53a1bc82549ef70ecda7fce9e5ff6d268af3f8f8
[libav.git] / libavcodec / qsvdec_other.c
1 /*
2 * Intel MediaSDK QSV based MPEG-2 and VC-1 decoders
3 *
4 * copyright (c) 2015 Anton Khirnov
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
24 #include <stdint.h>
25 #include <string.h>
26
27 #include <mfx/mfxvideo.h>
28
29 #include "libavutil/common.h"
30 #include "libavutil/fifo.h"
31 #include "libavutil/opt.h"
32
33 #include "avcodec.h"
34 #include "internal.h"
35 #include "qsv_internal.h"
36 #include "qsvdec.h"
37 #include "qsv.h"
38
39 typedef struct QSVOtherContext {
40 AVClass *class;
41 QSVContext qsv;
42
43 AVFifoBuffer *packet_fifo;
44
45 AVPacket input_ref;
46 } QSVOtherContext;
47
48 static void qsv_clear_buffers(QSVOtherContext *s)
49 {
50 AVPacket pkt;
51 while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
52 av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
53 av_packet_unref(&pkt);
54 }
55
56 av_packet_unref(&s->input_ref);
57 }
58
59 static av_cold int qsv_decode_close(AVCodecContext *avctx)
60 {
61 QSVOtherContext *s = avctx->priv_data;
62
63 ff_qsv_decode_close(&s->qsv);
64
65 qsv_clear_buffers(s);
66
67 av_fifo_free(s->packet_fifo);
68
69 return 0;
70 }
71
72 static av_cold int qsv_decode_init(AVCodecContext *avctx)
73 {
74 QSVOtherContext *s = avctx->priv_data;
75 int ret;
76
77 s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
78 if (!s->packet_fifo) {
79 ret = AVERROR(ENOMEM);
80 goto fail;
81 }
82
83 return 0;
84 fail:
85 qsv_decode_close(avctx);
86 return ret;
87 }
88
89 static int qsv_decode_frame(AVCodecContext *avctx, void *data,
90 int *got_frame, AVPacket *avpkt)
91 {
92 QSVOtherContext *s = avctx->priv_data;
93 AVFrame *frame = data;
94 int ret;
95
96 /* buffer the input packet */
97 if (avpkt->size) {
98 AVPacket input_ref = { 0 };
99
100 if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
101 ret = av_fifo_realloc2(s->packet_fifo,
102 av_fifo_size(s->packet_fifo) + sizeof(input_ref));
103 if (ret < 0)
104 return ret;
105 }
106
107 ret = av_packet_ref(&input_ref, avpkt);
108 if (ret < 0)
109 return ret;
110 av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
111 }
112
113 /* process buffered data */
114 while (!*got_frame) {
115 if (s->input_ref.size <= 0) {
116 /* no more data */
117 if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
118 return avpkt->size ? avpkt->size : ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, avpkt);
119
120 av_packet_unref(&s->input_ref);
121 av_fifo_generic_read(s->packet_fifo, &s->input_ref, sizeof(s->input_ref), NULL);
122 }
123
124 ret = ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, &s->input_ref);
125 if (ret < 0)
126 return ret;
127
128 s->input_ref.size -= ret;
129 s->input_ref.data += ret;
130 }
131
132 return avpkt->size;
133 }
134
135 static void qsv_decode_flush(AVCodecContext *avctx)
136 {
137 QSVOtherContext *s = avctx->priv_data;
138
139 qsv_clear_buffers(s);
140 ff_qsv_decode_flush(avctx, &s->qsv);
141 }
142
143 #define OFFSET(x) offsetof(QSVOtherContext, x)
144 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
145 static const AVOption options[] = {
146 { "async_depth", "Internal parallelization depth, the higher the value the higher the latency.", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VD },
147 { NULL },
148 };
149
150 #if CONFIG_MPEG2_QSV_HWACCEL
151 AVHWAccel ff_mpeg2_qsv_hwaccel = {
152 .name = "mpeg2_qsv",
153 .type = AVMEDIA_TYPE_VIDEO,
154 .id = AV_CODEC_ID_MPEG2VIDEO,
155 .pix_fmt = AV_PIX_FMT_QSV,
156 };
157 #endif
158
159 #if CONFIG_MPEG2_QSV_DECODER
160 static const AVClass mpeg2_qsv_class = {
161 .class_name = "mpeg2_qsv",
162 .item_name = av_default_item_name,
163 .option = options,
164 .version = LIBAVUTIL_VERSION_INT,
165 };
166
167 AVCodec ff_mpeg2_qsv_decoder = {
168 .name = "mpeg2_qsv",
169 .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video (Intel Quick Sync Video acceleration)"),
170 .priv_data_size = sizeof(QSVOtherContext),
171 .type = AVMEDIA_TYPE_VIDEO,
172 .id = AV_CODEC_ID_MPEG2VIDEO,
173 .init = qsv_decode_init,
174 .decode = qsv_decode_frame,
175 .flush = qsv_decode_flush,
176 .close = qsv_decode_close,
177 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
178 .priv_class = &mpeg2_qsv_class,
179 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
180 AV_PIX_FMT_QSV,
181 AV_PIX_FMT_NONE },
182 };
183 #endif
184
185 #if CONFIG_VC1_QSV_HWACCEL
186 AVHWAccel ff_vc1_qsv_hwaccel = {
187 .name = "vc1_qsv",
188 .type = AVMEDIA_TYPE_VIDEO,
189 .id = AV_CODEC_ID_VC1,
190 .pix_fmt = AV_PIX_FMT_QSV,
191 };
192 #endif
193
194 #if CONFIG_VC1_QSV_DECODER
195 static const AVClass vc1_qsv_class = {
196 .class_name = "vc1_qsv",
197 .item_name = av_default_item_name,
198 .option = options,
199 .version = LIBAVUTIL_VERSION_INT,
200 };
201
202 AVCodec ff_vc1_qsv_decoder = {
203 .name = "vc1_qsv",
204 .long_name = NULL_IF_CONFIG_SMALL("VC-1 video (Intel Quick Sync Video acceleration)"),
205 .priv_data_size = sizeof(QSVOtherContext),
206 .type = AVMEDIA_TYPE_VIDEO,
207 .id = AV_CODEC_ID_VC1,
208 .init = qsv_decode_init,
209 .decode = qsv_decode_frame,
210 .flush = qsv_decode_flush,
211 .close = qsv_decode_close,
212 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
213 .priv_class = &vc1_qsv_class,
214 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
215 AV_PIX_FMT_QSV,
216 AV_PIX_FMT_NONE },
217 };
218 #endif