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path: root/libavcodec/libkvazaar.c (plain)
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1/*
2 * libkvazaar encoder
3 *
4 * Copyright (c) 2015 Tampere University of Technology
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#include <kvazaar.h>
24#include <string.h>
25
26#include "libavutil/avassert.h"
27#include "libavutil/dict.h"
28#include "libavutil/error.h"
29#include "libavutil/imgutils.h"
30#include "libavutil/internal.h"
31#include "libavutil/pixdesc.h"
32#include "libavutil/opt.h"
33
34#include "avcodec.h"
35#include "internal.h"
36
37typedef struct LibkvazaarContext {
38 const AVClass *class;
39
40 const kvz_api *api;
41 kvz_encoder *encoder;
42 kvz_config *config;
43
44 char *kvz_params;
45} LibkvazaarContext;
46
47static av_cold int libkvazaar_init(AVCodecContext *avctx)
48{
49 LibkvazaarContext *const ctx = avctx->priv_data;
50 const kvz_api *const api = ctx->api = kvz_api_get(8);
51 kvz_config *cfg = NULL;
52 kvz_encoder *enc = NULL;
53
54 /* Kvazaar requires width and height to be multiples of eight. */
55 if (avctx->width % 8 || avctx->height % 8) {
56 av_log(avctx, AV_LOG_ERROR,
57 "Video dimensions are not a multiple of 8 (%dx%d).\n",
58 avctx->width, avctx->height);
59 return AVERROR(ENOSYS);
60 }
61
62 ctx->config = cfg = api->config_alloc();
63 if (!cfg) {
64 av_log(avctx, AV_LOG_ERROR,
65 "Could not allocate kvazaar config structure.\n");
66 return AVERROR(ENOMEM);
67 }
68
69 if (!api->config_init(cfg)) {
70 av_log(avctx, AV_LOG_ERROR,
71 "Could not initialize kvazaar config structure.\n");
72 return AVERROR_BUG;
73 }
74
75 cfg->width = avctx->width;
76 cfg->height = avctx->height;
77
78 if (avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
79 av_log(avctx, AV_LOG_ERROR,
80 "Could not set framerate for kvazaar: integer overflow\n");
81 return AVERROR(EINVAL);
82 }
83 cfg->framerate_num = avctx->time_base.den;
84 cfg->framerate_denom = avctx->time_base.num * avctx->ticks_per_frame;
85 cfg->target_bitrate = avctx->bit_rate;
86 cfg->vui.sar_width = avctx->sample_aspect_ratio.num;
87 cfg->vui.sar_height = avctx->sample_aspect_ratio.den;
88
89 if (ctx->kvz_params) {
90 AVDictionary *dict = NULL;
91 if (!av_dict_parse_string(&dict, ctx->kvz_params, "=", ",", 0)) {
92 AVDictionaryEntry *entry = NULL;
93 while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) {
94 if (!api->config_parse(cfg, entry->key, entry->value)) {
95 av_log(avctx, AV_LOG_WARNING, "Invalid option: %s=%s.\n",
96 entry->key, entry->value);
97 }
98 }
99 av_dict_free(&dict);
100 }
101 }
102
103 ctx->encoder = enc = api->encoder_open(cfg);
104 if (!enc) {
105 av_log(avctx, AV_LOG_ERROR, "Could not open kvazaar encoder.\n");
106 return AVERROR_BUG;
107 }
108
109 if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
110 kvz_data_chunk *data_out = NULL;
111 kvz_data_chunk *chunk = NULL;
112 uint32_t len_out;
113 uint8_t *p;
114
115 if (!api->encoder_headers(enc, &data_out, &len_out))
116 return AVERROR(ENOMEM);
117
118 avctx->extradata = p = av_mallocz(len_out + AV_INPUT_BUFFER_PADDING_SIZE);
119 if (!p) {
120 ctx->api->chunk_free(data_out);
121 return AVERROR(ENOMEM);
122 }
123
124 avctx->extradata_size = len_out;
125
126 for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
127 memcpy(p, chunk->data, chunk->len);
128 p += chunk->len;
129 }
130
131 ctx->api->chunk_free(data_out);
132 }
133
134 return 0;
135}
136
137static av_cold int libkvazaar_close(AVCodecContext *avctx)
138{
139 LibkvazaarContext *ctx = avctx->priv_data;
140
141 if (ctx->api) {
142 ctx->api->encoder_close(ctx->encoder);
143 ctx->api->config_destroy(ctx->config);
144 }
145
146 if (avctx->extradata)
147 av_freep(&avctx->extradata);
148
149 return 0;
150}
151
152static int libkvazaar_encode(AVCodecContext *avctx,
153 AVPacket *avpkt,
154 const AVFrame *frame,
155 int *got_packet_ptr)
156{
157 LibkvazaarContext *ctx = avctx->priv_data;
158 kvz_picture *input_pic = NULL;
159 kvz_picture *recon_pic = NULL;
160 kvz_frame_info frame_info;
161 kvz_data_chunk *data_out = NULL;
162 uint32_t len_out = 0;
163 int retval = 0;
164
165 *got_packet_ptr = 0;
166
167 if (frame) {
168 if (frame->width != ctx->config->width ||
169 frame->height != ctx->config->height) {
170 av_log(avctx, AV_LOG_ERROR,
171 "Changing video dimensions during encoding is not supported. "
172 "(changed from %dx%d to %dx%d)\n",
173 ctx->config->width, ctx->config->height,
174 frame->width, frame->height);
175 retval = AVERROR_INVALIDDATA;
176 goto done;
177 }
178
179 if (frame->format != avctx->pix_fmt) {
180 av_log(avctx, AV_LOG_ERROR,
181 "Changing pixel format during encoding is not supported. "
182 "(changed from %s to %s)\n",
183 av_get_pix_fmt_name(avctx->pix_fmt),
184 av_get_pix_fmt_name(frame->format));
185 retval = AVERROR_INVALIDDATA;
186 goto done;
187 }
188
189 // Allocate input picture for kvazaar.
190 input_pic = ctx->api->picture_alloc(frame->width, frame->height);
191 if (!input_pic) {
192 av_log(avctx, AV_LOG_ERROR, "Failed to allocate picture.\n");
193 retval = AVERROR(ENOMEM);
194 goto done;
195 }
196
197 // Copy pixels from frame to input_pic.
198 {
199 int dst_linesizes[4] = {
200 frame->width,
201 frame->width / 2,
202 frame->width / 2,
203 0
204 };
205 av_image_copy(input_pic->data, dst_linesizes,
206 frame->data, frame->linesize,
207 frame->format, frame->width, frame->height);
208 }
209
210 input_pic->pts = frame->pts;
211 }
212
213 retval = ctx->api->encoder_encode(ctx->encoder,
214 input_pic,
215 &data_out, &len_out,
216 &recon_pic, NULL,
217 &frame_info);
218 if (!retval) {
219 av_log(avctx, AV_LOG_ERROR, "Failed to encode frame.\n");
220 retval = AVERROR_INVALIDDATA;
221 goto done;
222 }
223 else
224 retval = 0; /* kvazaar returns 1 on success */
225
226 if (data_out) {
227 kvz_data_chunk *chunk = NULL;
228 uint64_t written = 0;
229
230 retval = ff_alloc_packet(avpkt, len_out);
231 if (retval < 0) {
232 av_log(avctx, AV_LOG_ERROR, "Failed to allocate output packet.\n");
233 goto done;
234 }
235
236 for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
237 av_assert0(written + chunk->len <= len_out);
238 memcpy(avpkt->data + written, chunk->data, chunk->len);
239 written += chunk->len;
240 }
241
242 avpkt->pts = recon_pic->pts;
243 avpkt->dts = recon_pic->dts;
244 avpkt->flags = 0;
245 // IRAP VCL NAL unit types span the range
246 // [BLA_W_LP (16), RSV_IRAP_VCL23 (23)].
247 if (frame_info.nal_unit_type >= KVZ_NAL_BLA_W_LP &&
248 frame_info.nal_unit_type <= KVZ_NAL_RSV_IRAP_VCL23) {
249 avpkt->flags |= AV_PKT_FLAG_KEY;
250 }
251
252 *got_packet_ptr = 1;
253 }
254
255done:
256 ctx->api->picture_free(input_pic);
257 ctx->api->picture_free(recon_pic);
258 ctx->api->chunk_free(data_out);
259 return retval;
260}
261
262static const enum AVPixelFormat pix_fmts[] = {
263 AV_PIX_FMT_YUV420P,
264 AV_PIX_FMT_NONE
265};
266
267#define OFFSET(x) offsetof(LibkvazaarContext, x)
268#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
269static const AVOption options[] = {
270 { "kvazaar-params", "Set kvazaar parameters as a comma-separated list of key=value pairs.",
271 OFFSET(kvz_params), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, VE },
272 { NULL },
273};
274
275static const AVClass class = {
276 .class_name = "libkvazaar",
277 .item_name = av_default_item_name,
278 .option = options,
279 .version = LIBAVUTIL_VERSION_INT,
280};
281
282static const AVCodecDefault defaults[] = {
283 { "b", "0" },
284 { NULL },
285};
286
287AVCodec ff_libkvazaar_encoder = {
288 .name = "libkvazaar",
289 .long_name = NULL_IF_CONFIG_SMALL("libkvazaar H.265 / HEVC"),
290 .type = AVMEDIA_TYPE_VIDEO,
291 .id = AV_CODEC_ID_HEVC,
292 .capabilities = AV_CODEC_CAP_DELAY,
293 .pix_fmts = pix_fmts,
294
295 .priv_class = &class,
296 .priv_data_size = sizeof(LibkvazaarContext),
297 .defaults = defaults,
298
299 .init = libkvazaar_init,
300 .encode2 = libkvazaar_encode,
301 .close = libkvazaar_close,
302
303 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
304};
305
generated by cgit at 2024-05-17 05:48:05 (GMT)