static GstFlowReturn
gst_vdp_mpeg_dec_handle_frame (GstBaseVideoDecoder * base_video_decoder,
GstVideoFrame * frame, GstClockTimeDiff deadline)
{
GstVdpMpegDec *mpeg_dec = GST_VDP_MPEG_DEC (base_video_decoder);
VdpPictureInfoMPEG1Or2 *info;
GstVdpMpegFrame *mpeg_frame;
GstFlowReturn ret = GST_FLOW_OK;
VdpBitstreamBuffer vbit[1];
GstVdpVideoBuffer *outbuf;
/* MPEG_PACKET_SEQUENCE */
mpeg_frame = GST_VDP_MPEG_FRAME (frame);
if (mpeg_frame->seq) {
ret = gst_vdp_mpeg_dec_handle_sequence (mpeg_dec, mpeg_frame->seq,
mpeg_frame->seq_ext);
if (ret != GST_FLOW_OK) {
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return ret;
}
}
if (mpeg_dec->state == GST_VDP_MPEG_DEC_STATE_NEED_SEQUENCE) {
GST_DEBUG_OBJECT (mpeg_dec, "Drop frame since we haven't found a "
"MPEG_PACKET_SEQUENCE yet");
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return GST_FLOW_OK;
}
/* MPEG_PACKET_PICTURE */
if (mpeg_frame->pic)
gst_vdp_mpeg_dec_handle_picture (mpeg_dec, mpeg_frame->pic);
/* MPEG_PACKET_EXT_PICTURE_CODING */
if (mpeg_frame->pic_ext)
gst_vdp_mpeg_dec_handle_picture_coding (mpeg_dec, mpeg_frame->pic_ext,
frame);
/* MPEG_PACKET_GOP */
if (mpeg_frame->gop)
gst_vdp_mpeg_dec_handle_gop (mpeg_dec, mpeg_frame->gop);
/* MPEG_PACKET_EXT_QUANT_MATRIX */
if (mpeg_frame->qm_ext)
gst_vdp_mpeg_dec_handle_quant_matrix (mpeg_dec, mpeg_frame->qm_ext);
info = &mpeg_dec->vdp_info;
info->slice_count = mpeg_frame->n_slices;
/* check if we can decode the frame */
if (info->picture_coding_type != I_FRAME
&& info->backward_reference == VDP_INVALID_HANDLE) {
GST_DEBUG_OBJECT (mpeg_dec,
"Drop frame since we haven't got an I_FRAME yet");
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return GST_FLOW_OK;
}
if (info->picture_coding_type == B_FRAME
&& info->forward_reference == VDP_INVALID_HANDLE) {
GST_DEBUG_OBJECT (mpeg_dec,
"Drop frame since we haven't got two non B_FRAMES yet");
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return GST_FLOW_OK;
}
if (info->picture_coding_type != B_FRAME) {
if (info->backward_reference != VDP_INVALID_HANDLE) {
ret = gst_base_video_decoder_finish_frame (base_video_decoder,
mpeg_dec->b_frame);
}
if (info->forward_reference != VDP_INVALID_HANDLE) {
gst_video_frame_unref (mpeg_dec->f_frame);
info->forward_reference = VDP_INVALID_HANDLE;
}
info->forward_reference = info->backward_reference;
mpeg_dec->f_frame = mpeg_dec->b_frame;
info->backward_reference = VDP_INVALID_HANDLE;
}
if (ret != GST_FLOW_OK) {
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return ret;
}
/* decode */
vbit[0].struct_version = VDP_BITSTREAM_BUFFER_VERSION;
vbit[0].bitstream = GST_BUFFER_DATA (mpeg_frame->slices);
vbit[0].bitstream_bytes = GST_BUFFER_SIZE (mpeg_frame->slices);
ret = gst_vdp_decoder_render (GST_VDP_DECODER (mpeg_dec),
(VdpPictureInfo *) info, 1, vbit, &outbuf);
if (ret != GST_FLOW_OK)
return ret;
frame->src_buffer = GST_BUFFER_CAST (outbuf);
if (info->picture_coding_type == B_FRAME) {
ret = gst_base_video_decoder_finish_frame (base_video_decoder, frame);
} else {
info->backward_reference = GST_VDP_VIDEO_BUFFER (outbuf)->surface;
mpeg_dec->b_frame = gst_video_frame_ref (frame);
}
return ret;
}
static GstFlowReturn
gst_vdp_mpeg4_dec_handle_frame (GstBaseVideoDecoder * base_video_decoder,
GstVideoFrame * frame, GstClockTimeDiff deadline)
{
GstVdpMpeg4Dec *mpeg4_dec = GST_VDP_MPEG4_DEC (base_video_decoder);
GstMpeg4Frame *mpeg4_frame;
GstFlowReturn ret;
Mpeg4VideoObjectLayer *vol;
Mpeg4VideoObjectPlane vop;
VdpPictureInfoMPEG4Part2 info;
VdpBitstreamBuffer bufs[1];
GstVdpVideoBuffer *video_buf;
mpeg4_frame = GST_MPEG4_FRAME (frame);
ret = gst_vdp_mpeg4_dec_handle_configuration (mpeg4_dec, mpeg4_frame);
if (ret != GST_FLOW_OK)
return ret;
vol = &mpeg4_dec->vol;
if (!mpeg4_util_parse_VOP (mpeg4_frame->vop_buf, vol, &vop)) {
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return GST_FLOW_CUSTOM_ERROR;
}
/* calculate vop time */
mpeg4_frame->vop_time =
vop.modulo_time_base * vol->vop_time_increment_resolution +
vop.time_increment;
if (mpeg4_dec->tframe == -1 && vop.coding_type == B_VOP)
mpeg4_dec->tframe = mpeg4_frame->vop_time - mpeg4_dec->f_frame->vop_time;
if (vop.coding_type != B_VOP) {
if (mpeg4_dec->b_frame) {
ret = gst_base_video_decoder_finish_frame (base_video_decoder,
GST_VIDEO_FRAME_CAST (mpeg4_dec->b_frame));
if (mpeg4_dec->f_frame)
gst_video_frame_unref (GST_VIDEO_FRAME_CAST (mpeg4_dec->f_frame));
mpeg4_dec->f_frame = mpeg4_dec->b_frame;
mpeg4_dec->b_frame = NULL;
}
}
info = gst_vdp_mpeg4_dec_fill_info (mpeg4_dec, mpeg4_frame, &vop);
bufs[0].struct_version = VDP_BITSTREAM_BUFFER_VERSION;
bufs[0].bitstream = GST_BUFFER_DATA (mpeg4_frame->vop_buf);
bufs[0].bitstream_bytes = GST_BUFFER_SIZE (mpeg4_frame->vop_buf);
ret = gst_vdp_decoder_render (GST_VDP_DECODER (base_video_decoder),
(VdpPictureInfo *) & info, 1, bufs, &video_buf);
if (ret != GST_FLOW_OK) {
gst_base_video_decoder_skip_frame (base_video_decoder, frame);
return ret;
}
frame->src_buffer = GST_BUFFER_CAST (video_buf);
if (vop.coding_type == B_VOP)
ret = gst_base_video_decoder_finish_frame (base_video_decoder, frame);
else {
gst_video_frame_ref (GST_VIDEO_FRAME_CAST (mpeg4_frame));
mpeg4_dec->b_frame = mpeg4_frame;
ret = GST_FLOW_OK;
}
return ret;
}
