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lavfi/buffersrc: accept unknown channel layouts.

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This commit is contained in:
Nicolas George 2012-12-26 16:50:57 +01:00
parent 19506af788
commit ea645e90a1
2 changed files with 31 additions and 1 deletions
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5
doc/filters.texi
View File

@ -1060,6 +1060,11 @@ Either a channel layout name from channel_layout_map in
@file{libavutil/channel_layout.c} or its corresponding integer representation
from the AV_CH_LAYOUT_* macros in @file{libavutil/channel_layout.h}
@item channels
The number of channels of the incoming audio buffers.
If both @var{channels} and @var{channel_layout} are specified, then they
must be consistent.
@end table
For example:

27
libavfilter/buffersrc.c
View File

@ -55,6 +55,7 @@ typedef struct {
int sample_rate;
enum AVSampleFormat sample_fmt;
char *sample_fmt_str;
int channels;
uint64_t channel_layout;
char *channel_layout_str;
@ -240,6 +241,7 @@ 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 },
{ NULL },
};
@ -265,6 +267,9 @@ static av_cold int init_audio(AVFilterContext *ctx, const char *args)
goto fail;
}
if (s->channel_layout_str) {
int n;
/* 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",
@ -272,6 +277,24 @@ static av_cold int init_audio(AVFilterContext *ctx, const char *args)
ret = AVERROR(EINVAL);
goto fail;
}
n = av_get_channel_layout_nb_channels(s->channel_layout);
if (s->channels) {
if (n != s->channels) {
av_log(ctx, AV_LOG_ERROR,
"Mismatching channel count %d and layout '%s' "
"(%d channels)\n",
s->channels, s->channel_layout_str, n);
ret = AVERROR(EINVAL);
goto fail;
}
}
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;
}
if (!(s->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) {
ret = AVERROR(ENOMEM);
@ -324,7 +347,9 @@ static int query_formats(AVFilterContext *ctx)
ff_add_format(&samplerates, c->sample_rate);
ff_set_common_samplerates(ctx, samplerates);
ff_add_channel_layout(&channel_layouts, c->channel_layout);
ff_add_channel_layout(&channel_layouts,
c->channel_layout ? c->channel_layout :
FF_COUNT2LAYOUT(c->channels));
ff_set_common_channel_layouts(ctx, channel_layouts);
break;
default: