Add VDPAU hardware accelerated decoding for MPEG-4 ASP which can be used

by video players.

Original patch by NVIDIA corporation.

Originally committed as revision 20502 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 50 insertions, 0 deletions

diff --git a/libavcodec/vdpau.c b/libavcodec/vdpau.c
index 4a7c86c0a8..7cc8ad1ca7 100644
--- a/libavcodec/vdpau.c
+++ b/libavcodec/vdpau.c
@@ -305,4 +305,54 @@ void ff_vdpau_vc1_decode_picture(MpegEncContext *s, const uint8_t *buf,
     render->bitstream_buffers_used        = 0;
 }
 
+void ff_vdpau_mpeg4_decode_picture(MpegEncContext *s, const uint8_t *buf,
+                                   int buf_size)
+{
+    struct vdpau_render_state *render, *last, *next;
+    int i;
+
+    if (!s->current_picture_ptr) return;
+
+    render = (struct vdpau_render_state *)s->current_picture_ptr->data[0];
+    assert(render);
+
+    /* fill VdpPictureInfoMPEG4Part2 struct */
+    render->info.mpeg4.vop_time_increment_resolution     = s->avctx->time_base.den;
+    render->info.mpeg4.vop_coding_type                   = 0;
+    render->info.mpeg4.vop_fcode_forward                 = s->f_code;
+    render->info.mpeg4.vop_fcode_backward                = s->b_code;
+    render->info.mpeg4.resync_marker_disable             = !s->resync_marker;
+    render->info.mpeg4.interlaced                        = !s->progressive_sequence;
+    render->info.mpeg4.quant_type                        = s->mpeg_quant;
+    render->info.mpeg4.quarter_sample                    = s->quarter_sample;
+    render->info.mpeg4.short_video_header                = s->avctx->codec->id == CODEC_ID_H263;
+    render->info.mpeg4.rounding_control                  = s->no_rounding;
+    render->info.mpeg4.alternate_vertical_scan_flag      = s->alternate_scan;
+    render->info.mpeg4.top_field_first                   = s->top_field_first;
+    for (i = 0; i < 64; ++i) {
+        render->info.mpeg4.intra_quantizer_matrix[i]     = s->intra_matrix[i];
+        render->info.mpeg4.non_intra_quantizer_matrix[i] = s->inter_matrix[i];
+    }
+    render->info.mpeg4.forward_reference                 = VDP_INVALID_HANDLE;
+    render->info.mpeg4.backward_reference                = VDP_INVALID_HANDLE;
+
+    switch (s->pict_type) {
+    case FF_B_TYPE:
+        next = (struct vdpau_render_state *)s->next_picture.data[0];
+        assert(next);
+        render->info.mpeg4.backward_reference     = next->surface;
+        render->info.mpeg4.vop_coding_type        = 2;
+        // no break here, going to set forward prediction
+    case FF_P_TYPE:
+        last = (struct vdpau_render_state *)s->last_picture.data[0];
+        assert(last);
+        render->info.mpeg4.forward_reference      = last->surface;
+    }
+
+    ff_vdpau_add_data_chunk(s, buf, buf_size);
+
+    ff_draw_horiz_band(s, 0, s->avctx->height);
+    render->bitstream_buffers_used = 0;
+}
+
 /* @}*/