From: Stefano Sabatini <stefano.sabatini-l...@poste.it>
Signed-off-by: Anton Khirnov <an...@khirnov.net>
---
libavfilter/avfilter.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++
libavfilter/avfilter.h | 16 ++++++++++++
2 files changed, 83 insertions(+)
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 5973e6b..a14669a 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -385,6 +385,73 @@ AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink
*link, int perms,
return ret;
}
+AVFilterBufferRef*
+avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data, int linesize, int
perms,
+ int nb_samples, enum AVSampleFormat
sample_fmt,
+ uint64_t channel_layout)
+{
+ int planes;
+ AVFilterBuffer *samples = av_mallocz(sizeof(*samples));
+ AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref));
+
+ if (!samples || !samplesref)
+ goto fail;
+
+ samplesref->buf = samples;
+ samplesref->buf->free = ff_avfilter_default_free_buffer;
+ if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio))))
+ goto fail;
+
+ samplesref->audio->nb_samples = nb_samples;
+ samplesref->audio->channel_layout = channel_layout;
+ samplesref->audio->planar = av_sample_fmt_is_planar(sample_fmt);
+
+ planes = samplesref->audio->planar ?
av_get_channel_layout_nb_channels(channel_layout) : 1;
+
+ /* make sure the buffer gets read permission or it's useless for output */
+ samplesref->perms = perms | AV_PERM_READ;
+
+ samples->refcount = 1;
+ samplesref->type = AVMEDIA_TYPE_AUDIO;
+ samplesref->format = sample_fmt;
+
+ memcpy(samples->data, data,
+ FFMIN(FF_ARRAY_ELEMS(samples->data),
planes)*sizeof(samples->data[0]));
+ memcpy(samplesref->data, samples->data, sizeof(samples->data));
+
+ samples->linesize[0] = samplesref->linesize[0] = linesize;
+
+ if (planes > FF_ARRAY_ELEMS(samples->data)) {
+ samples-> extended_data = av_mallocz(sizeof(*samples->extended_data)
*
+ planes);
+ samplesref->extended_data =
av_mallocz(sizeof(*samplesref->extended_data) *
+ planes);
+
+ if (!samples->extended_data || !samplesref->extended_data)
+ goto fail;
+
+ memcpy(samples-> extended_data, data, sizeof(*data)*planes);
+ memcpy(samplesref->extended_data, data, sizeof(*data)*planes);
+ } else {
+ samples->extended_data = samples->data;
+ samplesref->extended_data = samplesref->data;
+ }
+
+ return samplesref;
+
+fail:
+ if (samples && samples->extended_data != samples->data)
+ av_freep(&samples->extended_data);
+ if (samplesref) {
+ av_freep(&samplesref->audio);
+ if (samplesref->extended_data != samplesref->data)
+ av_freep(&samplesref->extended_data);
+ }
+ av_freep(&samplesref);
+ av_freep(&samples);
+ return NULL;
+}
+
int avfilter_request_frame(AVFilterLink *link)
{
FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 8965094..5f5284a 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -701,6 +701,22 @@ AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink
*link, int perms,
uint64_t channel_layout, int
planar);
/**
+ * Create an audio buffer reference wrapped around an already
+ * allocated samples buffer.
+ *
+ * @param data pointers to the samples plane buffers
+ * @param linesize linesize for the samples plane buffers
+ * @param perms the required access permissions
+ * @param nb_samples number of samples per channel
+ * @param sample_fmt the format of each sample in the buffer to allocate
+ * @param channel_layout the channel layout of the buffer
+ */
+AVFilterBufferRef *
+avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data, int linesize, int
perms,
+ int nb_samples, enum AVSampleFormat
sample_fmt,
+ uint64_t channel_layout);
+
+/**
* Request an input frame from the filter at the other end of the link.
*
* @param link the input link
--
1.7.9.5
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