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path: root/libavcodec/qsvdec_h2645.c (plain)
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1/*
2 * Intel MediaSDK QSV based H.264 / HEVC decoder
3 *
4 * copyright (c) 2013 Luca Barbato
5 * copyright (c) 2015 Anton Khirnov
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
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24
25#include <stdint.h>
26#include <string.h>
27
28#include <mfx/mfxvideo.h>
29
30#include "libavutil/common.h"
31#include "libavutil/fifo.h"
32#include "libavutil/opt.h"
33
34#include "avcodec.h"
35#include "internal.h"
36#include "qsv_internal.h"
37#include "qsvdec.h"
38#include "qsv.h"
39
40enum LoadPlugin {
41 LOAD_PLUGIN_NONE,
42 LOAD_PLUGIN_HEVC_SW,
43 LOAD_PLUGIN_HEVC_HW,
44};
45
46typedef struct QSVH2645Context {
47 AVClass *class;
48 QSVContext qsv;
49
50 int load_plugin;
51
52 // the filter for converting to Annex B
53 AVBSFContext *bsf;
54
55 AVFifoBuffer *packet_fifo;
56
57 AVPacket pkt_filtered;
58} QSVH2645Context;
59
60static void qsv_clear_buffers(QSVH2645Context *s)
61{
62 AVPacket pkt;
63 while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
64 av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
65 av_packet_unref(&pkt);
66 }
67
68 av_bsf_free(&s->bsf);
69
70 av_packet_unref(&s->pkt_filtered);
71}
72
73static av_cold int qsv_decode_close(AVCodecContext *avctx)
74{
75 QSVH2645Context *s = avctx->priv_data;
76
77 ff_qsv_decode_close(&s->qsv);
78
79 qsv_clear_buffers(s);
80
81 av_fifo_free(s->packet_fifo);
82
83 return 0;
84}
85
86static av_cold int qsv_decode_init(AVCodecContext *avctx)
87{
88 QSVH2645Context *s = avctx->priv_data;
89 int ret;
90
91 if (avctx->codec_id == AV_CODEC_ID_HEVC && s->load_plugin != LOAD_PLUGIN_NONE) {
92 static const char *uid_hevcdec_sw = "15dd936825ad475ea34e35f3f54217a6";
93 static const char *uid_hevcdec_hw = "33a61c0b4c27454ca8d85dde757c6f8e";
94
95 if (s->qsv.load_plugins[0]) {
96 av_log(avctx, AV_LOG_WARNING,
97 "load_plugins is not empty, but load_plugin is not set to 'none'."
98 "The load_plugin value will be ignored.\n");
99 } else {
100 av_freep(&s->qsv.load_plugins);
101
102 if (s->load_plugin == LOAD_PLUGIN_HEVC_SW)
103 s->qsv.load_plugins = av_strdup(uid_hevcdec_sw);
104 else
105 s->qsv.load_plugins = av_strdup(uid_hevcdec_hw);
106 if (!s->qsv.load_plugins)
107 return AVERROR(ENOMEM);
108 }
109 }
110
111 s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
112 if (!s->packet_fifo) {
113 ret = AVERROR(ENOMEM);
114 goto fail;
115 }
116
117 return 0;
118fail:
119 qsv_decode_close(avctx);
120 return ret;
121}
122
123static int qsv_init_bsf(AVCodecContext *avctx, QSVH2645Context *s)
124{
125 const char *filter_name = avctx->codec_id == AV_CODEC_ID_HEVC ?
126 "hevc_mp4toannexb" : "h264_mp4toannexb";
127 const AVBitStreamFilter *filter;
128 int ret;
129
130 if (s->bsf)
131 return 0;
132
133 filter = av_bsf_get_by_name(filter_name);
134 if (!filter)
135 return AVERROR_BUG;
136
137 ret = av_bsf_alloc(filter, &s->bsf);
138 if (ret < 0)
139 return ret;
140
141 ret = avcodec_parameters_from_context(s->bsf->par_in, avctx);
142 if (ret < 0)
143 return ret;
144
145 s->bsf->time_base_in = avctx->time_base;
146
147 ret = av_bsf_init(s->bsf);
148 if (ret < 0)
149 return ret;
150
151 return ret;
152}
153
154static int qsv_decode_frame(AVCodecContext *avctx, void *data,
155 int *got_frame, AVPacket *avpkt)
156{
157 QSVH2645Context *s = avctx->priv_data;
158 AVFrame *frame = data;
159 int ret;
160
161 /* make sure the bitstream filter is initialized */
162 ret = qsv_init_bsf(avctx, s);
163 if (ret < 0)
164 return ret;
165
166 /* buffer the input packet */
167 if (avpkt->size) {
168 AVPacket input_ref = { 0 };
169
170 if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
171 ret = av_fifo_realloc2(s->packet_fifo,
172 av_fifo_size(s->packet_fifo) + sizeof(input_ref));
173 if (ret < 0)
174 return ret;
175 }
176
177 ret = av_packet_ref(&input_ref, avpkt);
178 if (ret < 0)
179 return ret;
180 av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
181 }
182
183 /* process buffered data */
184 while (!*got_frame) {
185 /* prepare the input data -- convert to Annex B if needed */
186 if (s->pkt_filtered.size <= 0) {
187 AVPacket input_ref;
188
189 /* no more data */
190 if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
191 return avpkt->size ? avpkt->size : ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, avpkt);
192
193 av_packet_unref(&s->pkt_filtered);
194
195 av_fifo_generic_read(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
196 ret = av_bsf_send_packet(s->bsf, &input_ref);
197 if (ret < 0) {
198 av_packet_unref(&input_ref);
199 return ret;
200 }
201
202 ret = av_bsf_receive_packet(s->bsf, &s->pkt_filtered);
203 if (ret < 0)
204 av_packet_move_ref(&s->pkt_filtered, &input_ref);
205 else
206 av_packet_unref(&input_ref);
207 }
208
209 ret = ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, &s->pkt_filtered);
210 if (ret < 0)
211 return ret;
212
213 s->pkt_filtered.size -= ret;
214 s->pkt_filtered.data += ret;
215 }
216
217 return avpkt->size;
218}
219
220static void qsv_decode_flush(AVCodecContext *avctx)
221{
222 QSVH2645Context *s = avctx->priv_data;
223
224 qsv_clear_buffers(s);
225 ff_qsv_decode_flush(avctx, &s->qsv);
226}
227
228#define OFFSET(x) offsetof(QSVH2645Context, x)
229#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
230
231#if CONFIG_HEVC_QSV_DECODER
232AVHWAccel ff_hevc_qsv_hwaccel = {
233 .name = "hevc_qsv",
234 .type = AVMEDIA_TYPE_VIDEO,
235 .id = AV_CODEC_ID_HEVC,
236 .pix_fmt = AV_PIX_FMT_QSV,
237};
238
239static const AVOption hevc_options[] = {
240 { "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 },
241
242 { "load_plugin", "A user plugin to load in an internal session", OFFSET(load_plugin), AV_OPT_TYPE_INT, { .i64 = LOAD_PLUGIN_HEVC_SW }, LOAD_PLUGIN_NONE, LOAD_PLUGIN_HEVC_HW, VD, "load_plugin" },
243 { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE }, 0, 0, VD, "load_plugin" },
244 { "hevc_sw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VD, "load_plugin" },
245 { "hevc_hw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_HW }, 0, 0, VD, "load_plugin" },
246
247 { "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
248 OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
249 { NULL },
250};
251
252static const AVClass hevc_class = {
253 .class_name = "hevc_qsv",
254 .item_name = av_default_item_name,
255 .option = hevc_options,
256 .version = LIBAVUTIL_VERSION_INT,
257};
258
259AVCodec ff_hevc_qsv_decoder = {
260 .name = "hevc_qsv",
261 .long_name = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
262 .priv_data_size = sizeof(QSVH2645Context),
263 .type = AVMEDIA_TYPE_VIDEO,
264 .id = AV_CODEC_ID_HEVC,
265 .init = qsv_decode_init,
266 .decode = qsv_decode_frame,
267 .flush = qsv_decode_flush,
268 .close = qsv_decode_close,
269 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_AVOID_PROBING,
270 .priv_class = &hevc_class,
271 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
272 AV_PIX_FMT_P010,
273 AV_PIX_FMT_QSV,
274 AV_PIX_FMT_NONE },
275};
276#endif
277
278#if CONFIG_H264_QSV_DECODER
279AVHWAccel ff_h264_qsv_hwaccel = {
280 .name = "h264_qsv",
281 .type = AVMEDIA_TYPE_VIDEO,
282 .id = AV_CODEC_ID_H264,
283 .pix_fmt = AV_PIX_FMT_QSV,
284};
285
286static const AVOption options[] = {
287 { "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 },
288 { NULL },
289};
290
291static const AVClass class = {
292 .class_name = "h264_qsv",
293 .item_name = av_default_item_name,
294 .option = options,
295 .version = LIBAVUTIL_VERSION_INT,
296};
297
298AVCodec ff_h264_qsv_decoder = {
299 .name = "h264_qsv",
300 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
301 .priv_data_size = sizeof(QSVH2645Context),
302 .type = AVMEDIA_TYPE_VIDEO,
303 .id = AV_CODEC_ID_H264,
304 .init = qsv_decode_init,
305 .decode = qsv_decode_frame,
306 .flush = qsv_decode_flush,
307 .close = qsv_decode_close,
308 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_AVOID_PROBING,
309 .priv_class = &class,
310 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
311 AV_PIX_FMT_P010,
312 AV_PIX_FMT_QSV,
313 AV_PIX_FMT_NONE },
314};
315#endif
316
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