summaryrefslogtreecommitdiff
path: root/libavcodec/libx265.c
blob: 4de504a9fe18e29d9fd45ac88ab7887adc9f8751 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
/*
 * libx265 encoder
 *
 * Copyright (c) 2013-2014 Derek Buitenhuis
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <x265.h>

#include "libavutil/internal.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "internal.h"

#if defined(_MSC_VER)
#define X265_API_IMPORTS 1
#endif

typedef struct libx265Context {
    const AVClass *class;

    x265_encoder *encoder;
    x265_param   *params;

    char *preset;
    char *tune;
    char *x265_opts;
} libx265Context;

static int is_keyframe(NalUnitType naltype)
{
    switch (naltype) {
    case NAL_UNIT_CODED_SLICE_BLA_W_LP:
    case NAL_UNIT_CODED_SLICE_BLA_W_RADL:
    case NAL_UNIT_CODED_SLICE_BLA_N_LP:
    case NAL_UNIT_CODED_SLICE_IDR_W_RADL:
    case NAL_UNIT_CODED_SLICE_IDR_N_LP:
    case NAL_UNIT_CODED_SLICE_CRA:
        return 1;
    default:
        return 0;
    }
}

static av_cold int libx265_encode_close(AVCodecContext *avctx)
{
    libx265Context *ctx = avctx->priv_data;

    av_frame_free(&avctx->coded_frame);

    x265_param_free(ctx->params);

    if (ctx->encoder)
        x265_encoder_close(ctx->encoder);

    return 0;
}

static av_cold int libx265_encode_init(AVCodecContext *avctx)
{
    libx265Context *ctx = avctx->priv_data;
    x265_nal *nal;
    char sar[12];
    int sar_num, sar_den;
    int nnal;

    if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL &&
        !av_pix_fmt_desc_get(avctx->pix_fmt)->log2_chroma_w &&
        !av_pix_fmt_desc_get(avctx->pix_fmt)->log2_chroma_h) {
        av_log(avctx, AV_LOG_ERROR,
               "4:4:4 support is not fully defined for HEVC yet. "
               "Set -strict experimental to encode anyway.\n");
        return AVERROR(ENOSYS);
    }

    avctx->coded_frame = av_frame_alloc();
    if (!avctx->coded_frame) {
        av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
        return AVERROR(ENOMEM);
    }

    ctx->params = x265_param_alloc();
    if (!ctx->params) {
        av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n");
        return AVERROR(ENOMEM);
    }

    if (x265_param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) {
        av_log(avctx, AV_LOG_ERROR, "Invalid preset or tune.\n");
        return AVERROR(EINVAL);
    }

    ctx->params->frameNumThreads = avctx->thread_count;
    ctx->params->fpsNum          = avctx->time_base.den;
    ctx->params->fpsDenom        = avctx->time_base.num * avctx->ticks_per_frame;
    ctx->params->sourceWidth     = avctx->width;
    ctx->params->sourceHeight    = avctx->height;

    if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
        av_reduce(&sar_num, &sar_den,
                  avctx->sample_aspect_ratio.num,
                  avctx->sample_aspect_ratio.den, 65535);
        snprintf(sar, sizeof(sar), "%d:%d", sar_num, sar_den);
        if (x265_param_parse(ctx->params, "sar", sar) == X265_PARAM_BAD_VALUE) {
            av_log(avctx, AV_LOG_ERROR, "Invalid SAR: %d:%d.\n", sar_num, sar_den);
            return AVERROR_INVALIDDATA;
        }
    }

    if (x265_max_bit_depth == 8)
        ctx->params->internalBitDepth = 8;
    else if (x265_max_bit_depth == 12)
        ctx->params->internalBitDepth = 10;

    switch (avctx->pix_fmt) {
    case AV_PIX_FMT_YUV420P:
    case AV_PIX_FMT_YUV420P10:
        ctx->params->internalCsp = X265_CSP_I420;
        break;
    case AV_PIX_FMT_YUV444P:
    case AV_PIX_FMT_YUV444P10:
        ctx->params->internalCsp = X265_CSP_I444;
        break;
    }

    if (avctx->bit_rate > 0) {
        ctx->params->rc.bitrate         = avctx->bit_rate / 1000;
        ctx->params->rc.rateControlMode = X265_RC_ABR;
    }

    if (!(avctx->flags & CODEC_FLAG_GLOBAL_HEADER))
        ctx->params->bRepeatHeaders = 1;

    if (ctx->x265_opts) {
        AVDictionary *dict    = NULL;
        AVDictionaryEntry *en = NULL;

        if (!av_dict_parse_string(&dict, ctx->x265_opts, "=", ":", 0)) {
            while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
                int parse_ret = x265_param_parse(ctx->params, en->key, en->value);

                switch (parse_ret) {
                case X265_PARAM_BAD_NAME:
                    av_log(avctx, AV_LOG_WARNING,
                          "Unknown option: %s.\n", en->key);
                    break;
                case X265_PARAM_BAD_VALUE:
                    av_log(avctx, AV_LOG_WARNING,
                          "Invalid value for %s: %s.\n", en->key, en->value);
                    break;
                default:
                    break;
                }
            }
            av_dict_free(&dict);
        }
    }

    ctx->encoder = x265_encoder_open(ctx->params);
    if (!ctx->encoder) {
        av_log(avctx, AV_LOG_ERROR, "Cannot open libx265 encoder.\n");
        libx265_encode_close(avctx);
        return AVERROR_INVALIDDATA;
    }

    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
        avctx->extradata_size = x265_encoder_headers(ctx->encoder, &nal, &nnal);
        if (avctx->extradata_size <= 0) {
            av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n");
            libx265_encode_close(avctx);
            return AVERROR_INVALIDDATA;
        }

        avctx->extradata = av_malloc(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
        if (!avctx->extradata) {
            av_log(avctx, AV_LOG_ERROR,
                   "Cannot allocate HEVC header of size %d.\n", avctx->extradata_size);
            libx265_encode_close(avctx);
            return AVERROR(ENOMEM);
        }

        memcpy(avctx->extradata, nal[0].payload, avctx->extradata_size);
    }

    return 0;
}

static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                const AVFrame *pic, int *got_packet)
{
    libx265Context *ctx = avctx->priv_data;
    x265_picture x265pic;
    x265_picture x265pic_out = { { 0 } };
    x265_nal *nal;
    uint8_t *dst;
    int payload = 0;
    int nnal;
    int ret;
    int i;

    x265_picture_init(ctx->params, &x265pic);

    if (pic) {
        for (i = 0; i < 3; i++) {
           x265pic.planes[i] = pic->data[i];
           x265pic.stride[i] = pic->linesize[i];
        }

        x265pic.pts      = pic->pts;
        x265pic.bitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1;
    }

    ret = x265_encoder_encode(ctx->encoder, &nal, &nnal,
                              pic ? &x265pic : NULL, &x265pic_out);
    if (ret < 0)
        return AVERROR_EXTERNAL;

    if (!nnal)
        return 0;

    for (i = 0; i < nnal; i++)
        payload += nal[i].sizeBytes;

    ret = ff_alloc_packet(pkt, payload);
    if (ret < 0) {
        av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
        return ret;
    }
    dst = pkt->data;

    for (i = 0; i < nnal; i++) {
        memcpy(dst, nal[i].payload, nal[i].sizeBytes);
        dst += nal[i].sizeBytes;

        if (is_keyframe(nal[i].type))
            pkt->flags |= AV_PKT_FLAG_KEY;
    }

    pkt->pts = x265pic_out.pts;
    pkt->dts = x265pic_out.dts;

    *got_packet = 1;
    return 0;
}

static const enum AVPixelFormat x265_csp_eight[] = {
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_NONE
};

static const enum AVPixelFormat x265_csp_twelve[] = {
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_YUV420P10,
    AV_PIX_FMT_YUV444P10,
    AV_PIX_FMT_NONE
};

static av_cold void libx265_encode_init_csp(AVCodec *codec)
{
    if (x265_max_bit_depth == 8)
        codec->pix_fmts = x265_csp_eight;
    else if (x265_max_bit_depth == 12)
        codec->pix_fmts = x265_csp_twelve;
}

#define OFFSET(x) offsetof(libx265Context, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
    { "preset",      "set the x265 preset",                                                         OFFSET(preset),    AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
    { "tune",        "set the x265 tune parameter",                                                 OFFSET(tune),      AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
    { "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 },
    { NULL }
};

static const AVClass class = {
    .class_name = "libx265",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

AVCodec ff_libx265_encoder = {
    .name             = "libx265",
    .long_name        = NULL_IF_CONFIG_SMALL("libx265 H.265 / HEVC"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_HEVC,
    .init             = libx265_encode_init,
    .init_static_data = libx265_encode_init_csp,
    .encode2          = libx265_encode_frame,
    .close            = libx265_encode_close,
    .priv_data_size   = sizeof(libx265Context),
    .priv_class       = &class,
    .capabilities     = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
};