2 * Intel MediaSDK QSV based H.264 / HEVC decoder
4 * copyright (c) 2013 Luca Barbato
5 * copyright (c) 2015 Anton Khirnov
7 * This file is part of Libav.
9 * Libav 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.
14 * Libav 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.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with Libav; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include <mfx/mfxvideo.h>
30 #include "libavutil/common.h"
31 #include "libavutil/fifo.h"
32 #include "libavutil/opt.h"
36 #include "qsv_internal.h"
45 typedef struct QSVH2645Context {
51 // the filter for converting to Annex B
54 AVFifoBuffer *packet_fifo;
56 AVPacket pkt_filtered;
59 static void qsv_clear_buffers(QSVH2645Context *s)
62 while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
63 av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
64 av_packet_unref(&pkt);
69 av_packet_unref(&s->pkt_filtered);
72 static av_cold int qsv_decode_close(AVCodecContext *avctx)
74 QSVH2645Context *s = avctx->priv_data;
76 ff_qsv_decode_close(&s->qsv);
80 av_fifo_free(s->packet_fifo);
85 static av_cold int qsv_decode_init(AVCodecContext *avctx)
87 QSVH2645Context *s = avctx->priv_data;
90 if (avctx->codec_id == AV_CODEC_ID_HEVC && s->load_plugin != LOAD_PLUGIN_NONE) {
91 static const char *uid_hevcenc_sw = "15dd936825ad475ea34e35f3f54217a6";
93 if (s->qsv.load_plugins[0]) {
94 av_log(avctx, AV_LOG_WARNING,
95 "load_plugins is not empty, but load_plugin is not set to 'none'."
96 "The load_plugin value will be ignored.\n");
98 av_freep(&s->qsv.load_plugins);
99 s->qsv.load_plugins = av_strdup(uid_hevcenc_sw);
100 if (!s->qsv.load_plugins)
101 return AVERROR(ENOMEM);
105 s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
106 if (!s->packet_fifo) {
107 ret = AVERROR(ENOMEM);
113 qsv_decode_close(avctx);
117 static int qsv_init_bsf(AVCodecContext *avctx, QSVH2645Context *s)
119 const char *filter_name = avctx->codec_id == AV_CODEC_ID_HEVC ?
120 "hevc_mp4toannexb" : "h264_mp4toannexb";
121 const AVBitStreamFilter *filter;
127 filter = av_bsf_get_by_name(filter_name);
131 ret = av_bsf_alloc(filter, &s->bsf);
135 ret = avcodec_parameters_from_context(s->bsf->par_in, avctx);
139 s->bsf->time_base_in = avctx->time_base;
141 ret = av_bsf_init(s->bsf);
148 static int qsv_decode_frame(AVCodecContext *avctx, void *data,
149 int *got_frame, AVPacket *avpkt)
151 QSVH2645Context *s = avctx->priv_data;
152 AVFrame *frame = data;
155 /* make sure the bitstream filter is initialized */
156 ret = qsv_init_bsf(avctx, s);
160 /* buffer the input packet */
162 AVPacket input_ref = { 0 };
164 if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
165 ret = av_fifo_realloc2(s->packet_fifo,
166 av_fifo_size(s->packet_fifo) + sizeof(input_ref));
171 ret = av_packet_ref(&input_ref, avpkt);
174 av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
177 /* process buffered data */
178 while (!*got_frame) {
179 /* prepare the input data -- convert to Annex B if needed */
180 if (s->pkt_filtered.size <= 0) {
184 if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
185 return avpkt->size ? avpkt->size : ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, avpkt);
187 av_packet_unref(&s->pkt_filtered);
189 av_fifo_generic_read(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
190 ret = av_bsf_send_packet(s->bsf, &input_ref);
192 av_packet_unref(&input_ref);
196 ret = av_bsf_receive_packet(s->bsf, &s->pkt_filtered);
198 av_packet_move_ref(&s->pkt_filtered, &input_ref);
200 av_packet_unref(&input_ref);
203 ret = ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, &s->pkt_filtered);
207 s->pkt_filtered.size -= ret;
208 s->pkt_filtered.data += ret;
214 static void qsv_decode_flush(AVCodecContext *avctx)
216 QSVH2645Context *s = avctx->priv_data;
218 qsv_clear_buffers(s);
219 ff_qsv_decode_flush(avctx, &s->qsv);
222 #define OFFSET(x) offsetof(QSVH2645Context, x)
223 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
225 #if CONFIG_HEVC_QSV_DECODER
226 AVHWAccel ff_hevc_qsv_hwaccel = {
228 .type = AVMEDIA_TYPE_VIDEO,
229 .id = AV_CODEC_ID_HEVC,
230 .pix_fmt = AV_PIX_FMT_QSV,
233 static const AVOption hevc_options[] = {
234 { "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 },
236 { "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_SW, VD, "load_plugin" },
237 { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE }, 0, 0, VD, "load_plugin" },
238 { "hevc_sw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VD, "load_plugin" },
240 { "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
241 OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
245 static const AVClass hevc_class = {
246 .class_name = "hevc_qsv",
247 .item_name = av_default_item_name,
248 .option = hevc_options,
249 .version = LIBAVUTIL_VERSION_INT,
252 AVCodec ff_hevc_qsv_decoder = {
254 .long_name = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
255 .priv_data_size = sizeof(QSVH2645Context),
256 .type = AVMEDIA_TYPE_VIDEO,
257 .id = AV_CODEC_ID_HEVC,
258 .init = qsv_decode_init,
259 .decode = qsv_decode_frame,
260 .flush = qsv_decode_flush,
261 .close = qsv_decode_close,
262 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
263 .priv_class = &hevc_class,
264 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
270 #if CONFIG_H264_QSV_DECODER
271 AVHWAccel ff_h264_qsv_hwaccel = {
273 .type = AVMEDIA_TYPE_VIDEO,
274 .id = AV_CODEC_ID_H264,
275 .pix_fmt = AV_PIX_FMT_QSV,
278 static const AVOption options[] = {
279 { "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 },
283 static const AVClass class = {
284 .class_name = "h264_qsv",
285 .item_name = av_default_item_name,
287 .version = LIBAVUTIL_VERSION_INT,
290 AVCodec ff_h264_qsv_decoder = {
292 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
293 .priv_data_size = sizeof(QSVH2645Context),
294 .type = AVMEDIA_TYPE_VIDEO,
295 .id = AV_CODEC_ID_H264,
296 .init = qsv_decode_init,
297 .decode = qsv_decode_frame,
298 .flush = qsv_decode_flush,
299 .close = qsv_decode_close,
300 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
301 .priv_class = &class,
302 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,