summaryrefslogtreecommitdiffstats
path: root/libavcodec/libkvazaar.c
blob: efc98f1f65b55a4a5639a31468ab505ac2dc354d (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
/*
 * libkvazaar encoder
 *
 * Copyright (c) 2015 Tampere University of Technology
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <kvazaar.h>
#include <stdint.h>
#include <string.h>

#include "libavutil/attributes.h"
#include "libavutil/dict.h"
#include "libavutil/error.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"

#include "avcodec.h"
#include "internal.h"

typedef struct LibkvazaarContext {
    const AVClass *class;

    const kvz_api *api;
    kvz_encoder *encoder;
    kvz_config *config;

    char *kvz_params;
} LibkvazaarContext;

static av_cold int libkvazaar_init(AVCodecContext *avctx)
{
    LibkvazaarContext *const ctx = avctx->priv_data;
    const kvz_api *const api = ctx->api = kvz_api_get(8);
    kvz_config *cfg = NULL;
    kvz_encoder *enc = NULL;

    if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
        av_log(avctx, AV_LOG_ERROR,
               "Set -strict experimental to use this encoder.\n");
        return AVERROR_EXPERIMENTAL;
    }

    /* Kvazaar requires width and height to be multiples of eight. */
    if (avctx->width % 8 || avctx->height % 8) {
        av_log(avctx, AV_LOG_ERROR,
               "Video dimensions are not a multiple of 8 (%dx%d).\n",
               avctx->width, avctx->height);
        return AVERROR(ENOSYS);
    }

    ctx->config = cfg = api->config_alloc();
    if (!cfg) {
        av_log(avctx, AV_LOG_ERROR,
               "Could not allocate kvazaar config structure.\n");
        return AVERROR(ENOMEM);
    }

    if (!api->config_init(cfg)) {
        av_log(avctx, AV_LOG_ERROR,
               "Could not initialize kvazaar config structure.\n");
        return AVERROR_BUG;
    }

    cfg->width  = avctx->width;
    cfg->height = avctx->height;

    cfg->framerate_num   = avctx->time_base.den;
    cfg->framerate_denom = avctx->time_base.num * avctx->ticks_per_frame;
    cfg->target_bitrate = avctx->bit_rate;
    cfg->vui.sar_width  = avctx->sample_aspect_ratio.num;
    cfg->vui.sar_height = avctx->sample_aspect_ratio.den;

    if (ctx->kvz_params) {
        AVDictionary *dict = NULL;
        if (!av_dict_parse_string(&dict, ctx->kvz_params, "=", ",", 0)) {
            AVDictionaryEntry *entry = NULL;
            while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) {
                if (!api->config_parse(cfg, entry->key, entry->value)) {
                    av_log(avctx, AV_LOG_WARNING, "Invalid option: %s=%s.\n",
                           entry->key, entry->value);
                }
            }
            av_dict_free(&dict);
        }
    }

    ctx->encoder = enc = api->encoder_open(cfg);
    if (!enc) {
        av_log(avctx, AV_LOG_ERROR, "Could not open kvazaar encoder.\n");
        return AVERROR_BUG;
    }

    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
        kvz_data_chunk *data_out = NULL;
        kvz_data_chunk *chunk = NULL;
        uint32_t len_out;
        uint8_t *p;

        if (!api->encoder_headers(enc, &data_out, &len_out))
            return AVERROR(ENOMEM);

        avctx->extradata = p = av_mallocz(len_out + AV_INPUT_BUFFER_PADDING_SIZE);
        if (!p) {
            ctx->api->chunk_free(data_out);
            return AVERROR(ENOMEM);
        }

        avctx->extradata_size = len_out;

        for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
            memcpy(p, chunk->data, chunk->len);
            p += chunk->len;
        }

        ctx->api->chunk_free(data_out);
    }

    return 0;
}

static av_cold int libkvazaar_close(AVCodecContext *avctx)
{
    LibkvazaarContext *ctx = avctx->priv_data;

    if (ctx->api) {
      ctx->api->encoder_close(ctx->encoder);
      ctx->api->config_destroy(ctx->config);
    }

    if (avctx->extradata)
        av_freep(&avctx->extradata);

    return 0;
}

static int libkvazaar_encode(AVCodecContext *avctx,
                             AVPacket *avpkt,
                             const AVFrame *frame,
                             int *got_packet_ptr)
{
    LibkvazaarContext *ctx = avctx->priv_data;
    kvz_picture *input_pic = NULL;
    kvz_picture *recon_pic = NULL;
    kvz_frame_info frame_info;
    kvz_data_chunk *data_out = NULL;
    uint32_t len_out = 0;
    int retval = 0;

    if (frame) {
        if (frame->width != ctx->config->width ||
                frame->height != ctx->config->height) {
            av_log(avctx, AV_LOG_ERROR,
                   "Changing video dimensions during encoding is not supported. "
                   "(changed from %dx%d to %dx%d)\n",
                   ctx->config->width, ctx->config->height,
                   frame->width, frame->height);
            retval = AVERROR_INVALIDDATA;
            goto done;
        }

        if (frame->format != avctx->pix_fmt) {
            av_log(avctx, AV_LOG_ERROR,
                   "Changing pixel format during encoding is not supported. "
                   "(changed from %s to %s)\n",
                   av_get_pix_fmt_name(avctx->pix_fmt),
                   av_get_pix_fmt_name(frame->format));
            retval = AVERROR_INVALIDDATA;
            goto done;
        }

        // Allocate input picture for kvazaar.
        input_pic = ctx->api->picture_alloc(frame->width, frame->height);
        if (!input_pic) {
            av_log(avctx, AV_LOG_ERROR, "Failed to allocate picture.\n");
            retval = AVERROR(ENOMEM);
            goto done;
        }

        // Copy pixels from frame to input_pic.
        {
            int dst_linesizes[4] = {
              frame->width,
              frame->width / 2,
              frame->width / 2,
              0
            };
            av_image_copy(input_pic->data, dst_linesizes,
                          frame->data, frame->linesize,
                          frame->format, frame->width, frame->height);
        }

        input_pic->pts = frame->pts;
    }

    retval = ctx->api->encoder_encode(ctx->encoder,
                                      input_pic,
                                      &data_out, &len_out,
                                      &recon_pic, NULL,
                                      &frame_info);
    if (!retval) {
        av_log(avctx, AV_LOG_ERROR, "Failed to encode frame.\n");
        retval = AVERROR_INVALIDDATA;
        goto done;
    }

    if (data_out) {
        kvz_data_chunk *chunk = NULL;
        uint64_t written = 0;

        retval = ff_alloc_packet(avpkt, len_out);
        if (retval < 0) {
            av_log(avctx, AV_LOG_ERROR, "Failed to allocate output packet.\n");
            goto done;
        }

        for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
            memcpy(avpkt->data + written, chunk->data, chunk->len);
            written += chunk->len;
        }

        avpkt->pts = recon_pic->pts;
        avpkt->dts = recon_pic->dts;
        avpkt->flags = 0;
        // IRAP VCL NAL unit types span the range
        // [BLA_W_LP (16), RSV_IRAP_VCL23 (23)].
        if (frame_info.nal_unit_type >= KVZ_NAL_BLA_W_LP &&
                frame_info.nal_unit_type <= KVZ_NAL_RSV_IRAP_VCL23) {
            avpkt->flags |= AV_PKT_FLAG_KEY;
        }

        *got_packet_ptr = 1;
    }

done:
    ctx->api->picture_free(input_pic);
    ctx->api->picture_free(recon_pic);
    ctx->api->chunk_free(data_out);
    return retval;
}

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

#define OFFSET(x) offsetof(LibkvazaarContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
    { "kvazaar-params", "Set kvazaar parameters as a comma-separated list of key=value pairs.",
        OFFSET(kvz_params), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, VE },

    { NULL },
};

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

static const AVCodecDefault defaults[] = {
    { "b", "0" },
    { NULL },
};

AVCodec ff_libkvazaar_encoder = {
    .name             = "libkvazaar",
    .long_name        = NULL_IF_CONFIG_SMALL("libkvazaar H.265 / HEVC"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_HEVC,
    .capabilities     = AV_CODEC_CAP_DELAY,
    .pix_fmts         = pix_fmts,

    .priv_class       = &class,
    .priv_data_size   = sizeof(LibkvazaarContext),
    .defaults         = defaults,

    .init             = libkvazaar_init,
    .encode2          = libkvazaar_encode,
    .close            = libkvazaar_close,

    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};
OpenPOWER on IntegriCloud