10 @@ name.
@item time_base
Specify the timebase assumed by the timestamps of the buffered frames.
@item time_base
@item frame_rate
Specify the frame rate expected for the video stream.
@item pixel_aspect
@item pixel_aspect, sar
Specify the sample aspect ratio assumed by the video frames.
@item sws_param
@ -5765,7 +5774,7 @@ input size or format.
For example:
@example
buffer=size=320x240:pix_fmt=yuv410p:time_base=1/24:pixel_aspect=1/1
buffer=width=320:height=240:pix_fmt=yuv410p:time_base=1/24:sar=1
@end example
will instruct the source to accept video frames with size 320x240 and

132
libavfilter/buffersrc.c
Unescape View File

@ -23,6 +23,8 @@
* memory buffer source filter
*/
#include <float.h>
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/fifo.h"
@ -49,6 +51,7 @@ typedef struct {
/* video only */
int w, h;
enum AVPixelFormat pix_fmt;
char *pix_fmt_str;
AVRational pixel_aspect;
char *sws_param;
@ -286,59 +289,15 @@ int av_buffersrc_buffer(AVFilterContext *ctx, AVFilterBufferRef *buf)
}
#endif
#define OFFSET(x) offsetof(BufferSourceContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption buffer_options[] = {
{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
{ "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
{ "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = FLAGS },
{ "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, .flags = FLAGS },
{ "pixel_aspect", NULL, OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
{ "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ NULL },
};
#undef FLAGS
AVFILTER_DEFINE_CLASS(buffer);
static av_cold int init_video(AVFilterContext *ctx, const char *args)
{
BufferSourceContext *c = ctx->priv;
char pix_fmt_str[128], *colon, *equal;
int ret, n = 0;
c->class = &buffer_class;
if (!args) {
av_log(ctx, AV_LOG_ERROR, "Arguments required\n");
if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h || av_q2d(c->time_base) <= 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
return AVERROR(EINVAL);
}
colon = strchr(args, ':');
equal = strchr(args, '=');
if (equal && (!colon || equal < colon)) {
av_opt_set_defaults(c);
ret = av_set_options_string(c, args, "=", ":");
if (ret < 0)
goto fail;
} else {
if (!args ||
(n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
&c->time_base.num, &c->time_base.den,
&c->pixel_aspect.num, &c->pixel_aspect.den)) != 7) {
av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but %d found in '%s'\n", n, args);
return AVERROR(EINVAL);
}
if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == AV_PIX_FMT_NONE) {
char *tail;
c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
if (*tail || c->pix_fmt < 0 || c->pix_fmt >= AV_PIX_FMT_NB) {
av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", pix_fmt_str);
return AVERROR(EINVAL);
}
}
}
if (!(c->fifo = av_fifo_alloc(sizeof(AVFrame*))))
return AVERROR(ENOMEM);
@ -348,10 +307,6 @@ static av_cold int init_video(AVFilterContext *ctx, const char *args)
c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, ""));
c->warning_limit = 100;
return 0;
fail:
av_opt_free(c);
return ret;
}
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
@ -359,13 +314,39 @@ unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
}
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
#define OFFSET(x) offsetof(BufferSourceContext, x)
#define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
#define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption buffer_options[] = {
{ "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V },
{ "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, .flags = V },
#if FF_API_OLD_FILTER_OPTS
/* those 4 are for compatibility with the old option passing system where each filter
* did its own parsing */
{ "time_base_num", "deprecated, do not use", OFFSET(time_base.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "time_base_den", "deprecated, do not use", OFFSET(time_base.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "sar_num", "deprecated, do not use", OFFSET(pixel_aspect.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "sar_den", "deprecated, do not use", OFFSET(pixel_aspect.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
#endif
{ "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V },
{ "pixel_aspect", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V },
{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
{ "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
{ "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = V },
{ NULL },
};
AVFILTER_DEFINE_CLASS(buffer);
static const AVOption abuffer_options[] = {
{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
{ "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
{ "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
{ "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = A },
{ "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
{ "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
{ NULL },
};
@ -376,18 +357,11 @@ static av_cold int init_audio(AVFilterContext *ctx, const char *args)
BufferSourceContext *s = ctx->priv;
int ret = 0;
s->class = &abuffer_class;
av_opt_set_defaults(s);
if ((ret = av_set_options_string(s, args, "=", ":")) < 0)
goto fail;
s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str);
if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
av_log(ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n",
av_log(ctx, AV_LOG_ERROR, "Invalid sample format %s\n",
s->sample_fmt_str);
ret = AVERROR(EINVAL);
goto fail;
return AVERROR(EINVAL);
}
if (s->channel_layout_str) {
@ -395,10 +369,9 @@ static av_cold int init_audio(AVFilterContext *ctx, const char *args)
/* TODO reindent */
s->channel_layout = av_get_channel_layout(s->channel_layout_str);
if (!s->channel_layout) {
av_log(ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n",
av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
s->channel_layout_str);
ret = AVERROR(EINVAL);
goto fail;
return AVERROR(EINVAL);
}
n = av_get_channel_layout_nb_channels(s->channel_layout);
if (s->channels) {
@ -407,22 +380,18 @@ static av_cold int init_audio(AVFilterContext *ctx, const char *args)
"Mismatching channel count %d and layout '%s' "
"(%d channels)\n",
s->channels, s->channel_layout_str, n);
ret = AVERROR(EINVAL);
goto fail;
return AVERROR(EINVAL);
}
}
s->channels = n;
} else if (!s->channels) {
av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
"channel layout specified\n");
ret = AVERROR(EINVAL);
goto fail;
return AVERROR(EINVAL);
}
if (!(s->fifo = av_fifo_alloc(sizeof(AVFrame*)))) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (!(s->fifo = av_fifo_alloc(sizeof(AVFrame*))))
return AVERROR(ENOMEM);
if (!s->time_base.num)
s->time_base = (AVRational){1, s->sample_rate};
@ -433,8 +402,6 @@ static av_cold int init_audio(AVFilterContext *ctx, const char *args)
s->sample_rate, s->channel_layout_str);
s->warning_limit = 100;
fail:
av_opt_free(s);
return ret;
}
@ -448,7 +415,6 @@ static av_cold void uninit(AVFilterContext *ctx)
}
av_fifo_free(s->fifo);
s->fifo = NULL;
av_freep(&s->sws_param);
}
static int query_formats(AVFilterContext *ctx)
@ -541,6 +507,9 @@ static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
{ NULL }
};
static const char *const buffer_shorthand[] = { "width", "height", "pix_fmt",
"time_base_num", "time_base_den", "sar_num", "sar_den", NULL };
AVFilter avfilter_vsrc_buffer = {
.name = "buffer",
.description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
@ -553,6 +522,7 @@ AVFilter avfilter_vsrc_buffer = {
.inputs = NULL,
.outputs = avfilter_vsrc_buffer_outputs,
.priv_class = &buffer_class,
.shorthand = buffer_shorthand,
};
static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
@ -566,6 +536,9 @@ static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
{ NULL }
};
static const char *const abuffer_shorthand[] = { "time_base", "sample_rate",
"sample_fmt", "channel_layout", NULL };
AVFilter avfilter_asrc_abuffer = {
.name = "abuffer",
.description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
@ -578,4 +551,5 @@ AVFilter avfilter_asrc_abuffer = {
.inputs = NULL,
.outputs = avfilter_asrc_abuffer_outputs,
.priv_class = &abuffer_class,
.shorthand = abuffer_shorthand,
};

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