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path: root/libavcodec/qsvenc_hevc.c (plain)
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1/*
2 * Intel MediaSDK QSV based HEVC encoder
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21
22#include <stdint.h>
23#include <sys/types.h>
24
25#include <mfx/mfxvideo.h>
26
27#include "libavutil/common.h"
28#include "libavutil/opt.h"
29
30#include "avcodec.h"
31#include "bytestream.h"
32#include "get_bits.h"
33#include "hevc.h"
34#include "hevcdec.h"
35#include "h2645_parse.h"
36#include "internal.h"
37#include "qsv.h"
38#include "qsv_internal.h"
39#include "qsvenc.h"
40
41enum LoadPlugin {
42 LOAD_PLUGIN_NONE,
43 LOAD_PLUGIN_HEVC_SW,
44 LOAD_PLUGIN_HEVC_HW,
45};
46
47typedef struct QSVHEVCEncContext {
48 AVClass *class;
49 QSVEncContext qsv;
50 int load_plugin;
51} QSVHEVCEncContext;
52
53static int generate_fake_vps(QSVEncContext *q, AVCodecContext *avctx)
54{
55 GetByteContext gbc;
56 PutByteContext pbc;
57
58 GetBitContext gb;
59 H2645NAL sps_nal = { NULL };
60 HEVCSPS sps = { 0 };
61 HEVCVPS vps = { 0 };
62 uint8_t vps_buf[128], vps_rbsp_buf[128];
63 uint8_t *new_extradata;
64 unsigned int sps_id;
65 int ret, i, type, vps_size;
66
67 if (!avctx->extradata_size) {
68 av_log(avctx, AV_LOG_ERROR, "No extradata returned from libmfx\n");
69 return AVERROR_UNKNOWN;
70 }
71
72 /* parse the SPS */
73 ret = ff_h2645_extract_rbsp(avctx->extradata + 4, avctx->extradata_size - 4, &sps_nal, 1);
74 if (ret < 0) {
75 av_log(avctx, AV_LOG_ERROR, "Error unescaping the SPS buffer\n");
76 return ret;
77 }
78
79 ret = init_get_bits8(&gb, sps_nal.data, sps_nal.size);
80 if (ret < 0) {
81 av_freep(&sps_nal.rbsp_buffer);
82 return ret;
83 }
84
85 get_bits(&gb, 1);
86 type = get_bits(&gb, 6);
87 if (type != HEVC_NAL_SPS) {
88 av_log(avctx, AV_LOG_ERROR, "Unexpected NAL type in the extradata: %d\n",
89 type);
90 av_freep(&sps_nal.rbsp_buffer);
91 return AVERROR_INVALIDDATA;
92 }
93 get_bits(&gb, 9);
94
95 ret = ff_hevc_parse_sps(&sps, &gb, &sps_id, 0, NULL, avctx);
96 av_freep(&sps_nal.rbsp_buffer);
97 if (ret < 0) {
98 av_log(avctx, AV_LOG_ERROR, "Error parsing the SPS\n");
99 return ret;
100 }
101
102 /* generate the VPS */
103 vps.vps_max_layers = 1;
104 vps.vps_max_sub_layers = sps.max_sub_layers;
105 memcpy(&vps.ptl, &sps.ptl, sizeof(vps.ptl));
106 vps.vps_sub_layer_ordering_info_present_flag = 1;
107 for (i = 0; i < HEVC_MAX_SUB_LAYERS; i++) {
108 vps.vps_max_dec_pic_buffering[i] = sps.temporal_layer[i].max_dec_pic_buffering;
109 vps.vps_num_reorder_pics[i] = sps.temporal_layer[i].num_reorder_pics;
110 vps.vps_max_latency_increase[i] = sps.temporal_layer[i].max_latency_increase;
111 }
112
113 vps.vps_num_layer_sets = 1;
114 vps.vps_timing_info_present_flag = sps.vui.vui_timing_info_present_flag;
115 vps.vps_num_units_in_tick = sps.vui.vui_num_units_in_tick;
116 vps.vps_time_scale = sps.vui.vui_time_scale;
117 vps.vps_poc_proportional_to_timing_flag = sps.vui.vui_poc_proportional_to_timing_flag;
118 vps.vps_num_ticks_poc_diff_one = sps.vui.vui_num_ticks_poc_diff_one_minus1 + 1;
119
120 /* generate the encoded RBSP form of the VPS */
121 ret = ff_hevc_encode_nal_vps(&vps, sps.vps_id, vps_rbsp_buf, sizeof(vps_rbsp_buf));
122 if (ret < 0) {
123 av_log(avctx, AV_LOG_ERROR, "Error writing the VPS\n");
124 return ret;
125 }
126
127 /* escape and add the startcode */
128 bytestream2_init(&gbc, vps_rbsp_buf, ret);
129 bytestream2_init_writer(&pbc, vps_buf, sizeof(vps_buf));
130
131 bytestream2_put_be32(&pbc, 1); // startcode
132 bytestream2_put_byte(&pbc, HEVC_NAL_VPS << 1); // NAL
133 bytestream2_put_byte(&pbc, 1); // header
134
135 while (bytestream2_get_bytes_left(&gbc)) {
136 uint32_t b = bytestream2_peek_be24(&gbc);
137 if (b <= 3) {
138 bytestream2_put_be24(&pbc, 3);
139 bytestream2_skip(&gbc, 2);
140 } else
141 bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
142 }
143
144 vps_size = bytestream2_tell_p(&pbc);
145 new_extradata = av_mallocz(vps_size + avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
146 if (!new_extradata)
147 return AVERROR(ENOMEM);
148 memcpy(new_extradata, vps_buf, vps_size);
149 memcpy(new_extradata + vps_size, avctx->extradata, avctx->extradata_size);
150
151 av_freep(&avctx->extradata);
152 avctx->extradata = new_extradata;
153 avctx->extradata_size += vps_size;
154
155 return 0;
156}
157
158static av_cold int qsv_enc_init(AVCodecContext *avctx)
159{
160 QSVHEVCEncContext *q = avctx->priv_data;
161 int ret;
162
163 if (q->load_plugin != LOAD_PLUGIN_NONE) {
164 static const char *uid_hevcenc_sw = "2fca99749fdb49aeb121a5b63ef568f7";
165 static const char *uid_hevcenc_hw = "6fadc791a0c2eb479ab6dcd5ea9da347";
166
167 if (q->qsv.load_plugins[0]) {
168 av_log(avctx, AV_LOG_WARNING,
169 "load_plugins is not empty, but load_plugin is not set to 'none'."
170 "The load_plugin value will be ignored.\n");
171 } else {
172 av_freep(&q->qsv.load_plugins);
173
174 if (q->load_plugin == LOAD_PLUGIN_HEVC_SW)
175 q->qsv.load_plugins = av_strdup(uid_hevcenc_sw);
176 else
177 q->qsv.load_plugins = av_strdup(uid_hevcenc_hw);
178
179 if (!q->qsv.load_plugins)
180 return AVERROR(ENOMEM);
181 }
182 }
183
184 ret = ff_qsv_enc_init(avctx, &q->qsv);
185 if (ret < 0)
186 return ret;
187
188 ret = generate_fake_vps(&q->qsv, avctx);
189 if (ret < 0) {
190 ff_qsv_enc_close(avctx, &q->qsv);
191 return ret;
192 }
193
194 return 0;
195}
196
197static int qsv_enc_frame(AVCodecContext *avctx, AVPacket *pkt,
198 const AVFrame *frame, int *got_packet)
199{
200 QSVHEVCEncContext *q = avctx->priv_data;
201
202 return ff_qsv_encode(avctx, &q->qsv, pkt, frame, got_packet);
203}
204
205static av_cold int qsv_enc_close(AVCodecContext *avctx)
206{
207 QSVHEVCEncContext *q = avctx->priv_data;
208
209 return ff_qsv_enc_close(avctx, &q->qsv);
210}
211
212#define OFFSET(x) offsetof(QSVHEVCEncContext, x)
213#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
214static const AVOption options[] = {
215 QSV_COMMON_OPTS
216
217 { "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, VE, "load_plugin" },
218 { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE }, 0, 0, VE, "load_plugin" },
219 { "hevc_sw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VE, "load_plugin" },
220 { "hevc_hw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_HW }, 0, 0, VE, "load_plugin" },
221
222 { "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
223 OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VE },
224
225 { "profile", NULL, OFFSET(qsv.profile), AV_OPT_TYPE_INT, { .i64 = MFX_PROFILE_UNKNOWN }, 0, INT_MAX, VE, "profile" },
226 { "unknown", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_UNKNOWN }, INT_MIN, INT_MAX, VE, "profile" },
227 { "main", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN }, INT_MIN, INT_MAX, VE, "profile" },
228 { "main10", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN10 }, INT_MIN, INT_MAX, VE, "profile" },
229 { "mainsp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAINSP }, INT_MIN, INT_MAX, VE, "profile" },
230
231 { NULL },
232};
233
234static const AVClass class = {
235 .class_name = "hevc_qsv encoder",
236 .item_name = av_default_item_name,
237 .option = options,
238 .version = LIBAVUTIL_VERSION_INT,
239};
240
241static const AVCodecDefault qsv_enc_defaults[] = {
242 { "b", "1M" },
243 { "refs", "0" },
244 // same as the x264 default
245 { "g", "248" },
246 { "bf", "8" },
247
248 { "flags", "+cgop" },
249#if FF_API_PRIVATE_OPT
250 { "b_strategy", "-1" },
251#endif
252 { NULL },
253};
254
255AVCodec ff_hevc_qsv_encoder = {
256 .name = "hevc_qsv",
257 .long_name = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
258 .priv_data_size = sizeof(QSVHEVCEncContext),
259 .type = AVMEDIA_TYPE_VIDEO,
260 .id = AV_CODEC_ID_HEVC,
261 .init = qsv_enc_init,
262 .encode2 = qsv_enc_frame,
263 .close = qsv_enc_close,
264 .capabilities = AV_CODEC_CAP_DELAY,
265 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
266 AV_PIX_FMT_P010,
267 AV_PIX_FMT_QSV,
268 AV_PIX_FMT_NONE },
269 .priv_class = &class,
270 .defaults = qsv_enc_defaults,
271 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
272};
273
generated by cgit at 2024-05-17 03:24:40 (GMT)