src/feature/ffmpeg/ffmpeg-encoder.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "ffmpeg-encoder.h"
7
8#include <mgba/core/core.h>
9#include <mgba/internal/gba/video.h>
10
11#include <libavcodec/version.h>
12#include <libavcodec/avcodec.h>
13
14#include <libavutil/version.h>
15#if LIBAVUTIL_VERSION_MAJOR >= 53
16#include <libavutil/buffer.h>
17#endif
18#include <libavutil/imgutils.h>
19#include <libavutil/mathematics.h>
20#include <libavutil/opt.h>
21
22#ifdef USE_LIBAVRESAMPLE
23#include <libavresample/avresample.h>
24#else
25#include <libswresample/swresample.h>
26#endif
27#include <libswscale/swscale.h>
28
29static void _ffmpegPostVideoFrame(struct mAVStream*, const color_t* pixels, size_t stride);
30static void _ffmpegPostAudioFrame(struct mAVStream*, int16_t left, int16_t right);
31static void _ffmpegSetVideoDimensions(struct mAVStream*, unsigned width, unsigned height);
32static void _ffmpegSetVideoFrameRate(struct mAVStream*, unsigned numerator, unsigned denominator);
33
34enum {
35 PREFERRED_SAMPLE_RATE = 0x8000
36};
37
38void FFmpegEncoderInit(struct FFmpegEncoder* encoder) {
39 av_register_all();
40
41 encoder->d.videoDimensionsChanged = _ffmpegSetVideoDimensions;
42 encoder->d.postVideoFrame = _ffmpegPostVideoFrame;
43 encoder->d.postAudioFrame = _ffmpegPostAudioFrame;
44 encoder->d.postAudioBuffer = 0;
45 encoder->d.videoFrameRateChanged = _ffmpegSetVideoFrameRate;
46
47 encoder->audioCodec = 0;
48 encoder->videoCodec = 0;
49 encoder->audio = NULL;
50 encoder->video = NULL;
51 encoder->containerFormat = 0;
52 FFmpegEncoderSetAudio(encoder, "flac", 0);
53 FFmpegEncoderSetVideo(encoder, "png", 0);
54 FFmpegEncoderSetContainer(encoder, "matroska");
55 FFmpegEncoderSetDimensions(encoder, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
56 encoder->iwidth = VIDEO_HORIZONTAL_PIXELS;
57 encoder->iheight = VIDEO_VERTICAL_PIXELS;
58 encoder->frameCycles = VIDEO_TOTAL_LENGTH;
59 encoder->cycles = GBA_ARM7TDMI_FREQUENCY;
60 encoder->resampleContext = 0;
61 encoder->absf = 0;
62 encoder->context = 0;
63 encoder->scaleContext = NULL;
64}
65
66bool FFmpegEncoderSetAudio(struct FFmpegEncoder* encoder, const char* acodec, unsigned abr) {
67 static const struct {
68 int format;
69 int priority;
70 } priorities[] = {
71 { AV_SAMPLE_FMT_S16, 0 },
72 { AV_SAMPLE_FMT_S16P, 1 },
73 { AV_SAMPLE_FMT_S32, 2 },
74 { AV_SAMPLE_FMT_S32P, 2 },
75 { AV_SAMPLE_FMT_FLT, 3 },
76 { AV_SAMPLE_FMT_FLTP, 3 },
77 { AV_SAMPLE_FMT_DBL, 4 },
78 { AV_SAMPLE_FMT_DBLP, 4 }
79 };
80
81 if (!acodec) {
82 encoder->audioCodec = 0;
83 return true;
84 }
85
86 AVCodec* codec = avcodec_find_encoder_by_name(acodec);
87 if (!codec) {
88 return false;
89 }
90
91 if (!codec->sample_fmts) {
92 return false;
93 }
94 size_t i;
95 size_t j;
96 int priority = INT_MAX;
97 encoder->sampleFormat = AV_SAMPLE_FMT_NONE;
98 for (i = 0; codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; ++i) {
99 for (j = 0; j < sizeof(priorities) / sizeof(*priorities); ++j) {
100 if (codec->sample_fmts[i] == priorities[j].format && priority > priorities[j].priority) {
101 priority = priorities[j].priority;
102 encoder->sampleFormat = codec->sample_fmts[i];
103 }
104 }
105 }
106 if (encoder->sampleFormat == AV_SAMPLE_FMT_NONE) {
107 return false;
108 }
109 encoder->sampleRate = PREFERRED_SAMPLE_RATE;
110 if (codec->supported_samplerates) {
111 for (i = 0; codec->supported_samplerates[i]; ++i) {
112 if (codec->supported_samplerates[i] < PREFERRED_SAMPLE_RATE) {
113 continue;
114 }
115 if (encoder->sampleRate == PREFERRED_SAMPLE_RATE || encoder->sampleRate > codec->supported_samplerates[i]) {
116 encoder->sampleRate = codec->supported_samplerates[i];
117 }
118 }
119 } else if (codec->id == AV_CODEC_ID_AAC) {
120 // HACK: AAC doesn't support 32768Hz (it rounds to 32000), but libfaac doesn't tell us that
121 encoder->sampleRate = 44100;
122 }
123 encoder->audioCodec = acodec;
124 encoder->audioBitrate = abr;
125 return true;
126}
127
128bool FFmpegEncoderSetVideo(struct FFmpegEncoder* encoder, const char* vcodec, unsigned vbr) {
129 static const struct {
130 enum AVPixelFormat format;
131 int priority;
132 } priorities[] = {
133 { AV_PIX_FMT_RGB555, 0 },
134 { AV_PIX_FMT_BGR555, 0 },
135 { AV_PIX_FMT_RGB565, 1 },
136 { AV_PIX_FMT_BGR565, 1 },
137 { AV_PIX_FMT_RGB24, 2 },
138 { AV_PIX_FMT_BGR24, 2 },
139#ifndef USE_LIBAV
140 { AV_PIX_FMT_BGR0, 3 },
141 { AV_PIX_FMT_RGB0, 3 },
142 { AV_PIX_FMT_0BGR, 3 },
143 { AV_PIX_FMT_0RGB, 3 },
144#endif
145 { AV_PIX_FMT_YUV422P, 4 },
146 { AV_PIX_FMT_YUV444P, 5 },
147 { AV_PIX_FMT_YUV420P, 6 }
148 };
149 AVCodec* codec = avcodec_find_encoder_by_name(vcodec);
150 if (!codec) {
151 return false;
152 }
153
154 size_t i;
155 size_t j;
156 int priority = INT_MAX;
157 encoder->pixFormat = AV_PIX_FMT_NONE;
158 for (i = 0; codec->pix_fmts[i] != AV_PIX_FMT_NONE; ++i) {
159 for (j = 0; j < sizeof(priorities) / sizeof(*priorities); ++j) {
160 if (codec->pix_fmts[i] == priorities[j].format && priority > priorities[j].priority) {
161 priority = priorities[j].priority;
162 encoder->pixFormat = codec->pix_fmts[i];
163 }
164 }
165 }
166 if (encoder->pixFormat == AV_PIX_FMT_NONE) {
167 return false;
168 }
169 encoder->videoCodec = vcodec;
170 encoder->videoBitrate = vbr;
171 return true;
172}
173
174bool FFmpegEncoderSetContainer(struct FFmpegEncoder* encoder, const char* container) {
175 AVOutputFormat* oformat = av_guess_format(container, 0, 0);
176 if (!oformat) {
177 return false;
178 }
179 encoder->containerFormat = container;
180 return true;
181}
182
183void FFmpegEncoderSetDimensions(struct FFmpegEncoder* encoder, int width, int height) {
184 encoder->width = width > 0 ? width : VIDEO_HORIZONTAL_PIXELS;
185 encoder->height = height > 0 ? height : VIDEO_VERTICAL_PIXELS;
186}
187
188bool FFmpegEncoderVerifyContainer(struct FFmpegEncoder* encoder) {
189 AVOutputFormat* oformat = av_guess_format(encoder->containerFormat, 0, 0);
190 AVCodec* acodec = avcodec_find_encoder_by_name(encoder->audioCodec);
191 AVCodec* vcodec = avcodec_find_encoder_by_name(encoder->videoCodec);
192 if ((encoder->audioCodec && !acodec) || !vcodec || !oformat) {
193 return false;
194 }
195 if (encoder->audioCodec && !avformat_query_codec(oformat, acodec->id, FF_COMPLIANCE_EXPERIMENTAL)) {
196 return false;
197 }
198 if (!avformat_query_codec(oformat, vcodec->id, FF_COMPLIANCE_EXPERIMENTAL)) {
199 return false;
200 }
201 return true;
202}
203
204bool FFmpegEncoderOpen(struct FFmpegEncoder* encoder, const char* outfile) {
205 AVCodec* acodec = avcodec_find_encoder_by_name(encoder->audioCodec);
206 AVCodec* vcodec = avcodec_find_encoder_by_name(encoder->videoCodec);
207 if ((encoder->audioCodec && !acodec) || !vcodec || !FFmpegEncoderVerifyContainer(encoder)) {
208 return false;
209 }
210
211 encoder->currentAudioSample = 0;
212 encoder->currentAudioFrame = 0;
213 encoder->currentVideoFrame = 0;
214
215 AVOutputFormat* oformat = av_guess_format(encoder->containerFormat, 0, 0);
216#ifndef USE_LIBAV
217 avformat_alloc_output_context2(&encoder->context, oformat, 0, outfile);
218#else
219 encoder->context = avformat_alloc_context();
220 strncpy(encoder->context->filename, outfile, sizeof(encoder->context->filename) - 1);
221 encoder->context->filename[sizeof(encoder->context->filename) - 1] = '\0';
222 encoder->context->oformat = oformat;
223#endif
224
225 if (acodec) {
226#ifdef FFMPEG_USE_CODECPAR
227 encoder->audioStream = avformat_new_stream(encoder->context, NULL);
228 encoder->audio = avcodec_alloc_context3(acodec);
229#else
230 encoder->audioStream = avformat_new_stream(encoder->context, acodec);
231 encoder->audio = encoder->audioStream->codec;
232#endif
233 encoder->audio->bit_rate = encoder->audioBitrate;
234 encoder->audio->channels = 2;
235 encoder->audio->channel_layout = AV_CH_LAYOUT_STEREO;
236 encoder->audio->sample_rate = encoder->sampleRate;
237 encoder->audio->sample_fmt = encoder->sampleFormat;
238 AVDictionary* opts = 0;
239 av_dict_set(&opts, "strict", "-2", 0);
240 if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
241#ifdef AV_CODEC_FLAG_GLOBAL_HEADER
242 encoder->audio->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
243#else
244 encoder->audio->flags |= CODEC_FLAG_GLOBAL_HEADER;
245#endif
246 }
247 avcodec_open2(encoder->audio, acodec, &opts);
248 av_dict_free(&opts);
249#if LIBAVCODEC_VERSION_MAJOR >= 55
250 encoder->audioFrame = av_frame_alloc();
251#else
252 encoder->audioFrame = avcodec_alloc_frame();
253#endif
254 if (!encoder->audio->frame_size) {
255 encoder->audio->frame_size = 1;
256 }
257 encoder->audioFrame->nb_samples = encoder->audio->frame_size;
258 encoder->audioFrame->format = encoder->audio->sample_fmt;
259 encoder->audioFrame->pts = 0;
260#ifdef USE_LIBAVRESAMPLE
261 encoder->resampleContext = avresample_alloc_context();
262 av_opt_set_int(encoder->resampleContext, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
263 av_opt_set_int(encoder->resampleContext, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
264 av_opt_set_int(encoder->resampleContext, "in_sample_rate", PREFERRED_SAMPLE_RATE, 0);
265 av_opt_set_int(encoder->resampleContext, "out_sample_rate", encoder->sampleRate, 0);
266 av_opt_set_int(encoder->resampleContext, "in_sample_fmt", AV_SAMPLE_FMT_S16, 0);
267 av_opt_set_int(encoder->resampleContext, "out_sample_fmt", encoder->sampleFormat, 0);
268 avresample_open(encoder->resampleContext);
269#else
270 encoder->resampleContext = swr_alloc_set_opts(NULL, AV_CH_LAYOUT_STEREO, encoder->sampleFormat, encoder->sampleRate,
271 AV_CH_LAYOUT_STEREO, AV_SAMPLE_FMT_S16, PREFERRED_SAMPLE_RATE, 0, NULL);
272 swr_init(encoder->resampleContext);
273#endif
274 encoder->audioBufferSize = (encoder->audioFrame->nb_samples * PREFERRED_SAMPLE_RATE / encoder->sampleRate) * 4;
275 encoder->audioBuffer = av_malloc(encoder->audioBufferSize);
276 encoder->postaudioBufferSize = av_samples_get_buffer_size(0, encoder->audio->channels, encoder->audio->frame_size, encoder->audio->sample_fmt, 0);
277 encoder->postaudioBuffer = av_malloc(encoder->postaudioBufferSize);
278 avcodec_fill_audio_frame(encoder->audioFrame, encoder->audio->channels, encoder->audio->sample_fmt, (const uint8_t*) encoder->postaudioBuffer, encoder->postaudioBufferSize, 0);
279
280 if (encoder->audio->codec->id == AV_CODEC_ID_AAC &&
281 (strcasecmp(encoder->containerFormat, "mp4") ||
282 strcasecmp(encoder->containerFormat, "m4v") ||
283 strcasecmp(encoder->containerFormat, "mov"))) {
284 // MP4 container doesn't support the raw ADTS AAC format that the encoder spits out
285#ifdef FFMPEG_USE_NEW_BSF
286 av_bsf_alloc(av_bsf_get_by_name("aac_adtstoasc"), &encoder->absf);
287 avcodec_parameters_from_context(encoder->absf->par_in, encoder->audio);
288 av_bsf_init(encoder->absf);
289#else
290 encoder->absf = av_bitstream_filter_init("aac_adtstoasc");
291#endif
292 }
293#ifdef FFMPEG_USE_CODECPAR
294 avcodec_parameters_from_context(encoder->audioStream->codecpar, encoder->audio);
295#endif
296 }
297
298#ifdef FFMPEG_USE_CODECPAR
299 encoder->videoStream = avformat_new_stream(encoder->context, NULL);
300 encoder->video = avcodec_alloc_context3(vcodec);
301#else
302 encoder->videoStream = avformat_new_stream(encoder->context, vcodec);
303 encoder->video = encoder->videoStream->codec;
304#endif
305 encoder->video->bit_rate = encoder->videoBitrate;
306 encoder->video->width = encoder->width;
307 encoder->video->height = encoder->height;
308 encoder->video->time_base = (AVRational) { encoder->frameCycles, encoder->cycles };
309 encoder->video->framerate = (AVRational) { encoder->cycles, encoder->frameCycles };
310 encoder->video->pix_fmt = encoder->pixFormat;
311 encoder->video->gop_size = 60;
312 encoder->video->max_b_frames = 3;
313 if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
314#ifdef AV_CODEC_FLAG_GLOBAL_HEADER
315 encoder->video->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
316#else
317 encoder->video->flags |= CODEC_FLAG_GLOBAL_HEADER;
318#endif
319 }
320
321 if (encoder->video->codec->id == AV_CODEC_ID_H264 &&
322 (strcasecmp(encoder->containerFormat, "mp4") ||
323 strcasecmp(encoder->containerFormat, "m4v") ||
324 strcasecmp(encoder->containerFormat, "mov"))) {
325 // QuickTime and a few other things require YUV420
326 encoder->video->pix_fmt = AV_PIX_FMT_YUV420P;
327 }
328
329 if (strcmp(vcodec->name, "libx264") == 0) {
330 // Try to adaptively figure out when you can use a slower encoder
331 if (encoder->width * encoder->height > 1000000) {
332 av_opt_set(encoder->video->priv_data, "preset", "superfast", 0);
333 } else if (encoder->width * encoder->height > 500000) {
334 av_opt_set(encoder->video->priv_data, "preset", "veryfast", 0);
335 } else {
336 av_opt_set(encoder->video->priv_data, "preset", "faster", 0);
337 }
338 if (encoder->videoBitrate == 0) {
339 av_opt_set(encoder->video->priv_data, "crf", "0", 0);
340 encoder->video->pix_fmt = AV_PIX_FMT_YUV444P;
341 }
342 }
343 if (strcmp(vcodec->name, "libvpx-vp9") == 0 && encoder->videoBitrate == 0) {
344 av_opt_set(encoder->video->priv_data, "lossless", "1", 0);
345 encoder->video->pix_fmt = AV_PIX_FMT_YUV444P;
346 }
347
348 avcodec_open2(encoder->video, vcodec, 0);
349#if LIBAVCODEC_VERSION_MAJOR >= 55
350 encoder->videoFrame = av_frame_alloc();
351#else
352 encoder->videoFrame = avcodec_alloc_frame();
353#endif
354 encoder->videoFrame->format = encoder->video->pix_fmt;
355 encoder->videoFrame->width = encoder->video->width;
356 encoder->videoFrame->height = encoder->video->height;
357 encoder->videoFrame->pts = 0;
358 _ffmpegSetVideoDimensions(&encoder->d, encoder->iwidth, encoder->iheight);
359 av_image_alloc(encoder->videoFrame->data, encoder->videoFrame->linesize, encoder->video->width, encoder->video->height, encoder->video->pix_fmt, 32);
360#ifdef FFMPEG_USE_CODECPAR
361 avcodec_parameters_from_context(encoder->videoStream->codecpar, encoder->video);
362#endif
363
364 if (avio_open(&encoder->context->pb, outfile, AVIO_FLAG_WRITE) < 0) {
365 return false;
366 }
367 return avformat_write_header(encoder->context, 0) >= 0;
368}
369
370void FFmpegEncoderClose(struct FFmpegEncoder* encoder) {
371 if (!encoder->context) {
372 return;
373 }
374 av_write_trailer(encoder->context);
375 avio_close(encoder->context->pb);
376
377 if (encoder->audioCodec) {
378 av_free(encoder->postaudioBuffer);
379 if (encoder->audioBuffer) {
380 av_free(encoder->audioBuffer);
381 }
382#if LIBAVCODEC_VERSION_MAJOR >= 55
383 av_frame_free(&encoder->audioFrame);
384#else
385 avcodec_free_frame(&encoder->audioFrame);
386#endif
387 avcodec_close(encoder->audio);
388 encoder->audio = NULL;
389
390 if (encoder->resampleContext) {
391#ifdef USE_LIBAVRESAMPLE
392 avresample_close(encoder->resampleContext);
393#else
394 swr_free(&encoder->resampleContext);
395#endif
396 }
397
398 if (encoder->absf) {
399#ifdef FFMPEG_USE_NEW_BSF
400 av_bsf_free(&encoder->absf);
401#else
402 av_bitstream_filter_close(encoder->absf);
403 encoder->absf = 0;
404#endif
405 }
406 }
407
408#if LIBAVCODEC_VERSION_MAJOR >= 55
409 av_frame_free(&encoder->videoFrame);
410#else
411 avcodec_free_frame(&encoder->videoFrame);
412#endif
413 avcodec_close(encoder->video);
414 encoder->video = NULL;
415
416 sws_freeContext(encoder->scaleContext);
417 encoder->scaleContext = NULL;
418
419 avformat_free_context(encoder->context);
420 encoder->context = 0;
421}
422
423bool FFmpegEncoderIsOpen(struct FFmpegEncoder* encoder) {
424 return !!encoder->context;
425}
426
427void _ffmpegPostAudioFrame(struct mAVStream* stream, int16_t left, int16_t right) {
428 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
429 if (!encoder->context || !encoder->audioCodec) {
430 return;
431 }
432
433 if (encoder->absf && !left) {
434 // XXX: AVBSF doesn't like silence. Figure out why.
435 left = 1;
436 }
437
438 encoder->audioBuffer[encoder->currentAudioSample * 2] = left;
439 encoder->audioBuffer[encoder->currentAudioSample * 2 + 1] = right;
440
441 ++encoder->currentAudioSample;
442
443 if (encoder->currentAudioSample * 4 < encoder->audioBufferSize) {
444 return;
445 }
446
447 int channelSize = 2 * av_get_bytes_per_sample(encoder->audio->sample_fmt);
448 encoder->currentAudioSample = 0;
449#ifdef USE_LIBAVRESAMPLE
450 avresample_convert(encoder->resampleContext, 0, 0, 0,
451 (uint8_t**) &encoder->audioBuffer, 0, encoder->audioBufferSize / 4);
452
453 if (avresample_available(encoder->resampleContext) < encoder->audioFrame->nb_samples) {
454 return;
455 }
456#if LIBAVCODEC_VERSION_MAJOR >= 55
457 av_frame_make_writable(encoder->audioFrame);
458#endif
459 int samples = avresample_read(encoder->resampleContext, encoder->audioFrame->data, encoder->postaudioBufferSize / channelSize);
460#else
461#if LIBAVCODEC_VERSION_MAJOR >= 55
462 av_frame_make_writable(encoder->audioFrame);
463#endif
464 if (swr_get_out_samples(encoder->resampleContext, encoder->audioBufferSize / 4) < encoder->audioFrame->nb_samples) {
465 swr_convert(encoder->resampleContext, NULL, 0, (const uint8_t**) &encoder->audioBuffer, encoder->audioBufferSize / 4);
466 return;
467 }
468 int samples = swr_convert(encoder->resampleContext, encoder->audioFrame->data, encoder->postaudioBufferSize / channelSize,
469 (const uint8_t**) &encoder->audioBuffer, encoder->audioBufferSize / 4);
470#endif
471
472 encoder->audioFrame->pts = encoder->currentAudioFrame;
473 encoder->currentAudioFrame += samples;
474
475 AVPacket packet;
476 av_init_packet(&packet);
477 packet.data = 0;
478 packet.size = 0;
479
480 int gotData;
481#ifdef FFMPEG_USE_PACKETS
482 avcodec_send_frame(encoder->audio, encoder->audioFrame);
483 gotData = avcodec_receive_packet(encoder->audio, &packet);
484 gotData = (gotData == 0) && packet.size;
485#else
486 avcodec_encode_audio2(encoder->audio, &packet, encoder->audioFrame, &gotData);
487#endif
488 packet.pts = av_rescale_q(encoder->audioFrame->pts, encoder->audio->time_base, encoder->audioStream->time_base);
489 packet.dts = packet.pts;
490
491 if (gotData) {
492 if (encoder->absf) {
493 AVPacket tempPacket;
494
495#ifdef FFMPEG_USE_NEW_BSF
496 int success = av_bsf_send_packet(encoder->absf, &packet);
497 if (success >= 0) {
498 success = av_bsf_receive_packet(encoder->absf, &tempPacket);
499 }
500#else
501 int success = av_bitstream_filter_filter(encoder->absf, encoder->audio, 0,
502 &tempPacket.data, &tempPacket.size,
503 packet.data, packet.size, 0);
504#endif
505
506 if (success >= 0) {
507#if LIBAVUTIL_VERSION_MAJOR >= 53
508 tempPacket.buf = av_buffer_create(tempPacket.data, tempPacket.size, av_buffer_default_free, 0, 0);
509#endif
510
511#ifdef FFMPEG_USE_PACKET_UNREF
512 av_packet_move_ref(&packet, &tempPacket);
513#else
514 av_free_packet(&packet);
515 packet = tempPacket;
516#endif
517
518 packet.stream_index = encoder->audioStream->index;
519 av_interleaved_write_frame(encoder->context, &packet);
520 }
521 } else {
522 packet.stream_index = encoder->audioStream->index;
523 av_interleaved_write_frame(encoder->context, &packet);
524 }
525 }
526#ifdef FFMPEG_USE_PACKET_UNREF
527 av_packet_unref(&packet);
528#else
529 av_free_packet(&packet);
530#endif
531}
532
533void _ffmpegPostVideoFrame(struct mAVStream* stream, const color_t* pixels, size_t stride) {
534 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
535 if (!encoder->context) {
536 return;
537 }
538 stride *= BYTES_PER_PIXEL;
539
540 AVPacket packet;
541
542 av_init_packet(&packet);
543 packet.data = 0;
544 packet.size = 0;
545#if LIBAVCODEC_VERSION_MAJOR >= 55
546 av_frame_make_writable(encoder->videoFrame);
547#endif
548 encoder->videoFrame->pts = av_rescale_q(encoder->currentVideoFrame, encoder->video->time_base, encoder->videoStream->time_base);
549 ++encoder->currentVideoFrame;
550
551 sws_scale(encoder->scaleContext, (const uint8_t* const*) &pixels, (const int*) &stride, 0, encoder->iheight, encoder->videoFrame->data, encoder->videoFrame->linesize);
552
553 int gotData;
554#ifdef FFMPEG_USE_PACKETS
555 avcodec_send_frame(encoder->video, encoder->videoFrame);
556 gotData = avcodec_receive_packet(encoder->video, &packet) == 0;
557#else
558 avcodec_encode_video2(encoder->video, &packet, encoder->videoFrame, &gotData);
559#endif
560 packet.pts = encoder->videoFrame->pts;
561 if (gotData) {
562#ifndef FFMPEG_USE_PACKET_UNREF
563 if (encoder->video->coded_frame->key_frame) {
564 packet.flags |= AV_PKT_FLAG_KEY;
565 }
566#endif
567 packet.stream_index = encoder->videoStream->index;
568 av_interleaved_write_frame(encoder->context, &packet);
569 }
570#ifdef FFMPEG_USE_PACKET_UNREF
571 av_packet_unref(&packet);
572#else
573 av_free_packet(&packet);
574#endif
575}
576
577static void _ffmpegSetVideoDimensions(struct mAVStream* stream, unsigned width, unsigned height) {
578 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
579 encoder->iwidth = width;
580 encoder->iheight = height;
581 if (encoder->video) {
582 if (encoder->scaleContext) {
583 sws_freeContext(encoder->scaleContext);
584 }
585 encoder->scaleContext = sws_getContext(encoder->iwidth, encoder->iheight,
586#ifdef COLOR_16_BIT
587#ifdef COLOR_5_6_5
588 AV_PIX_FMT_RGB565,
589#else
590 AV_PIX_FMT_BGR555,
591#endif
592#else
593#ifndef USE_LIBAV
594 AV_PIX_FMT_0BGR32,
595#else
596 AV_PIX_FMT_BGR32,
597#endif
598#endif
599 encoder->videoFrame->width, encoder->videoFrame->height, encoder->video->pix_fmt,
600 SWS_POINT, 0, 0, 0);
601 }
602}
603
604static void _ffmpegSetVideoFrameRate(struct mAVStream* stream, unsigned numerator, unsigned denominator) {
605 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
606 FFmpegEncoderSetInputFrameRate(encoder, numerator, denominator);
607}
608
609void FFmpegEncoderSetInputFrameRate(struct FFmpegEncoder* encoder, unsigned numerator, unsigned denominator) {
610 encoder->frameCycles = numerator;
611 encoder->cycles = denominator;
612 if (encoder->video) {
613 encoder->video->time_base = (AVRational) { numerator, denominator };
614 }
615}