[FFmpeg-devel] [PATCH] lavfi: implement avfilter_get_audio_buffer_ref_from_arrays()
Stefano Sabatini
stefano.sabatini-lala at poste.it
Thu Jun 9 10:37:41 CEST 2011
---
libavfilter/avfilter.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
libavfilter/avfilter.h | 18 ++++++++++++++++++
2 files changed, 62 insertions(+), 0 deletions(-)
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 6d55350..acab816 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -421,6 +421,50 @@ AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
return ret;
}
+AVFilterBufferRef *
+avfilter_get_audio_buffer_ref_from_arrays(uint8_t *data[8], int linesize[8], int perms,
+ int nb_samples, enum AVSampleFormat sample_fmt,
+ int64_t channel_layout, int planar)
+{
+ AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
+ AVFilterBufferRef *samplesref = av_mallocz(sizeof(AVFilterBufferRef));
+
+ if (!samples || !samplesref)
+ goto fail;
+
+ samplesref->buf = samples;
+ samplesref->buf->free = ff_avfilter_default_free_buffer;
+ if (!(samplesref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps))))
+ goto fail;
+
+ samplesref->audio->nb_samples = nb_samples;
+ samplesref->audio->channel_layout = channel_layout;
+ samplesref->audio->planar = planar;
+
+ /* 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, sizeof(samples->data));
+ memcpy(samples->linesize, linesize, sizeof(samples->linesize));
+ memcpy(samplesref->data, data, sizeof(samplesref->data));
+ memcpy(samplesref->linesize, linesize, sizeof(samplesref->linesize));
+
+ return samplesref;
+
+fail:
+ if (samplesref) {
+ if (samplesref->audio)
+ av_free(samplesref->audio);
+ av_free(samplesref);
+ }
+ if (samples) av_free(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 ac954ca..8edf42f 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -695,6 +695,24 @@ AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
int64_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 planar audio data layout - planar or packed
+ * @param channel_layout the channel layout of the buffer, <=0 if unknown
+ * @param nb_channels the number of channels, <= 0 if unknown
+ */
+AVFilterBufferRef *
+avfilter_get_audio_buffer_ref_from_arrays(uint8_t *data[8], int linesize[8], int perms,
+ int nb_samples, enum AVSampleFormat sample_fmt,
+ int64_t channel_layout, int planar);
+
+/**
* Request an input frame from the filter at the other end of the link.
*
* @param link the input link
--
1.7.2.5
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