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videodecoder: Add support for subclasses to configure the buffer pool

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This commit is contained in:
Sebastian Dröge 2012-04-24 22:35:29 +02:00
parent 8571293311
commit 1483997207
2 changed files with 47 additions and 14 deletions
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53
gst-libs/gst/video/gstvideodecoder.c
View file

@ -283,6 +283,8 @@ static gboolean gst_video_decoder_sink_event_default (GstVideoDecoder * decoder,
GstEvent * event);
static gboolean gst_video_decoder_src_event_default (GstVideoDecoder * decoder,
GstEvent * event);
static gboolean gst_video_decoder_configure_buffer_pool_default (GstVideoDecoder
* decoder, GstQuery * query, GstBufferPool * pool);
/* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
* method to get to the padtemplates */
@ -334,6 +336,8 @@ gst_video_decoder_class_init (GstVideoDecoderClass * klass)
klass->sink_event = gst_video_decoder_sink_event_default;
klass->src_event = gst_video_decoder_src_event_default;
klass->configure_buffer_pool =
gst_video_decoder_configure_buffer_pool_default;
}
static void
@ -1947,7 +1951,8 @@ gst_video_decoder_finish_frame (GstVideoDecoder * decoder,
GST_LOG_OBJECT (decoder, "finish frame");
if (G_UNLIKELY (priv->output_state_changed))
if (G_UNLIKELY (priv->output_state_changed || (priv->output_state
&& gst_pad_check_reconfigure (decoder->srcpad))))
gst_video_decoder_set_src_caps (decoder);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
@ -2375,6 +2380,25 @@ gst_video_decoder_get_frame (GstVideoDecoder * decoder, int frame_number)
return frame;
}
static gboolean
gst_video_decoder_configure_buffer_pool_default (GstVideoDecoder * decoder,
GstQuery * query, GstBufferPool * pool)
{
GstStructure *config;
if (gst_query_has_allocation_meta (query, GST_VIDEO_META_API_TYPE)) {
config = gst_buffer_pool_get_config (pool);
/* just set the option, if the pool can support it we will transparently use
* it through the video info API. We could also see if the pool support this
* option and only activate it then. */
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_buffer_pool_set_config (pool, config);
}
return TRUE;
}
/**
* gst_video_decoder_set_src_caps:
* @decoder: a #GstVideoDecoder
@ -2389,6 +2413,7 @@ static gboolean
gst_video_decoder_set_src_caps (GstVideoDecoder * decoder)
{
GstVideoCodecState *state = decoder->priv->output_state;
GstVideoDecoderClass *klass;
GstQuery *query;
GstBufferPool *pool;
GstStructure *config;
@ -2400,6 +2425,8 @@ gst_video_decoder_set_src_caps (GstVideoDecoder * decoder)
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
GST_DEBUG_OBJECT (decoder, "output_state par %d/%d fps %d/%d",
state->info.par_n, state->info.par_d,
state->info.fps_n, state->info.fps_d);
@ -2442,18 +2469,14 @@ gst_video_decoder_set_src_caps (GstVideoDecoder * decoder)
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, state->caps, size, min, max);
if (gst_query_has_allocation_meta (query, GST_VIDEO_META_API_TYPE)) {
/* just set the option, if the pool can support it we will transparently use
* it through the video info API. We could also see if the pool support this
* option and only activate it then. */
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_set_config (pool, config);
if (klass->configure_buffer_pool)
ret = klass->configure_buffer_pool (decoder, query, pool);
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
if (ret)
gst_buffer_pool_set_active (pool, TRUE);
gst_query_unref (query);
@ -2482,7 +2505,9 @@ gst_video_decoder_alloc_output_buffer (GstVideoDecoder * decoder)
GST_DEBUG ("alloc src buffer");
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (G_UNLIKELY (decoder->priv->output_state_changed))
if (G_UNLIKELY (decoder->priv->output_state_changed
|| (decoder->priv->output_state
&& gst_pad_check_reconfigure (decoder->srcpad))))
gst_video_decoder_set_src_caps (decoder);
gst_buffer_pool_acquire_buffer (decoder->priv->pool, &buffer, NULL);
@ -2516,7 +2541,9 @@ gst_video_decoder_alloc_output_frame (GstVideoDecoder *
g_return_val_if_fail (num_bytes != 0, GST_FLOW_ERROR);
if (G_UNLIKELY (decoder->priv->output_state_changed))
if (G_UNLIKELY (decoder->priv->output_state_changed
|| (decoder->priv->output_state
&& gst_pad_check_reconfigure (decoder->srcpad))))
gst_video_decoder_set_src_caps (decoder);
GST_LOG_OBJECT (decoder, "alloc buffer size %d", num_bytes);

8
gst-libs/gst/video/gstvideodecoder.h
View file

@ -247,7 +247,11 @@ struct _GstVideoDecoder
* Event handler on the source pad. This function should return
* TRUE if the event was handled and should be discarded
* (i.e. not unref'ed).
*
* @configure_buffer_pool: Optional.
* Configure the buffer that is used for allocation of output
* buffers. The passed query contains the result of the allocation
* query. The default implementation will add the VIDEO_META if
* supported by the buffer pool.
* Subclasses can override any of the available virtual methods or not, as
* needed. At minimum @handle_frame needs to be overridden, and @set_format
* and likely as well. If non-packetized input is supported or expected,
@ -291,6 +295,8 @@ struct _GstVideoDecoderClass
gboolean (*src_event) (GstVideoDecoder *decoder,
GstEvent *event);
gboolean (*configure_buffer_pool) (GstVideoDecoder *decoder, GstQuery *query, GstBufferPool *pool);
/*< private >*/
/* FIXME before moving to base */