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v4l2slh264dec: Factor out bitstream allocation

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No functional changes.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1395>
This commit is contained in:
Nicolas Dufresne 2020-06-29 13:23:12 -04:00
parent 779f331bd4
commit bc1a0323a9
1 changed files with 30 additions and 20 deletions
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48
sys/v4l2codecs/gstv4l2codech264dec.c
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@ -723,6 +723,34 @@ gst_v4l2_codec_h264_dec_new_sequence (GstH264Decoder * decoder,
return TRUE; return TRUE;
} }
static gboolean
gst_v4l2_codec_h264_dec_ensure_bitstream (GstV4l2CodecH264Dec * self)
{
if (self->bitstream)
goto done;
self->bitstream = gst_v4l2_codec_allocator_alloc (self->sink_allocator);
if (!self->bitstream) {
GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT,
("Not enough memory to decode H264 stream."), (NULL));
return FALSE;
}
if (!gst_memory_map (self->bitstream, &self->bitstream_map, GST_MAP_WRITE)) {
GST_ELEMENT_ERROR (self, RESOURCE, WRITE,
("Could not access bitstream memory for writing"), (NULL));
g_clear_pointer (&self->bitstream, gst_memory_unref);
return FALSE;
}
done:
/* We use this field to track how much we have written */
self->bitstream_map.size = 0;
return TRUE;
}
static gboolean static gboolean
gst_v4l2_codec_h264_dec_start_picture (GstH264Decoder * decoder, gst_v4l2_codec_h264_dec_start_picture (GstH264Decoder * decoder,
GstH264Picture * picture, GstH264Slice * slice, GstH264Dpb * dpb) GstH264Picture * picture, GstH264Slice * slice, GstH264Dpb * dpb)
@ -733,26 +761,8 @@ gst_v4l2_codec_h264_dec_start_picture (GstH264Decoder * decoder,
if (!self->sink_allocator) if (!self->sink_allocator)
return FALSE; return FALSE;
/* Ensure we have a bitstream to write into */ if (!gst_v4l2_codec_h264_dec_ensure_bitstream (self))
if (!self->bitstream) {
self->bitstream = gst_v4l2_codec_allocator_alloc (self->sink_allocator);
if (!self->bitstream) {
GST_ELEMENT_ERROR (decoder, RESOURCE, NO_SPACE_LEFT,
("Not enough memory to decode H264 stream."), (NULL));
return FALSE; return FALSE;
}
if (!gst_memory_map (self->bitstream, &self->bitstream_map, GST_MAP_WRITE)) {
GST_ELEMENT_ERROR (decoder, RESOURCE, WRITE,
("Could not access bitstream memory for writing"), (NULL));
g_clear_pointer (&self->bitstream, gst_memory_unref);
return FALSE;
}
}
/* We use this field to track how much we have written */
self->bitstream_map.size = 0;
gst_v4l2_codec_h264_dec_fill_pps (self, slice->header.pps); gst_v4l2_codec_h264_dec_fill_pps (self, slice->header.pps);
gst_v4l2_codec_h264_dec_fill_scaling_matrix (self, slice->header.pps); gst_v4l2_codec_h264_dec_fill_scaling_matrix (self, slice->header.pps);