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libkvazaar.c
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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 
37 typedef 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;
46 
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 
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 
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",
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 
255 done:
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 
262 static const enum AVPixelFormat pix_fmts[] = {
265 };
266 
267 #define OFFSET(x) offsetof(LibkvazaarContext, x)
268 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
269 static 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 
275 static const AVClass class = {
276  .class_name = "libkvazaar",
277  .item_name = av_default_item_name,
278  .option = options,
280 };
281 
282 static const AVCodecDefault defaults[] = {
283  { "b", "0" },
284  { NULL },
285 };
286 
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 
300  .encode2 = libkvazaar_encode,
301  .close = libkvazaar_close,
302 
304 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
AVOption.
Definition: opt.h:246
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1797
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int num
Numerator.
Definition: rational.h:59
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:2143
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1960
static av_cold int libkvazaar_close(AVCodecContext *avctx)
Definition: libkvazaar.c:137
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
AVCodec ff_libkvazaar_encoder
Definition: libkvazaar.c:287
#define VE
Definition: libkvazaar.c:268
AVCodec.
Definition: avcodec.h:3681
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1869
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:1019
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Public dictionary API.
#define OFFSET(x)
Definition: libkvazaar.c:267
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
uint8_t
#define av_cold
Definition: attributes.h:82
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:271
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1847
static AVFrame * frame
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
uint8_t * data
Definition: avcodec.h:1657
kvz_encoder * encoder
Definition: libkvazaar.c:41
kvz_config * config
Definition: libkvazaar.c:42
#define av_log(a,...)
const kvz_api * api
Definition: libkvazaar.c:40
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1689
int width
width and height of the video frame
Definition: frame.h:239
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
error code definitions
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1827
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3688
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:385
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1663
static const AVOption options[]
Definition: libkvazaar.c:269
common internal API header
int width
picture width / height.
Definition: avcodec.h:1919
AVFormatContext * ctx
Definition: movenc.c:48
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1878
static const AVCodecDefault defaults[]
Definition: libkvazaar.c:282
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:251
int av_dict_parse_string(AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags)
Parse the key/value pairs list and add the parsed entries to a dictionary.
Definition: dict.c:180
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
main external API structure.
Definition: avcodec.h:1732
int extradata_size
Definition: avcodec.h:1848
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
Describe the class of an AVClass context structure.
Definition: log.h:67
static int libkvazaar_encode(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: libkvazaar.c:152
static av_cold int libkvazaar_init(AVCodecContext *avctx)
Definition: libkvazaar.c:47
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
#define AV_CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:917
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
common internal api header.
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:769
void * priv_data
Definition: avcodec.h:1774
char * value
Definition: dict.h:87
attribute_deprecated int ff_alloc_packet(AVPacket *avpkt, int size)
Definition: utils.c:1777
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1656
int height
Definition: frame.h:239
#define av_freep(p)
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2249
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1634
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1650