FFmpeg
vdpau_mpeg4.c
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1 /*
2  * MPEG-4 Part 2 / H.263 decode acceleration through VDPAU
3  *
4  * Copyright (c) 2008 NVIDIA
5  * Copyright (c) 2013 Rémi Denis-Courmont
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software Foundation,
21  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include <vdpau/vdpau.h>
25 
26 #include "avcodec.h"
27 #include "hwaccel.h"
28 #include "mpeg4video.h"
29 #include "vdpau.h"
30 #include "vdpau_internal.h"
31 
33  const uint8_t *buffer, uint32_t size)
34 {
35  Mpeg4DecContext *ctx = avctx->priv_data;
36  MpegEncContext * const s = &ctx->m;
37  Picture *pic = s->current_picture_ptr;
38  struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
39  VdpPictureInfoMPEG4Part2 *info = &pic_ctx->info.mpeg4;
40  VdpVideoSurface ref;
41  int i;
42 
43  /* fill VdpPictureInfoMPEG4Part2 struct */
44  info->forward_reference = VDP_INVALID_HANDLE;
45  info->backward_reference = VDP_INVALID_HANDLE;
46  info->vop_coding_type = 0;
47 
48  switch (s->pict_type) {
49  case AV_PICTURE_TYPE_B:
51  assert(ref != VDP_INVALID_HANDLE);
52  info->backward_reference = ref;
53  info->vop_coding_type = 2;
54  /* fall-through */
55  case AV_PICTURE_TYPE_P:
57  assert(ref != VDP_INVALID_HANDLE);
58  info->forward_reference = ref;
59  }
60 
61  info->trd[0] = s->pp_time;
62  info->trb[0] = s->pb_time;
63  info->trd[1] = s->pp_field_time >> 1;
64  info->trb[1] = s->pb_field_time >> 1;
65  info->vop_time_increment_resolution = s->avctx->framerate.num;
66  info->vop_fcode_forward = s->f_code;
67  info->vop_fcode_backward = s->b_code;
68  info->resync_marker_disable = !ctx->resync_marker;
69  info->interlaced = !s->progressive_sequence;
70  info->quant_type = s->mpeg_quant;
71  info->quarter_sample = s->quarter_sample;
72  info->short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
73  info->rounding_control = s->no_rounding;
74  info->alternate_vertical_scan_flag = s->alternate_scan;
75  info->top_field_first = s->top_field_first;
76  for (i = 0; i < 64; ++i) {
77  info->intra_quantizer_matrix[i] = s->intra_matrix[i];
78  info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
79  }
80 
81  ff_vdpau_common_start_frame(pic_ctx, buffer, size);
82  return ff_vdpau_add_buffer(pic_ctx, buffer, size);
83 }
84 
86  av_unused const uint8_t *buffer,
87  av_unused uint32_t size)
88 {
89  return 0;
90 }
91 
92 static int vdpau_mpeg4_init(AVCodecContext *avctx)
93 {
94  VdpDecoderProfile profile;
95 
96  switch (avctx->profile) {
98  profile = VDP_DECODER_PROFILE_MPEG4_PART2_SP;
99  break;
100  // As any ASP decoder must be able to decode SP, this
101  // should be a safe fallback if profile is unknown/unspecified.
102  case FF_PROFILE_UNKNOWN:
104  profile = VDP_DECODER_PROFILE_MPEG4_PART2_ASP;
105  break;
106  default:
107  return AVERROR(ENOTSUP);
108  }
109 
110  return ff_vdpau_common_init(avctx, profile, avctx->level);
111 }
112 
114  .name = "mpeg4_vdpau",
115  .type = AVMEDIA_TYPE_VIDEO,
116  .id = AV_CODEC_ID_MPEG4,
117  .pix_fmt = AV_PIX_FMT_VDPAU,
118  .start_frame = vdpau_mpeg4_start_frame,
119  .end_frame = ff_vdpau_mpeg_end_frame,
120  .decode_slice = vdpau_mpeg4_decode_slice,
121  .frame_priv_data_size = sizeof(struct vdpau_picture_context),
122  .init = vdpau_mpeg4_init,
123  .uninit = ff_vdpau_common_uninit,
124  .frame_params = ff_vdpau_common_frame_params,
125  .priv_data_size = sizeof(VDPAUContext),
126  .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
127 };
#define FF_PROFILE_MPEG4_SIMPLE
Definition: avcodec.h:2963
const struct AVCodec * codec
Definition: avcodec.h:1579
AVRational framerate
Definition: avcodec.h:3110
int resync_marker
could this stream contain resync markers
Definition: mpeg4video.h:91
int ff_vdpau_common_start_frame(struct vdpau_picture_context *pic_ctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
Definition: vdpau.c:322
int num
Numerator.
Definition: rational.h:59
Public libavcodec VDPAU header.
int profile
profile
Definition: avcodec.h:2903
int ff_vdpau_common_uninit(AVCodecContext *avctx)
Definition: vdpau.c:284
uint8_t
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
uint16_t pp_time
time distance between the last 2 p,s,i frames
Definition: mpegvideo.h:392
ptrdiff_t size
Definition: opengl_enc.c:100
MpegEncContext m
Definition: mpeg4video.h:75
enum AVCodecID id
Definition: avcodec.h:3508
int ff_vdpau_common_init(AVCodecContext *avctx, VdpDecoderProfile profile, int level)
Definition: vdpau.c:133
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
VdpPictureInfoMPEG4Part2 mpeg4
int quarter_sample
1->qpel, 0->half pel ME/MC
Definition: mpegvideo.h:401
static int vdpau_mpeg4_decode_slice(av_unused AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
Definition: vdpau_mpeg4.c:85
MIPS optimizations info
Definition: mips.txt:2
int top_field_first
Definition: mpegvideo.h:466
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:3668
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:2904
Picture.
Definition: mpegpicture.h:45
int alternate_scan
Definition: mpegvideo.h:471
void * hwaccel_picture_private
Hardware accelerator private data.
Definition: mpegpicture.h:77
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
int level
level
Definition: avcodec.h:3023
int ff_vdpau_common_frame_params(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx)
Definition: vdpau.c:114
static int vdpau_mpeg4_init(AVCodecContext *avctx)
Definition: vdpau_mpeg4.c:92
uint16_t inter_matrix[64]
Definition: mpegvideo.h:302
Libavcodec external API header.
int ff_vdpau_mpeg_end_frame(AVCodecContext *avctx)
main external API structure.
Definition: avcodec.h:1570
#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE
Definition: avcodec.h:2978
int progressive_sequence
Definition: mpegvideo.h:456
struct AVFrame * f
Definition: mpegpicture.h:46
HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface.
Definition: pixfmt.h:197
int f_code
forward MV resolution
Definition: mpegvideo.h:238
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
mfxU16 profile
Definition: qsvenc.c:44
uint16_t pb_field_time
like above, just for interlaced
Definition: mpegvideo.h:395
MpegEncContext.
Definition: mpegvideo.h:81
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
uint16_t pp_field_time
Definition: mpegvideo.h:394
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
int ff_vdpau_add_buffer(struct vdpau_picture_context *pic_ctx, const uint8_t *buf, uint32_t size)
Definition: vdpau.c:377
Picture last_picture
copy of the previous picture structure.
Definition: mpegvideo.h:162
Bi-dir predicted.
Definition: avutil.h:276
#define HWACCEL_CAP_ASYNC_SAFE
Definition: hwaccel.h:26
void * priv_data
Definition: avcodec.h:1597
static int vdpau_mpeg4_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: vdpau_mpeg4.c:32
union VDPAUPictureInfo info
VDPAU picture information.
Picture next_picture
copy of the next picture structure.
Definition: mpegvideo.h:168
const AVHWAccel ff_mpeg4_vdpau_hwaccel
Definition: vdpau_mpeg4.c:113
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:300
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int b_code
backward MV resolution for B-frames (MPEG-4)
Definition: mpegvideo.h:239
Predicted.
Definition: avutil.h:275
GLuint buffer
Definition: opengl_enc.c:101
#define av_unused
Definition: attributes.h:125
uint16_t pb_time
time distance between the last b and p,s,i frame
Definition: mpegvideo.h:393
static uintptr_t ff_vdpau_get_surface_id(AVFrame *pic)
Extract VdpVideoSurface from an AVFrame.