Deprecate avctx.coded_frame
[ffmpeg.git] / libavcodec / vaapi_mpeg2.c
1 /*
2  * MPEG-2 HW decode acceleration through VA API
3  *
4  * Copyright (C) 2008-2009 Splitted-Desktop Systems
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 #include "mpegutils.h"
24 #include "vaapi_internal.h"
25 #include "internal.h"
26
27 /** Reconstruct bitstream f_code */
28 static inline int mpeg2_get_f_code(MpegEncContext *s)
29 {
30     return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
31            (s->mpeg_f_code[1][0] <<  4) |  s->mpeg_f_code[1][1];
32 }
33
34 /** Determine frame start: first field for field picture or frame picture */
35 static inline int mpeg2_get_is_frame_start(MpegEncContext *s)
36 {
37     return s->first_field || s->picture_structure == PICT_FRAME;
38 }
39
40 static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
41 {
42     struct MpegEncContext * const s = avctx->priv_data;
43     struct vaapi_context * const vactx = avctx->hwaccel_context;
44     VAPictureParameterBufferMPEG2 *pic_param;
45     VAIQMatrixBufferMPEG2 *iq_matrix;
46     int i;
47
48     ff_dlog(avctx, "vaapi_mpeg2_start_frame()\n");
49
50     vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG2);
51
52     /* Fill in VAPictureParameterBufferMPEG2 */
53     pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG2));
54     if (!pic_param)
55         return -1;
56     pic_param->horizontal_size                                  = s->width;
57     pic_param->vertical_size                                    = s->height;
58     pic_param->forward_reference_picture                        = VA_INVALID_ID;
59     pic_param->backward_reference_picture                       = VA_INVALID_ID;
60     pic_param->picture_coding_type                              = s->pict_type;
61     pic_param->f_code                                           = mpeg2_get_f_code(s);
62     pic_param->picture_coding_extension.value                   = 0; /* reset all bits */
63     pic_param->picture_coding_extension.bits.intra_dc_precision = s->intra_dc_precision;
64     pic_param->picture_coding_extension.bits.picture_structure  = s->picture_structure;
65     pic_param->picture_coding_extension.bits.top_field_first    = s->top_field_first;
66     pic_param->picture_coding_extension.bits.frame_pred_frame_dct = s->frame_pred_frame_dct;
67     pic_param->picture_coding_extension.bits.concealment_motion_vectors = s->concealment_motion_vectors;
68     pic_param->picture_coding_extension.bits.q_scale_type       = s->q_scale_type;
69     pic_param->picture_coding_extension.bits.intra_vlc_format   = s->intra_vlc_format;
70     pic_param->picture_coding_extension.bits.alternate_scan     = s->alternate_scan;
71     pic_param->picture_coding_extension.bits.repeat_first_field = s->repeat_first_field;
72     pic_param->picture_coding_extension.bits.progressive_frame  = s->progressive_frame;
73     pic_param->picture_coding_extension.bits.is_first_field     = mpeg2_get_is_frame_start(s);
74
75     switch (s->pict_type) {
76     case AV_PICTURE_TYPE_B:
77         pic_param->backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
78         // fall-through
79     case AV_PICTURE_TYPE_P:
80         pic_param->forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
81         break;
82     }
83
84     /* Fill in VAIQMatrixBufferMPEG2 */
85     iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG2));
86     if (!iq_matrix)
87         return -1;
88     iq_matrix->load_intra_quantiser_matrix              = 1;
89     iq_matrix->load_non_intra_quantiser_matrix          = 1;
90     iq_matrix->load_chroma_intra_quantiser_matrix       = 1;
91     iq_matrix->load_chroma_non_intra_quantiser_matrix   = 1;
92
93     for (i = 0; i < 64; i++) {
94         int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
95         iq_matrix->intra_quantiser_matrix[i]            = s->intra_matrix[n];
96         iq_matrix->non_intra_quantiser_matrix[i]        = s->inter_matrix[n];
97         iq_matrix->chroma_intra_quantiser_matrix[i]     = s->chroma_intra_matrix[n];
98         iq_matrix->chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
99     }
100     return 0;
101 }
102
103 static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
104 {
105     MpegEncContext * const s = avctx->priv_data;
106     VASliceParameterBufferMPEG2 *slice_param;
107     GetBitContext gb;
108     uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
109
110     ff_dlog(avctx, "vaapi_mpeg2_decode_slice(): buffer %p, size %d\n", buffer, size);
111
112     /* Determine macroblock_offset */
113     init_get_bits(&gb, buffer, 8 * size);
114     if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
115         return AVERROR_INVALIDDATA;
116     quantiser_scale_code = get_bits(&gb, 5);
117     intra_slice_flag = get_bits1(&gb);
118     if (intra_slice_flag) {
119         skip_bits(&gb, 8);
120         while (get_bits1(&gb) != 0)
121             skip_bits(&gb, 8);
122     }
123     macroblock_offset = get_bits_count(&gb);
124
125     /* Fill in VASliceParameterBufferMPEG2 */
126     slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
127     if (!slice_param)
128         return -1;
129     slice_param->macroblock_offset              = macroblock_offset;
130     slice_param->slice_horizontal_position      = s->mb_x;
131     slice_param->slice_vertical_position        = s->mb_y >> (s->picture_structure != PICT_FRAME);
132     slice_param->quantiser_scale_code           = quantiser_scale_code;
133     slice_param->intra_slice_flag               = intra_slice_flag;
134     return 0;
135 }
136
137 AVHWAccel ff_mpeg2_vaapi_hwaccel = {
138     .name           = "mpeg2_vaapi",
139     .type           = AVMEDIA_TYPE_VIDEO,
140     .id             = AV_CODEC_ID_MPEG2VIDEO,
141     .pix_fmt        = AV_PIX_FMT_VAAPI_VLD,
142     .start_frame    = vaapi_mpeg2_start_frame,
143     .end_frame      = ff_vaapi_mpeg_end_frame,
144     .decode_slice   = vaapi_mpeg2_decode_slice,
145 };