gstreamer/subprojects/gst-plugins-bad/sys/va/gstvampeg2dec.c
Seungha Yang 7c557c2d65 codecs: mpeg2decoder: Use GstFlowReturn everywhere
boolean return value is not sufficient for representing the reason
of error in most cases. For instance, any errors around new_sequence()
would mean negotiation error, not just *ERROR*.
And some subclasses will allocate buffer/memory/surface on new_picture()
but it could be failed because of expected error, likely flushing

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1019>
2021-10-04 20:56:46 +00:00

741 lines
23 KiB
C

/* GStreamer
* Copyright (C) 2020 Intel Corporation
* Author: He Junyan <junyan.he@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the0
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-vampeg2dec
* @title: vampeg2dec
* @short_description: A VA-API based Mpeg2 video decoder
*
* vampeg2dec decodes Mpeg2 bitstreams to VA surfaces using the
* installed and chosen [VA-API](https://01.org/linuxmedia/vaapi)
* driver.
*
* The decoding surfaces can be mapped onto main memory as video
* frames.
*
* ## Example launch line
* ```
* gst-launch-1.0 filesrc location=sample.mpg ! parsebin ! vampeg2dec ! autovideosink
* ```
*
* Since: 1.20
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvampeg2dec.h"
#include "gstvabasedec.h"
GST_DEBUG_CATEGORY_STATIC (gst_va_mpeg2dec_debug);
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT gst_va_mpeg2dec_debug
#else
#define GST_CAT_DEFAULT NULL
#endif
#define GST_VA_MPEG2_DEC(obj) ((GstVaMpeg2Dec *) obj)
#define GST_VA_MPEG2_DEC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), G_TYPE_FROM_INSTANCE (obj), GstVaMpeg2DecClass))
#define GST_VA_MPEG2_DEC_CLASS(klass) ((GstVaMpeg2DecClass *) klass)
typedef struct _GstVaMpeg2Dec GstVaMpeg2Dec;
typedef struct _GstVaMpeg2DecClass GstVaMpeg2DecClass;
struct _GstVaMpeg2DecClass
{
GstVaBaseDecClass parent_class;
};
struct _GstVaMpeg2Dec
{
GstVaBaseDec parent;
gboolean progressive;
gboolean need_negotiation;
GstMpegVideoSequenceHdr seq;
};
/* *INDENT-OFF* */
static const gchar *src_caps_str =
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_VA,
"{ NV12 }") " ;"
GST_VIDEO_CAPS_MAKE ("{ NV12 }");
/* *INDENT-ON* */
static const gchar *sink_caps_str = "video/x-mpeg2";
static gboolean
gst_va_mpeg2_dec_negotiate (GstVideoDecoder * decoder)
{
GstCapsFeatures *capsfeatures = NULL;
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstVaMpeg2Dec *self = GST_VA_MPEG2_DEC (decoder);
GstVideoFormat format = GST_VIDEO_FORMAT_UNKNOWN;
GstMpeg2Decoder *mpeg2dec = GST_MPEG2_DECODER (decoder);
/* Ignore downstream renegotiation request. */
if (!self->need_negotiation)
return TRUE;
self->need_negotiation = FALSE;
if (gst_va_decoder_is_open (base->decoder)
&& !gst_va_decoder_close (base->decoder))
return FALSE;
if (!gst_va_decoder_open (base->decoder, base->profile, base->rt_format))
return FALSE;
if (!gst_va_decoder_set_frame_size (base->decoder, base->width, base->height))
return FALSE;
if (base->output_state)
gst_video_codec_state_unref (base->output_state);
gst_va_base_dec_get_preferred_format_and_caps_features (base, &format,
&capsfeatures);
base->output_state =
gst_video_decoder_set_output_state (decoder, format,
base->width, base->height, mpeg2dec->input_state);
if (!self->progressive)
base->output_state->info.interlace_mode = GST_VIDEO_INTERLACE_MODE_MIXED;
base->output_state->caps = gst_video_info_to_caps (&base->output_state->info);
if (capsfeatures)
gst_caps_set_features_simple (base->output_state->caps, capsfeatures);
GST_INFO_OBJECT (self, "Negotiated caps %" GST_PTR_FORMAT,
base->output_state->caps);
return GST_VIDEO_DECODER_CLASS (GST_VA_BASE_DEC_GET_PARENT_CLASS
(decoder))->negotiate (decoder);
}
static VAProfile
_map_profile (GstMpegVideoProfile profile)
{
VAProfile p = VAProfileNone;
switch (profile) {
case GST_MPEG_VIDEO_PROFILE_SIMPLE:
p = VAProfileMPEG2Simple;
break;
case GST_MPEG_VIDEO_PROFILE_MAIN:
p = VAProfileMPEG2Main;
break;
default:
p = VAProfileNone;
break;
}
return p;
}
static VAProfile
_get_profile (GstVaMpeg2Dec * self, GstMpegVideoProfile profile,
const GstMpegVideoSequenceExt * seq_ext,
const GstMpegVideoSequenceScalableExt * seq_scalable_ext)
{
GstVaBaseDec *base = GST_VA_BASE_DEC (self);
VAProfile hw_profile;
hw_profile = _map_profile (profile);
if (hw_profile == VAProfileNone)
return hw_profile;
/* promote the profile if hw does not support, until we get one */
do {
if (gst_va_decoder_has_profile (base->decoder, hw_profile))
return hw_profile;
/* Otherwise, try to map to a higher profile */
switch (profile) {
case GST_MPEG_VIDEO_PROFILE_SIMPLE:
hw_profile = VAProfileMPEG2Main;
break;
case GST_MPEG_VIDEO_PROFILE_HIGH:
/* Try to map to main profile if no high profile specific bits used */
if (!seq_scalable_ext && (seq_ext && seq_ext->chroma_format == 1)) {
hw_profile = VAProfileMPEG2Main;
break;
}
/* fall-through */
default:
GST_ERROR_OBJECT (self, "profile %d is unsupported.", profile);
hw_profile = VAProfileNone;
break;
}
} while (hw_profile != VAProfileNone);
return hw_profile;
}
static guint
_get_rtformat (GstVaMpeg2Dec * self, GstMpegVideoChromaFormat chroma_format)
{
guint ret = 0;
switch (chroma_format) {
case GST_MPEG_VIDEO_CHROMA_420:
ret = VA_RT_FORMAT_YUV420;
break;
case GST_MPEG_VIDEO_CHROMA_422:
ret = VA_RT_FORMAT_YUV422;
break;
case GST_MPEG_VIDEO_CHROMA_444:
ret = VA_RT_FORMAT_YUV444;
break;
default:
GST_ERROR_OBJECT (self, "Unsupported chroma format: %d ", chroma_format);
break;
}
return ret;
}
static GstFlowReturn
gst_va_mpeg2_dec_new_sequence (GstMpeg2Decoder * decoder,
const GstMpegVideoSequenceHdr * seq,
const GstMpegVideoSequenceExt * seq_ext,
const GstMpegVideoSequenceDisplayExt * seq_display_ext,
const GstMpegVideoSequenceScalableExt * seq_scalable_ext)
{
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstVaMpeg2Dec *self = GST_VA_MPEG2_DEC (decoder);
VAProfile profile;
GstMpegVideoProfile mpeg_profile;
gboolean negotiation_needed = FALSE;
guint rt_format;
gint width, height;
gboolean progressive;
self->seq = *seq;
width = seq->width;
height = seq->height;
if (seq_ext) {
width = (width & 0x0fff) | ((guint32) seq_ext->horiz_size_ext << 12);
height = (height & 0x0fff) | ((guint32) seq_ext->vert_size_ext << 12);
}
mpeg_profile = GST_MPEG_VIDEO_PROFILE_MAIN;
if (seq_ext)
mpeg_profile = seq_ext->profile;
profile = _get_profile (self, mpeg_profile, seq_ext, seq_scalable_ext);
if (profile == VAProfileNone)
return GST_FLOW_NOT_NEGOTIATED;
rt_format = _get_rtformat (self,
seq_ext ? seq_ext->chroma_format : GST_MPEG_VIDEO_CHROMA_420);
if (rt_format == 0)
return GST_FLOW_NOT_NEGOTIATED;
if (!gst_va_decoder_config_is_equal (base->decoder, profile,
rt_format, width, height)) {
base->profile = profile;
base->rt_format = rt_format;
base->width = width;
base->height = height;
negotiation_needed = TRUE;
GST_INFO_OBJECT (self, "Format changed to %s [%x] (%dx%d)",
gst_va_profile_name (profile), rt_format, base->width, base->height);
}
progressive = seq_ext ? seq_ext->progressive : 1;
if (self->progressive != progressive) {
self->progressive = progressive;
negotiation_needed = TRUE;
GST_INFO_OBJECT (self, "Interlaced mode changed to %d", !progressive);
}
base->need_valign = FALSE;
base->min_buffers = 2 + 4; /* max num pic references + scratch surfaces */
if (negotiation_needed) {
self->need_negotiation = TRUE;
if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (self))) {
GST_ERROR_OBJECT (self, "Failed to negotiate with downstream");
return GST_FLOW_NOT_NEGOTIATED;
}
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_va_mpeg2_dec_new_picture (GstMpeg2Decoder * decoder,
GstVideoCodecFrame * frame, GstMpeg2Picture * picture)
{
GstFlowReturn ret;
GstVaMpeg2Dec *self = GST_VA_MPEG2_DEC (decoder);
GstVaDecodePicture *pic;
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstVideoDecoder *vdec = GST_VIDEO_DECODER (decoder);
ret = gst_video_decoder_allocate_output_frame (vdec, frame);
if (ret != GST_FLOW_OK)
goto error;
pic = gst_va_decode_picture_new (base->decoder, frame->output_buffer);
gst_mpeg2_picture_set_user_data (picture, pic,
(GDestroyNotify) gst_va_decode_picture_free);
GST_LOG_OBJECT (self, "New va decode picture %p - %#x", pic,
gst_va_decode_picture_get_surface (pic));
return GST_FLOW_OK;
error:
{
GST_WARNING_OBJECT (self, "Failed to allocated output buffer, return %s",
gst_flow_get_name (ret));
return ret;
}
}
static GstFlowReturn
gst_va_mpeg2_dec_new_field_picture (GstMpeg2Decoder * decoder,
const GstMpeg2Picture * first_field, GstMpeg2Picture * second_field)
{
GstVaDecodePicture *first_pic, *second_pic;
GstVaMpeg2Dec *self = GST_VA_MPEG2_DEC (decoder);
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
first_pic = gst_mpeg2_picture_get_user_data ((GstMpeg2Picture *) first_field);
if (!first_pic)
return GST_FLOW_ERROR;
second_pic = gst_va_decode_picture_new (base->decoder, first_pic->gstbuffer);
gst_mpeg2_picture_set_user_data (second_field, second_pic,
(GDestroyNotify) gst_va_decode_picture_free);
GST_LOG_OBJECT (self, "New va decode picture %p - %#x", second_pic,
gst_va_decode_picture_get_surface (second_pic));
return GST_FLOW_OK;
}
static inline guint32
_pack_f_code (guint8 f_code[2][2])
{
return (((guint32) f_code[0][0] << 12)
| ((guint32) f_code[0][1] << 8)
| ((guint32) f_code[1][0] << 4)
| (f_code[1][1]));
}
static inline void
_copy_quant_matrix (guint8 dst[64], const guint8 src[64])
{
memcpy (dst, src, 64);
}
static gboolean
gst_va_mpeg2_dec_add_quant_matrix (GstMpeg2Decoder * decoder,
GstMpeg2Picture * picture, GstMpeg2Slice * slice)
{
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstVaMpeg2Dec *self = GST_VA_MPEG2_DEC (decoder);
GstMpegVideoQuantMatrixExt *const quant_matrix = slice->quant_matrix;
guint8 *intra_quant_matrix = NULL;
guint8 *non_intra_quant_matrix = NULL;
guint8 *chroma_intra_quant_matrix = NULL;
guint8 *chroma_non_intra_quant_matrix = NULL;
VAIQMatrixBufferMPEG2 iq_matrix = { 0 };
GstVaDecodePicture *va_pic;
intra_quant_matrix = self->seq.intra_quantizer_matrix;
non_intra_quant_matrix = self->seq.non_intra_quantizer_matrix;
if (quant_matrix) {
if (quant_matrix->load_intra_quantiser_matrix)
intra_quant_matrix = quant_matrix->intra_quantiser_matrix;
if (quant_matrix->load_non_intra_quantiser_matrix)
non_intra_quant_matrix = quant_matrix->non_intra_quantiser_matrix;
if (quant_matrix->load_chroma_intra_quantiser_matrix)
chroma_intra_quant_matrix = quant_matrix->chroma_intra_quantiser_matrix;
if (quant_matrix->load_chroma_non_intra_quantiser_matrix)
chroma_non_intra_quant_matrix =
quant_matrix->chroma_non_intra_quantiser_matrix;
}
iq_matrix.load_intra_quantiser_matrix = intra_quant_matrix != NULL;
if (intra_quant_matrix)
_copy_quant_matrix (iq_matrix.intra_quantiser_matrix, intra_quant_matrix);
iq_matrix.load_non_intra_quantiser_matrix = non_intra_quant_matrix != NULL;
if (non_intra_quant_matrix)
_copy_quant_matrix (iq_matrix.non_intra_quantiser_matrix,
non_intra_quant_matrix);
iq_matrix.load_chroma_intra_quantiser_matrix =
chroma_intra_quant_matrix != NULL;
if (chroma_intra_quant_matrix)
_copy_quant_matrix (iq_matrix.chroma_intra_quantiser_matrix,
chroma_intra_quant_matrix);
iq_matrix.load_chroma_non_intra_quantiser_matrix =
chroma_non_intra_quant_matrix != NULL;
if (chroma_non_intra_quant_matrix)
_copy_quant_matrix (iq_matrix.chroma_non_intra_quantiser_matrix,
chroma_non_intra_quant_matrix);
va_pic = gst_mpeg2_picture_get_user_data (picture);
return gst_va_decoder_add_param_buffer (base->decoder, va_pic,
VAIQMatrixBufferType, &iq_matrix, sizeof (iq_matrix));
}
static inline uint32_t
_is_frame_start (GstMpeg2Picture * picture)
{
return (!picture->first_field
|| (picture->structure == GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME))
? 1 : 0;
}
static inline VASurfaceID
_get_surface_id (GstMpeg2Picture * picture)
{
GstVaDecodePicture *va_pic;
if (!picture)
return VA_INVALID_ID;
va_pic = gst_mpeg2_picture_get_user_data (picture);
if (!va_pic)
return VA_INVALID_ID;
return gst_va_decode_picture_get_surface (va_pic);
}
static GstFlowReturn
gst_va_mpeg2_dec_start_picture (GstMpeg2Decoder * decoder,
GstMpeg2Picture * picture, GstMpeg2Slice * slice,
GstMpeg2Picture * prev_picture, GstMpeg2Picture * next_picture)
{
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstVaMpeg2Dec *self = GST_VA_MPEG2_DEC (decoder);
GstVaDecodePicture *va_pic;
VAPictureParameterBufferMPEG2 pic_param;
va_pic = gst_mpeg2_picture_get_user_data (picture);
/* *INDENT-OFF* */
pic_param = (VAPictureParameterBufferMPEG2) {
.horizontal_size = base->width,
.vertical_size = base->height,
.forward_reference_picture = VA_INVALID_ID,
.backward_reference_picture = VA_INVALID_ID,
.picture_coding_type = slice->pic_hdr->pic_type,
.f_code = _pack_f_code (slice->pic_ext->f_code),
.picture_coding_extension.bits = {
.is_first_field = _is_frame_start (picture),
.intra_dc_precision = slice->pic_ext->intra_dc_precision,
.picture_structure = slice->pic_ext->picture_structure,
.top_field_first = slice->pic_ext->top_field_first,
.frame_pred_frame_dct = slice->pic_ext->frame_pred_frame_dct,
.concealment_motion_vectors = slice->pic_ext->concealment_motion_vectors,
.q_scale_type = slice->pic_ext->q_scale_type,
.intra_vlc_format = slice->pic_ext->intra_vlc_format,
.alternate_scan = slice->pic_ext->alternate_scan,
.repeat_first_field = slice->pic_ext->repeat_first_field,
.progressive_frame = slice->pic_ext->progressive_frame,
},
};
/* *INDENT-ON* */
switch (picture->type) {
case GST_MPEG_VIDEO_PICTURE_TYPE_B:{
VASurfaceID surface = _get_surface_id (next_picture);
if (surface == VA_INVALID_ID) {
GST_WARNING_OBJECT (self, "Missing the backward reference picture");
if (GST_VA_DISPLAY_IS_IMPLEMENTATION (base->display, MESA_GALLIUM))
return GST_FLOW_ERROR;
else if (GST_VA_DISPLAY_IS_IMPLEMENTATION (base->display, INTEL_IHD))
surface = gst_va_decode_picture_get_surface (va_pic);
}
pic_param.backward_reference_picture = surface;
}
/* fall-through */
case GST_MPEG_VIDEO_PICTURE_TYPE_P:{
VASurfaceID surface = _get_surface_id (prev_picture);
if (surface == VA_INVALID_ID) {
GST_WARNING_OBJECT (self, "Missing the forward reference picture");
if (GST_VA_DISPLAY_IS_IMPLEMENTATION (base->display, MESA_GALLIUM))
return GST_FLOW_ERROR;
else if (GST_VA_DISPLAY_IS_IMPLEMENTATION (base->display, INTEL_IHD))
surface = gst_va_decode_picture_get_surface (va_pic);
}
pic_param.forward_reference_picture = surface;
}
default:
break;
}
if (!gst_va_decoder_add_param_buffer (base->decoder, va_pic,
VAPictureParameterBufferType, &pic_param, sizeof (pic_param)))
return GST_FLOW_ERROR;
if (!gst_va_mpeg2_dec_add_quant_matrix (decoder, picture, slice))
return GST_FLOW_ERROR;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_va_mpeg2_dec_decode_slice (GstMpeg2Decoder * decoder,
GstMpeg2Picture * picture, GstMpeg2Slice * slice)
{
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstMpegVideoSliceHdr *header = &slice->header;
GstMpegVideoPacket *packet = &slice->packet;
GstVaDecodePicture *va_pic;
VASliceParameterBufferMPEG2 slice_param;
/* The slice data pass to driver should be a full packet
include the start code. The packet->offset return by
gst_mpeg_video_parse does not include the start code
and so we need to wrap back 4 bytes. */
g_assert (packet->offset >= 4);
/* *INDENT-OFF* */
slice_param = (VASliceParameterBufferMPEG2) {
.slice_data_size = packet->size + 4 /* start code */,
.slice_data_offset = 0,
.slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
.macroblock_offset = header->header_size + 32,
.slice_horizontal_position = header->mb_column,
.slice_vertical_position = header->mb_row,
.quantiser_scale_code = header->quantiser_scale_code,
.intra_slice_flag = header->intra_slice,
};
/* *INDENT-ON* */
va_pic = gst_mpeg2_picture_get_user_data (picture);
if (!gst_va_decoder_add_slice_buffer (base->decoder, va_pic,
&slice_param, sizeof (slice_param),
(guint8 *) (packet->data + packet->offset - 4 /* start code */ ),
packet->size + 4 /* start code */ ))
return GST_FLOW_ERROR;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_va_mpeg2_dec_end_picture (GstMpeg2Decoder * decoder,
GstMpeg2Picture * picture)
{
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstVaDecodePicture *va_pic;
GST_LOG_OBJECT (base, "end picture %p, (poc %d)",
picture, picture->pic_order_cnt);
va_pic = gst_mpeg2_picture_get_user_data (picture);
if (!gst_va_decoder_decode (base->decoder, va_pic))
return GST_FLOW_ERROR;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_va_mpeg2_dec_output_picture (GstMpeg2Decoder * decoder,
GstVideoCodecFrame * frame, GstMpeg2Picture * picture)
{
GstVaBaseDec *base = GST_VA_BASE_DEC (decoder);
GstVaMpeg2Dec *self = GST_VA_MPEG2_DEC (decoder);
GST_LOG_OBJECT (self,
"Outputting picture %p (poc %d)", picture, picture->pic_order_cnt);
if (base->copy_frames)
gst_va_base_dec_copy_output_buffer (base, frame);
if (picture->buffer_flags != 0) {
gboolean interlaced =
(picture->buffer_flags & GST_VIDEO_BUFFER_FLAG_INTERLACED) != 0;
gboolean tff = (picture->buffer_flags & GST_VIDEO_BUFFER_FLAG_TFF) != 0;
GST_TRACE_OBJECT (self,
"apply buffer flags 0x%x (interlaced %d, top-field-first %d)",
picture->buffer_flags, interlaced, tff);
GST_BUFFER_FLAG_SET (frame->output_buffer, picture->buffer_flags);
}
gst_mpeg2_picture_unref (picture);
return gst_video_decoder_finish_frame (GST_VIDEO_DECODER (self), frame);
}
static void
gst_va_mpeg2_dec_init (GTypeInstance * instance, gpointer g_class)
{
gst_va_base_dec_init (GST_VA_BASE_DEC (instance), GST_CAT_DEFAULT);
}
static void
gst_va_mpeg2_dec_dispose (GObject * object)
{
gst_va_base_dec_close (GST_VIDEO_DECODER (object));
G_OBJECT_CLASS (GST_VA_BASE_DEC_GET_PARENT_CLASS (object))->dispose (object);
}
static void
gst_va_mpeg2_dec_class_init (gpointer g_class, gpointer class_data)
{
GstCaps *src_doc_caps, *sink_doc_caps;
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstMpeg2DecoderClass *mpeg2decoder_class = GST_MPEG2_DECODER_CLASS (g_class);
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (g_class);
struct CData *cdata = class_data;
gchar *long_name;
if (cdata->description) {
long_name = g_strdup_printf ("VA-API Mpeg2 Decoder in %s",
cdata->description);
} else {
long_name = g_strdup ("VA-API Mpeg2 Decoder");
}
gst_element_class_set_metadata (element_class, long_name,
"Codec/Decoder/Video/Hardware",
"VA-API based Mpeg2 video decoder", "He Junyan <junyan.he@intel.com>");
sink_doc_caps = gst_caps_from_string (sink_caps_str);
src_doc_caps = gst_caps_from_string (src_caps_str);
gst_va_base_dec_class_init (GST_VA_BASE_DEC_CLASS (g_class), MPEG2,
cdata->render_device_path, cdata->sink_caps, cdata->src_caps,
src_doc_caps, sink_doc_caps);
gobject_class->dispose = gst_va_mpeg2_dec_dispose;
decoder_class->negotiate = GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_negotiate);
mpeg2decoder_class->new_sequence =
GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_new_sequence);
mpeg2decoder_class->new_picture =
GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_new_picture);
mpeg2decoder_class->new_field_picture =
GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_new_field_picture);
mpeg2decoder_class->start_picture =
GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_start_picture);
mpeg2decoder_class->decode_slice =
GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_decode_slice);
mpeg2decoder_class->end_picture =
GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_end_picture);
mpeg2decoder_class->output_picture =
GST_DEBUG_FUNCPTR (gst_va_mpeg2_dec_output_picture);
g_free (long_name);
g_free (cdata->description);
g_free (cdata->render_device_path);
gst_caps_unref (cdata->src_caps);
gst_caps_unref (cdata->sink_caps);
g_free (cdata);
}
static gpointer
_register_debug_category (gpointer data)
{
GST_DEBUG_CATEGORY_INIT (gst_va_mpeg2dec_debug, "vampeg2dec", 0,
"VA Mpeg2 decoder");
return NULL;
}
gboolean
gst_va_mpeg2_dec_register (GstPlugin * plugin, GstVaDevice * device,
GstCaps * sink_caps, GstCaps * src_caps, guint rank)
{
static GOnce debug_once = G_ONCE_INIT;
GType type;
GTypeInfo type_info = {
.class_size = sizeof (GstVaMpeg2DecClass),
.class_init = gst_va_mpeg2_dec_class_init,
.instance_size = sizeof (GstVaMpeg2Dec),
.instance_init = gst_va_mpeg2_dec_init,
};
struct CData *cdata;
gboolean ret;
gchar *type_name, *feature_name;
g_return_val_if_fail (GST_IS_PLUGIN (plugin), FALSE);
g_return_val_if_fail (GST_IS_VA_DEVICE (device), FALSE);
g_return_val_if_fail (GST_IS_CAPS (sink_caps), FALSE);
g_return_val_if_fail (GST_IS_CAPS (src_caps), FALSE);
cdata = g_new (struct CData, 1);
cdata->description = NULL;
cdata->render_device_path = g_strdup (device->render_device_path);
cdata->sink_caps = gst_caps_ref (sink_caps);
cdata->src_caps = gst_caps_ref (src_caps);
/* class data will be leaked if the element never gets instantiated */
GST_MINI_OBJECT_FLAG_SET (cdata->sink_caps,
GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
GST_MINI_OBJECT_FLAG_SET (src_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
type_info.class_data = cdata;
type_name = g_strdup ("GstVaMpeg2dec");
feature_name = g_strdup ("vampeg2dec");
/* The first decoder to be registered should use a constant name,
* like vampeg2dec, for any additional decoders, we create unique
* names, using inserting the render device name. */
if (g_type_from_name (type_name)) {
gchar *basename = g_path_get_basename (device->render_device_path);
g_free (type_name);
g_free (feature_name);
type_name = g_strdup_printf ("GstVa%sMpeg2Dec", basename);
feature_name = g_strdup_printf ("va%smpeg2dec", basename);
cdata->description = basename;
/* lower rank for non-first device */
if (rank > 0)
rank--;
}
g_once (&debug_once, _register_debug_category, NULL);
type = g_type_register_static (GST_TYPE_MPEG2_DECODER,
type_name, &type_info, 0);
ret = gst_element_register (plugin, feature_name, rank, type);
g_free (type_name);
g_free (feature_name);
return ret;
}