vdpau: Add MPEG-4 decoding via hwaccel infrastructure

Signed-off-by: Diego Biurrun <diego@biurrun.de>

1 files changed, 110 insertions, 0 deletions

diff --git a/libavcodec/vdpau_mpeg4.c b/libavcodec/vdpau_mpeg4.c
new file mode 100644
index 0000000000..706e2b689e
--- /dev/null
+++ b/libavcodec/vdpau_mpeg4.c
@@ -0,0 +1,110 @@
+/*
+ * MPEG-4 Part 2 / H.263 decode acceleration through VDPAU
+ *
+ * Copyright (c) 2008 NVIDIA
+ * Copyright (c) 2013 Rémi Denis-Courmont
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <vdpau/vdpau.h>
+
+#include "avcodec.h"
+#include "vdpau.h"
+#include "vdpau_internal.h"
+
+static int vdpau_mpeg4_start_frame(AVCodecContext *avctx,
+                                   const uint8_t *buffer, uint32_t size)
+{
+    MpegEncContext * const s = avctx->priv_data;
+    AVVDPAUContext *hwctx    = avctx->hwaccel_context;
+    VdpPictureInfoMPEG4Part2 *info = &hwctx->info.mpeg4;
+    VdpVideoSurface ref;
+    int i;
+
+    /* fill VdpPictureInfoMPEG4Part2 struct */
+    info->forward_reference  = VDP_INVALID_HANDLE;
+    info->backward_reference = VDP_INVALID_HANDLE;
+    info->vop_coding_type    = 0;
+
+    switch (s->pict_type) {
+    case AV_PICTURE_TYPE_B:
+        ref = ff_vdpau_get_surface_id(&s->next_picture);
+        assert(ref != VDP_INVALID_HANDLE);
+        info->backward_reference = ref;
+        info->vop_coding_type    = 2;
+        /* fall-through */
+    case AV_PICTURE_TYPE_P:
+        ref = ff_vdpau_get_surface_id(&s->last_picture);
+        assert(ref != VDP_INVALID_HANDLE);
+        info->forward_reference  = ref;
+    }
+
+    info->trd[0]                            = s->pp_time;
+    info->trb[0]                            = s->pb_time;
+    info->trd[1]                            = s->pp_field_time >> 1;
+    info->trb[1]                            = s->pb_field_time >> 1;
+    info->vop_time_increment_resolution     = s->avctx->time_base.den;
+    info->vop_fcode_forward                 = s->f_code;
+    info->vop_fcode_backward                = s->b_code;
+    info->resync_marker_disable             = !s->resync_marker;
+    info->interlaced                        = !s->progressive_sequence;
+    info->quant_type                        = s->mpeg_quant;
+    info->quarter_sample                    = s->quarter_sample;
+    info->short_video_header                = avctx->codec->id == AV_CODEC_ID_H263;
+    info->rounding_control                  = s->no_rounding;
+    info->alternate_vertical_scan_flag      = s->alternate_scan;
+    info->top_field_first                   = s->top_field_first;
+    for (i = 0; i < 64; ++i) {
+        info->intra_quantizer_matrix[i]     = s->intra_matrix[i];
+        info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
+    }
+
+    ff_vdpau_common_start_frame(avctx, buffer, size);
+    return ff_vdpau_add_buffer(avctx, buffer, size);
+}
+
+static int vdpau_mpeg4_decode_slice(av_unused AVCodecContext *avctx,
+                                    av_unused const uint8_t *buffer,
+                                    av_unused uint32_t size)
+{
+     return 0;
+}
+
+#if CONFIG_H263_VDPAU_HWACCEL
+AVHWAccel ff_h263_vdpau_hwaccel = {
+    .name           = "h263_vdpau",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_H263,
+    .pix_fmt        = AV_PIX_FMT_VDPAU,
+    .start_frame    = vdpau_mpeg4_start_frame,
+    .end_frame      = ff_vdpau_common_end_frame,
+    .decode_slice   = vdpau_mpeg4_decode_slice,
+};
+#endif
+
+#if CONFIG_MPEG4_VDPAU_HWACCEL
+AVHWAccel ff_mpeg4_vdpau_hwaccel = {
+    .name           = "mpeg4_vdpau",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_MPEG4,
+    .pix_fmt        = AV_PIX_FMT_VDPAU,
+    .start_frame    = vdpau_mpeg4_start_frame,
+    .end_frame      = ff_vdpau_common_end_frame,
+    .decode_slice   = vdpau_mpeg4_decode_slice,
+};
+#endif