libx265: Reduce the scope of some variables
[libav.git] / libavcodec / libx265.c
1 /*
2 * libx265 encoder
3 *
4 * Copyright (c) 2013-2014 Derek Buitenhuis
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 #if defined(_MSC_VER)
24 #define X265_API_IMPORTS 1
25 #endif
26
27 #include <x265.h>
28
29 #include "libavutil/internal.h"
30 #include "libavutil/common.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
33 #include "avcodec.h"
34 #include "internal.h"
35
36 typedef struct libx265Context {
37 const AVClass *class;
38
39 x265_encoder *encoder;
40 x265_param *params;
41
42 char *preset;
43 char *tune;
44 char *x265_opts;
45 } libx265Context;
46
47 static int is_keyframe(NalUnitType naltype)
48 {
49 switch (naltype) {
50 case NAL_UNIT_CODED_SLICE_BLA_W_LP:
51 case NAL_UNIT_CODED_SLICE_BLA_W_RADL:
52 case NAL_UNIT_CODED_SLICE_BLA_N_LP:
53 case NAL_UNIT_CODED_SLICE_IDR_W_RADL:
54 case NAL_UNIT_CODED_SLICE_IDR_N_LP:
55 case NAL_UNIT_CODED_SLICE_CRA:
56 return 1;
57 default:
58 return 0;
59 }
60 }
61
62 static av_cold int libx265_encode_close(AVCodecContext *avctx)
63 {
64 libx265Context *ctx = avctx->priv_data;
65
66 av_frame_free(&avctx->coded_frame);
67
68 x265_param_free(ctx->params);
69
70 if (ctx->encoder)
71 x265_encoder_close(ctx->encoder);
72
73 return 0;
74 }
75
76 static av_cold int libx265_encode_init(AVCodecContext *avctx)
77 {
78 libx265Context *ctx = avctx->priv_data;
79
80 if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL &&
81 !av_pix_fmt_desc_get(avctx->pix_fmt)->log2_chroma_w) {
82 av_log(avctx, AV_LOG_ERROR,
83 "4:2:2 and 4:4:4 support is not fully defined for HEVC yet. "
84 "Set -strict experimental to encode anyway.\n");
85 return AVERROR(ENOSYS);
86 }
87
88 avctx->coded_frame = av_frame_alloc();
89 if (!avctx->coded_frame) {
90 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
91 return AVERROR(ENOMEM);
92 }
93
94 ctx->params = x265_param_alloc();
95 if (!ctx->params) {
96 av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n");
97 return AVERROR(ENOMEM);
98 }
99
100 if (x265_param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) {
101 av_log(avctx, AV_LOG_ERROR, "Invalid preset or tune.\n");
102 return AVERROR(EINVAL);
103 }
104
105 ctx->params->frameNumThreads = avctx->thread_count;
106 ctx->params->fpsNum = avctx->time_base.den;
107 ctx->params->fpsDenom = avctx->time_base.num * avctx->ticks_per_frame;
108 ctx->params->sourceWidth = avctx->width;
109 ctx->params->sourceHeight = avctx->height;
110 ctx->params->bEnablePsnr = !!(avctx->flags & CODEC_FLAG_PSNR);
111
112 if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
113 char sar[12];
114 int sar_num, sar_den;
115
116 av_reduce(&sar_num, &sar_den,
117 avctx->sample_aspect_ratio.num,
118 avctx->sample_aspect_ratio.den, 65535);
119 snprintf(sar, sizeof(sar), "%d:%d", sar_num, sar_den);
120 if (x265_param_parse(ctx->params, "sar", sar) == X265_PARAM_BAD_VALUE) {
121 av_log(avctx, AV_LOG_ERROR, "Invalid SAR: %d:%d.\n", sar_num, sar_den);
122 return AVERROR_INVALIDDATA;
123 }
124 }
125
126 switch (avctx->pix_fmt) {
127 case AV_PIX_FMT_YUV420P:
128 case AV_PIX_FMT_YUV420P10:
129 ctx->params->internalCsp = X265_CSP_I420;
130 break;
131 case AV_PIX_FMT_YUV422P:
132 case AV_PIX_FMT_YUV422P10:
133 ctx->params->internalCsp = X265_CSP_I422;
134 break;
135 case AV_PIX_FMT_YUV444P:
136 case AV_PIX_FMT_YUV444P10:
137 ctx->params->internalCsp = X265_CSP_I444;
138 break;
139 }
140
141 if (avctx->bit_rate > 0) {
142 ctx->params->rc.bitrate = avctx->bit_rate / 1000;
143 ctx->params->rc.rateControlMode = X265_RC_ABR;
144 }
145
146 if (!(avctx->flags & CODEC_FLAG_GLOBAL_HEADER))
147 ctx->params->bRepeatHeaders = 1;
148
149 if (ctx->x265_opts) {
150 AVDictionary *dict = NULL;
151 AVDictionaryEntry *en = NULL;
152
153 if (!av_dict_parse_string(&dict, ctx->x265_opts, "=", ":", 0)) {
154 while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
155 int parse_ret = x265_param_parse(ctx->params, en->key, en->value);
156
157 switch (parse_ret) {
158 case X265_PARAM_BAD_NAME:
159 av_log(avctx, AV_LOG_WARNING,
160 "Unknown option: %s.\n", en->key);
161 break;
162 case X265_PARAM_BAD_VALUE:
163 av_log(avctx, AV_LOG_WARNING,
164 "Invalid value for %s: %s.\n", en->key, en->value);
165 break;
166 default:
167 break;
168 }
169 }
170 av_dict_free(&dict);
171 }
172 }
173
174 ctx->encoder = x265_encoder_open(ctx->params);
175 if (!ctx->encoder) {
176 av_log(avctx, AV_LOG_ERROR, "Cannot open libx265 encoder.\n");
177 libx265_encode_close(avctx);
178 return AVERROR_INVALIDDATA;
179 }
180
181 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
182 x265_nal *nal;
183 int nnal;
184
185 avctx->extradata_size = x265_encoder_headers(ctx->encoder, &nal, &nnal);
186 if (avctx->extradata_size <= 0) {
187 av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n");
188 libx265_encode_close(avctx);
189 return AVERROR_INVALIDDATA;
190 }
191
192 avctx->extradata = av_malloc(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
193 if (!avctx->extradata) {
194 av_log(avctx, AV_LOG_ERROR,
195 "Cannot allocate HEVC header of size %d.\n", avctx->extradata_size);
196 libx265_encode_close(avctx);
197 return AVERROR(ENOMEM);
198 }
199
200 memcpy(avctx->extradata, nal[0].payload, avctx->extradata_size);
201 }
202
203 return 0;
204 }
205
206 static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
207 const AVFrame *pic, int *got_packet)
208 {
209 libx265Context *ctx = avctx->priv_data;
210 x265_picture x265pic;
211 x265_picture x265pic_out = { { 0 } };
212 x265_nal *nal;
213 uint8_t *dst;
214 int payload = 0;
215 int nnal;
216 int ret;
217 int i;
218
219 x265_picture_init(ctx->params, &x265pic);
220
221 if (pic) {
222 for (i = 0; i < 3; i++) {
223 x265pic.planes[i] = pic->data[i];
224 x265pic.stride[i] = pic->linesize[i];
225 }
226
227 x265pic.pts = pic->pts;
228 x265pic.bitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1;
229
230 x265pic.sliceType = pic->pict_type == AV_PICTURE_TYPE_I ? X265_TYPE_I :
231 pic->pict_type == AV_PICTURE_TYPE_P ? X265_TYPE_P :
232 pic->pict_type == AV_PICTURE_TYPE_B ? X265_TYPE_B :
233 X265_TYPE_AUTO;
234 }
235
236 ret = x265_encoder_encode(ctx->encoder, &nal, &nnal,
237 pic ? &x265pic : NULL, &x265pic_out);
238 if (ret < 0)
239 return AVERROR_UNKNOWN;
240
241 if (!nnal)
242 return 0;
243
244 for (i = 0; i < nnal; i++)
245 payload += nal[i].sizeBytes;
246
247 ret = ff_alloc_packet(pkt, payload);
248 if (ret < 0) {
249 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
250 return ret;
251 }
252 dst = pkt->data;
253
254 for (i = 0; i < nnal; i++) {
255 memcpy(dst, nal[i].payload, nal[i].sizeBytes);
256 dst += nal[i].sizeBytes;
257
258 if (is_keyframe(nal[i].type))
259 pkt->flags |= AV_PKT_FLAG_KEY;
260 }
261
262 pkt->pts = x265pic_out.pts;
263 pkt->dts = x265pic_out.dts;
264
265 *got_packet = 1;
266 return 0;
267 }
268
269 static const enum AVPixelFormat x265_csp_eight[] = {
270 AV_PIX_FMT_YUV420P,
271 AV_PIX_FMT_YUV422P,
272 AV_PIX_FMT_YUV444P,
273 AV_PIX_FMT_NONE
274 };
275
276 static const enum AVPixelFormat x265_csp_twelve[] = {
277 AV_PIX_FMT_YUV420P,
278 AV_PIX_FMT_YUV422P,
279 AV_PIX_FMT_YUV444P,
280 AV_PIX_FMT_YUV420P10,
281 AV_PIX_FMT_YUV422P10,
282 AV_PIX_FMT_YUV444P10,
283 AV_PIX_FMT_NONE
284 };
285
286 static av_cold void libx265_encode_init_csp(AVCodec *codec)
287 {
288 if (x265_max_bit_depth == 8)
289 codec->pix_fmts = x265_csp_eight;
290 else if (x265_max_bit_depth == 12)
291 codec->pix_fmts = x265_csp_twelve;
292 }
293
294 #define OFFSET(x) offsetof(libx265Context, x)
295 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
296 static const AVOption options[] = {
297 { "preset", "set the x265 preset", OFFSET(preset), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
298 { "tune", "set the x265 tune parameter", OFFSET(tune), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
299 { "x265-params", "set the x265 configuration using a :-separated list of key=value parameters", OFFSET(x265_opts), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
300 { NULL }
301 };
302
303 static const AVClass class = {
304 .class_name = "libx265",
305 .item_name = av_default_item_name,
306 .option = options,
307 .version = LIBAVUTIL_VERSION_INT,
308 };
309
310 static const AVCodecDefault x265_defaults[] = {
311 { "b", "0" },
312 { NULL },
313 };
314
315 AVCodec ff_libx265_encoder = {
316 .name = "libx265",
317 .long_name = NULL_IF_CONFIG_SMALL("libx265 H.265 / HEVC"),
318 .type = AVMEDIA_TYPE_VIDEO,
319 .id = AV_CODEC_ID_HEVC,
320 .init = libx265_encode_init,
321 .init_static_data = libx265_encode_init_csp,
322 .encode2 = libx265_encode_frame,
323 .close = libx265_encode_close,
324 .priv_data_size = sizeof(libx265Context),
325 .priv_class = &class,
326 .defaults = x265_defaults,
327 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
328 };