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 encoder->nextAudioPts = 0;
215
216 AVOutputFormat* oformat = av_guess_format(encoder->containerFormat, 0, 0);
217#ifndef USE_LIBAV
218 avformat_alloc_output_context2(&encoder->context, oformat, 0, outfile);
219#else
220 encoder->context = avformat_alloc_context();
221 strncpy(encoder->context->filename, outfile, sizeof(encoder->context->filename) - 1);
222 encoder->context->filename[sizeof(encoder->context->filename) - 1] = '\0';
223 encoder->context->oformat = oformat;
224#endif
225
226 if (acodec) {
227#ifdef FFMPEG_USE_CODECPAR
228 encoder->audioStream = avformat_new_stream(encoder->context, NULL);
229 encoder->audio = avcodec_alloc_context3(acodec);
230#else
231 encoder->audioStream = avformat_new_stream(encoder->context, acodec);
232 encoder->audio = encoder->audioStream->codec;
233#endif
234 encoder->audio->bit_rate = encoder->audioBitrate;
235 encoder->audio->channels = 2;
236 encoder->audio->channel_layout = AV_CH_LAYOUT_STEREO;
237 encoder->audio->sample_rate = encoder->sampleRate;
238 encoder->audio->sample_fmt = encoder->sampleFormat;
239 AVDictionary* opts = 0;
240 av_dict_set(&opts, "strict", "-2", 0);
241 if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
242#ifdef AV_CODEC_FLAG_GLOBAL_HEADER
243 encoder->audio->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
244#else
245 encoder->audio->flags |= CODEC_FLAG_GLOBAL_HEADER;
246#endif
247 }
248 avcodec_open2(encoder->audio, acodec, &opts);
249 av_dict_free(&opts);
250#if LIBAVCODEC_VERSION_MAJOR >= 55
251 encoder->audioFrame = av_frame_alloc();
252#else
253 encoder->audioFrame = avcodec_alloc_frame();
254#endif
255 if (!encoder->audio->frame_size) {
256 encoder->audio->frame_size = 1;
257 }
258 encoder->audioFrame->nb_samples = encoder->audio->frame_size;
259 encoder->audioFrame->format = encoder->audio->sample_fmt;
260 encoder->audioFrame->pts = 0;
261#ifdef USE_LIBAVRESAMPLE
262 encoder->resampleContext = avresample_alloc_context();
263 av_opt_set_int(encoder->resampleContext, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
264 av_opt_set_int(encoder->resampleContext, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
265 av_opt_set_int(encoder->resampleContext, "in_sample_rate", PREFERRED_SAMPLE_RATE, 0);
266 av_opt_set_int(encoder->resampleContext, "out_sample_rate", encoder->sampleRate, 0);
267 av_opt_set_int(encoder->resampleContext, "in_sample_fmt", AV_SAMPLE_FMT_S16, 0);
268 av_opt_set_int(encoder->resampleContext, "out_sample_fmt", encoder->sampleFormat, 0);
269 avresample_open(encoder->resampleContext);
270#else
271 encoder->resampleContext = swr_alloc_set_opts(NULL, AV_CH_LAYOUT_STEREO, encoder->sampleFormat, encoder->sampleRate,
272 AV_CH_LAYOUT_STEREO, AV_SAMPLE_FMT_S16, PREFERRED_SAMPLE_RATE, 0, NULL);
273 swr_init(encoder->resampleContext);
274#endif
275 encoder->audioBufferSize = (encoder->audioFrame->nb_samples * PREFERRED_SAMPLE_RATE / encoder->sampleRate) * 4;
276 encoder->audioBuffer = av_malloc(encoder->audioBufferSize);
277 encoder->postaudioBufferSize = av_samples_get_buffer_size(0, encoder->audio->channels, encoder->audio->frame_size, encoder->audio->sample_fmt, 0);
278 encoder->postaudioBuffer = av_malloc(encoder->postaudioBufferSize);
279 avcodec_fill_audio_frame(encoder->audioFrame, encoder->audio->channels, encoder->audio->sample_fmt, (const uint8_t*) encoder->postaudioBuffer, encoder->postaudioBufferSize, 0);
280
281 if (encoder->audio->codec->id == AV_CODEC_ID_AAC &&
282 (strcasecmp(encoder->containerFormat, "mp4") ||
283 strcasecmp(encoder->containerFormat, "m4v") ||
284 strcasecmp(encoder->containerFormat, "mov"))) {
285 // MP4 container doesn't support the raw ADTS AAC format that the encoder spits out
286#ifdef FFMPEG_USE_NEW_BSF
287 av_bsf_alloc(av_bsf_get_by_name("aac_adtstoasc"), &encoder->absf);
288 avcodec_parameters_from_context(encoder->absf->par_in, encoder->audio);
289 av_bsf_init(encoder->absf);
290#else
291 encoder->absf = av_bitstream_filter_init("aac_adtstoasc");
292#endif
293 }
294#ifdef FFMPEG_USE_CODECPAR
295 avcodec_parameters_from_context(encoder->audioStream->codecpar, encoder->audio);
296#endif
297 }
298
299#ifdef FFMPEG_USE_CODECPAR
300 encoder->videoStream = avformat_new_stream(encoder->context, NULL);
301 encoder->video = avcodec_alloc_context3(vcodec);
302#else
303 encoder->videoStream = avformat_new_stream(encoder->context, vcodec);
304 encoder->video = encoder->videoStream->codec;
305#endif
306 encoder->video->bit_rate = encoder->videoBitrate;
307 encoder->video->width = encoder->width;
308 encoder->video->height = encoder->height;
309 encoder->videoStream->time_base = (AVRational) { encoder->frameCycles, encoder->cycles };
310 encoder->video->time_base = encoder->videoStream->time_base;
311 encoder->video->pix_fmt = encoder->pixFormat;
312 encoder->video->gop_size = 60;
313 encoder->video->max_b_frames = 3;
314 if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
315#ifdef AV_CODEC_FLAG_GLOBAL_HEADER
316 encoder->video->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
317#else
318 encoder->video->flags |= CODEC_FLAG_GLOBAL_HEADER;
319#endif
320 }
321
322 if (encoder->video->codec->id == AV_CODEC_ID_H264 &&
323 (strcasecmp(encoder->containerFormat, "mp4") ||
324 strcasecmp(encoder->containerFormat, "m4v") ||
325 strcasecmp(encoder->containerFormat, "mov"))) {
326 // QuickTime and a few other things require YUV420
327 encoder->video->pix_fmt = AV_PIX_FMT_YUV420P;
328 }
329
330 if (strcmp(vcodec->name, "libx264") == 0) {
331 // Try to adaptively figure out when you can use a slower encoder
332 if (encoder->width * encoder->height > 1000000) {
333 av_opt_set(encoder->video->priv_data, "preset", "superfast", 0);
334 } else if (encoder->width * encoder->height > 500000) {
335 av_opt_set(encoder->video->priv_data, "preset", "veryfast", 0);
336 } else {
337 av_opt_set(encoder->video->priv_data, "preset", "faster", 0);
338 }
339 if (encoder->videoBitrate == 0) {
340 av_opt_set(encoder->video->priv_data, "crf", "0", 0);
341 encoder->video->pix_fmt = AV_PIX_FMT_YUV444P;
342 }
343 }
344
345 avcodec_open2(encoder->video, vcodec, 0);
346#if LIBAVCODEC_VERSION_MAJOR >= 55
347 encoder->videoFrame = av_frame_alloc();
348#else
349 encoder->videoFrame = avcodec_alloc_frame();
350#endif
351 encoder->videoFrame->format = encoder->video->pix_fmt;
352 encoder->videoFrame->width = encoder->video->width;
353 encoder->videoFrame->height = encoder->video->height;
354 encoder->videoFrame->pts = 0;
355 _ffmpegSetVideoDimensions(&encoder->d, encoder->iwidth, encoder->iheight);
356 av_image_alloc(encoder->videoFrame->data, encoder->videoFrame->linesize, encoder->video->width, encoder->video->height, encoder->video->pix_fmt, 32);
357#ifdef FFMPEG_USE_CODECPAR
358 avcodec_parameters_from_context(encoder->videoStream->codecpar, encoder->video);
359#endif
360
361 if (avio_open(&encoder->context->pb, outfile, AVIO_FLAG_WRITE) < 0) {
362 return false;
363 }
364 return avformat_write_header(encoder->context, 0) >= 0;
365}
366
367void FFmpegEncoderClose(struct FFmpegEncoder* encoder) {
368 if (!encoder->context) {
369 return;
370 }
371 av_write_trailer(encoder->context);
372 avio_close(encoder->context->pb);
373
374 if (encoder->audioCodec) {
375 av_free(encoder->postaudioBuffer);
376 if (encoder->audioBuffer) {
377 av_free(encoder->audioBuffer);
378 }
379#if LIBAVCODEC_VERSION_MAJOR >= 55
380 av_frame_free(&encoder->audioFrame);
381#else
382 avcodec_free_frame(&encoder->audioFrame);
383#endif
384 avcodec_close(encoder->audio);
385 encoder->audio = NULL;
386
387 if (encoder->resampleContext) {
388#ifdef USE_LIBAVRESAMPLE
389 avresample_close(encoder->resampleContext);
390#else
391 swr_free(&encoder->resampleContext);
392#endif
393 }
394
395 if (encoder->absf) {
396#ifdef FFMPEG_USE_NEW_BSF
397 av_bsf_free(&encoder->absf);
398#else
399 av_bitstream_filter_close(encoder->absf);
400 encoder->absf = 0;
401#endif
402 }
403 }
404
405#if LIBAVCODEC_VERSION_MAJOR >= 55
406 av_frame_free(&encoder->videoFrame);
407#else
408 avcodec_free_frame(&encoder->videoFrame);
409#endif
410 avcodec_close(encoder->video);
411 encoder->video = NULL;
412
413 sws_freeContext(encoder->scaleContext);
414 encoder->scaleContext = NULL;
415
416 avformat_free_context(encoder->context);
417 encoder->context = 0;
418}
419
420bool FFmpegEncoderIsOpen(struct FFmpegEncoder* encoder) {
421 return !!encoder->context;
422}
423
424void _ffmpegPostAudioFrame(struct mAVStream* stream, int16_t left, int16_t right) {
425 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
426 if (!encoder->context || !encoder->audioCodec) {
427 return;
428 }
429
430 if (encoder->absf && !left) {
431 // XXX: AVBSF doesn't like silence. Figure out why.
432 left = 1;
433 }
434
435 encoder->audioBuffer[encoder->currentAudioSample * 2] = left;
436 encoder->audioBuffer[encoder->currentAudioSample * 2 + 1] = right;
437
438 ++encoder->currentAudioSample;
439
440 if (encoder->currentAudioSample * 4 < encoder->audioBufferSize) {
441 return;
442 }
443
444 int channelSize = 2 * av_get_bytes_per_sample(encoder->audio->sample_fmt);
445 encoder->currentAudioSample = 0;
446#ifdef USE_LIBAVRESAMPLE
447 avresample_convert(encoder->resampleContext, 0, 0, 0,
448 (uint8_t**) &encoder->audioBuffer, 0, encoder->audioBufferSize / 4);
449
450 if (avresample_available(encoder->resampleContext) < encoder->audioFrame->nb_samples) {
451 return;
452 }
453#if LIBAVCODEC_VERSION_MAJOR >= 55
454 av_frame_make_writable(encoder->audioFrame);
455#endif
456 int samples = avresample_read(encoder->resampleContext, encoder->audioFrame->data, encoder->postaudioBufferSize / channelSize);
457#else
458#if LIBAVCODEC_VERSION_MAJOR >= 55
459 av_frame_make_writable(encoder->audioFrame);
460#endif
461 if (swr_get_out_samples(encoder->resampleContext, encoder->audioBufferSize / 4) < encoder->audioFrame->nb_samples) {
462 swr_convert(encoder->resampleContext, NULL, 0, (const uint8_t**) &encoder->audioBuffer, encoder->audioBufferSize / 4);
463 return;
464 }
465 int samples = swr_convert(encoder->resampleContext, encoder->audioFrame->data, encoder->postaudioBufferSize / channelSize,
466 (const uint8_t**) &encoder->audioBuffer, encoder->audioBufferSize / 4);
467#endif
468
469 encoder->audioFrame->pts = av_rescale_q(encoder->currentAudioFrame, encoder->audio->time_base, encoder->audioStream->time_base);
470 encoder->currentAudioFrame += samples;
471
472 AVPacket packet;
473 av_init_packet(&packet);
474 packet.data = 0;
475 packet.size = 0;
476 packet.pts = encoder->audioFrame->pts;
477
478 int gotData;
479#ifdef FFMPEG_USE_PACKETS
480 avcodec_send_frame(encoder->audio, encoder->audioFrame);
481 gotData = avcodec_receive_packet(encoder->audio, &packet);
482 gotData = (gotData == 0) && packet.size;
483#else
484 avcodec_encode_audio2(encoder->audio, &packet, encoder->audioFrame, &gotData);
485#endif
486 if (gotData) {
487 if (encoder->absf) {
488 AVPacket tempPacket;
489
490#ifdef FFMPEG_USE_NEW_BSF
491 int success = av_bsf_send_packet(encoder->absf, &packet);
492 if (success >= 0) {
493 success = av_bsf_receive_packet(encoder->absf, &tempPacket);
494 }
495#else
496 int success = av_bitstream_filter_filter(encoder->absf, encoder->audio, 0,
497 &tempPacket.data, &tempPacket.size,
498 packet.data, packet.size, 0);
499#endif
500
501 if (success >= 0) {
502#if LIBAVUTIL_VERSION_MAJOR >= 53
503 tempPacket.buf = av_buffer_create(tempPacket.data, tempPacket.size, av_buffer_default_free, 0, 0);
504#endif
505
506#ifdef FFMPEG_USE_PACKET_UNREF
507 av_packet_move_ref(&packet, &tempPacket);
508#else
509 av_free_packet(&packet);
510 packet = tempPacket;
511#endif
512
513 packet.stream_index = encoder->audioStream->index;
514 av_interleaved_write_frame(encoder->context, &packet);
515 }
516 } else {
517 packet.stream_index = encoder->audioStream->index;
518 av_interleaved_write_frame(encoder->context, &packet);
519 }
520 }
521#ifdef FFMPEG_USE_PACKET_UNREF
522 av_packet_unref(&packet);
523#else
524 av_free_packet(&packet);
525#endif
526}
527
528void _ffmpegPostVideoFrame(struct mAVStream* stream, const color_t* pixels, size_t stride) {
529 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
530 if (!encoder->context) {
531 return;
532 }
533 stride *= BYTES_PER_PIXEL;
534
535 AVPacket packet;
536
537 av_init_packet(&packet);
538 packet.data = 0;
539 packet.size = 0;
540#if LIBAVCODEC_VERSION_MAJOR >= 55
541 av_frame_make_writable(encoder->videoFrame);
542#endif
543 encoder->videoFrame->pts = av_rescale_q(encoder->currentVideoFrame, encoder->video->time_base, encoder->videoStream->time_base);
544 packet.pts = encoder->videoFrame->pts;
545 ++encoder->currentVideoFrame;
546
547 sws_scale(encoder->scaleContext, (const uint8_t* const*) &pixels, (const int*) &stride, 0, encoder->iheight, encoder->videoFrame->data, encoder->videoFrame->linesize);
548
549 int gotData;
550#ifdef FFMPEG_USE_PACKETS
551 avcodec_send_frame(encoder->video, encoder->videoFrame);
552 gotData = avcodec_receive_packet(encoder->video, &packet) == 0;
553#else
554 avcodec_encode_video2(encoder->video, &packet, encoder->videoFrame, &gotData);
555#endif
556 if (gotData) {
557#ifndef FFMPEG_USE_PACKET_UNREF
558 if (encoder->video->coded_frame->key_frame) {
559 packet.flags |= AV_PKT_FLAG_KEY;
560 }
561#endif
562 packet.stream_index = encoder->videoStream->index;
563 av_interleaved_write_frame(encoder->context, &packet);
564 }
565#ifdef FFMPEG_USE_PACKET_UNREF
566 av_packet_unref(&packet);
567#else
568 av_free_packet(&packet);
569#endif
570}
571
572static void _ffmpegSetVideoDimensions(struct mAVStream* stream, unsigned width, unsigned height) {
573 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
574 encoder->iwidth = width;
575 encoder->iheight = height;
576 if (encoder->video) {
577 if (encoder->scaleContext) {
578 sws_freeContext(encoder->scaleContext);
579 }
580 encoder->scaleContext = sws_getContext(encoder->iwidth, encoder->iheight,
581#ifdef COLOR_16_BIT
582#ifdef COLOR_5_6_5
583 AV_PIX_FMT_RGB565,
584#else
585 AV_PIX_FMT_BGR555,
586#endif
587#else
588#ifndef USE_LIBAV
589 AV_PIX_FMT_0BGR32,
590#else
591 AV_PIX_FMT_BGR32,
592#endif
593#endif
594 encoder->videoFrame->width, encoder->videoFrame->height, encoder->video->pix_fmt,
595 SWS_POINT, 0, 0, 0);
596 }
597}
598
599static void _ffmpegSetVideoFrameRate(struct mAVStream* stream, unsigned numerator, unsigned denominator) {
600 struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
601 FFmpegEncoderSetInputFrameRate(encoder, numerator, denominator);
602}
603
604void FFmpegEncoderSetInputFrameRate(struct FFmpegEncoder* encoder, unsigned numerator, unsigned denominator) {
605 encoder->frameCycles = numerator;
606 encoder->cycles = denominator;
607 if (encoder->video) {
608 encoder->video->time_base = (AVRational) { numerator, denominator };
609 }
610}