Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavdevice / decklink_enc.cpp
1 /*
2 * Blackmagic DeckLink output
3 * Copyright (c) 2013-2014 Ramiro Polla
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <DeckLinkAPI.h>
23
24 #include <pthread.h>
25 #include <semaphore.h>
26
27 extern "C" {
28 #include "libavformat/avformat.h"
29 #include "libavformat/internal.h"
30 #include "libavutil/imgutils.h"
31 }
32
33 #include "decklink_common.h"
34 #include "decklink_enc.h"
35
36
37 /* DeckLink callback class declaration */
38 class decklink_frame : public IDeckLinkVideoFrame
39 {
40 public:
41 decklink_frame(struct decklink_ctx *ctx, AVFrame *avframe, long width,
42 long height, void *buffer) :
43 _ctx(ctx), _avframe(avframe), _width(width),
44 _height(height), _buffer(buffer), _refs(0) { }
45
46 virtual long STDMETHODCALLTYPE GetWidth (void) { return _width; }
47 virtual long STDMETHODCALLTYPE GetHeight (void) { return _height; }
48 virtual long STDMETHODCALLTYPE GetRowBytes (void) { return _width<<1; }
49 virtual BMDPixelFormat STDMETHODCALLTYPE GetPixelFormat(void) { return bmdFormat8BitYUV; }
50 virtual BMDFrameFlags STDMETHODCALLTYPE GetFlags (void) { return bmdVideoOutputFlagDefault; }
51 virtual HRESULT STDMETHODCALLTYPE GetBytes (void **buffer) { *buffer = _buffer; return S_OK; }
52
53 virtual HRESULT STDMETHODCALLTYPE GetTimecode (BMDTimecodeFormat format, IDeckLinkTimecode **timecode) { return S_FALSE; }
54 virtual HRESULT STDMETHODCALLTYPE GetAncillaryData(IDeckLinkVideoFrameAncillary **ancillary) { return S_FALSE; }
55
56 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
57 virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; }
58 virtual ULONG STDMETHODCALLTYPE Release(void) { if (!--_refs) delete this; return _refs; }
59
60 struct decklink_ctx *_ctx;
61 AVFrame *_avframe;
62
63 private:
64 long _width;
65 long _height;
66 void *_buffer;
67 int _refs;
68 };
69
70 class decklink_output_callback : public IDeckLinkVideoOutputCallback
71 {
72 public:
73 virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted(IDeckLinkVideoFrame *_frame, BMDOutputFrameCompletionResult result)
74 {
75 decklink_frame *frame = static_cast<decklink_frame *>(_frame);
76 struct decklink_ctx *ctx = frame->_ctx;
77 AVFrame *avframe = frame->_avframe;
78
79 av_frame_free(&avframe);
80
81 sem_post(&ctx->semaphore);
82
83 return S_OK;
84 }
85 virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped(void) { return S_OK; }
86 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
87 virtual ULONG STDMETHODCALLTYPE AddRef(void) { return 1; }
88 virtual ULONG STDMETHODCALLTYPE Release(void) { return 1; }
89 };
90
91 static int decklink_setup_video(AVFormatContext *avctx, AVStream *st)
92 {
93 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
94 struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
95 AVCodecContext *c = st->codec;
96
97 if (ctx->video) {
98 av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n");
99 return -1;
100 }
101
102 if (c->pix_fmt != AV_PIX_FMT_UYVY422) {
103 av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!"
104 " Only AV_PIX_FMT_UYVY422 is supported.\n");
105 return -1;
106 }
107 if (ff_decklink_set_format(avctx, c->width, c->height,
108 c->time_base.num, c->time_base.den)) {
109 av_log(avctx, AV_LOG_ERROR, "Unsupported video size or framerate!"
110 " Check available formats with -list_formats 1.\n");
111 return -1;
112 }
113 if (ctx->dlo->EnableVideoOutput(ctx->bmd_mode,
114 bmdVideoOutputFlagDefault) != S_OK) {
115 av_log(avctx, AV_LOG_ERROR, "Could not enable video output!\n");
116 return -1;
117 }
118
119 /* Set callback. */
120 ctx->output_callback = new decklink_output_callback();
121 ctx->dlo->SetScheduledFrameCompletionCallback(ctx->output_callback);
122
123 /* Start video semaphore. */
124 ctx->frames_preroll = c->time_base.den * ctx->preroll;
125 if (c->time_base.den > 1000)
126 ctx->frames_preroll /= 1000;
127
128 /* Buffer twice as many frames as the preroll. */
129 ctx->frames_buffer = ctx->frames_preroll * 2;
130 ctx->frames_buffer = FFMIN(ctx->frames_buffer, 60);
131 sem_init(&ctx->semaphore, 0, ctx->frames_buffer);
132
133 /* The device expects the framerate to be fixed. */
134 avpriv_set_pts_info(st, 64, c->time_base.num, c->time_base.den);
135
136 ctx->video = 1;
137
138 return 0;
139 }
140
141 static int decklink_setup_audio(AVFormatContext *avctx, AVStream *st)
142 {
143 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
144 struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
145 AVCodecContext *c = st->codec;
146
147 if (ctx->audio) {
148 av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n");
149 return -1;
150 }
151 if (c->sample_rate != 48000) {
152 av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate!"
153 " Only 48kHz is supported.\n");
154 return -1;
155 }
156 if (c->channels != 2 && c->channels != 8) {
157 av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels!"
158 " Only stereo and 7.1 are supported.\n");
159 return -1;
160 }
161 if (ctx->dlo->EnableAudioOutput(bmdAudioSampleRate48kHz,
162 bmdAudioSampleType16bitInteger,
163 c->channels,
164 bmdAudioOutputStreamTimestamped) != S_OK) {
165 av_log(avctx, AV_LOG_ERROR, "Could not enable audio output!\n");
166 return -1;
167 }
168 if (ctx->dlo->BeginAudioPreroll() != S_OK) {
169 av_log(avctx, AV_LOG_ERROR, "Could not begin audio preroll!\n");
170 return -1;
171 }
172
173 /* The device expects the sample rate to be fixed. */
174 avpriv_set_pts_info(st, 64, 1, c->sample_rate);
175 ctx->channels = c->channels;
176
177 ctx->audio = 1;
178
179 return 0;
180 }
181
182 av_cold int ff_decklink_write_trailer(AVFormatContext *avctx)
183 {
184 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
185 struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
186
187 if (ctx->playback_started) {
188 BMDTimeValue actual;
189 ctx->dlo->StopScheduledPlayback(ctx->last_pts * ctx->bmd_tb_num,
190 &actual, ctx->bmd_tb_den);
191 ctx->dlo->DisableVideoOutput();
192 if (ctx->audio)
193 ctx->dlo->DisableAudioOutput();
194 }
195
196 if (ctx->dlo)
197 ctx->dlo->Release();
198 if (ctx->dl)
199 ctx->dl->Release();
200
201 if (ctx->output_callback)
202 delete ctx->output_callback;
203
204 sem_destroy(&ctx->semaphore);
205
206 av_freep(&cctx->ctx);
207
208 return 0;
209 }
210
211 static int decklink_write_video_packet(AVFormatContext *avctx, AVPacket *pkt)
212 {
213 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
214 struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
215 AVPicture *avpicture = (AVPicture *) pkt->data;
216 AVFrame *avframe, *tmp;
217 decklink_frame *frame;
218 buffercount_type buffered;
219 HRESULT hr;
220
221 /* HACK while av_uncoded_frame() isn't implemented */
222 int ret;
223
224 tmp = av_frame_alloc();
225 if (!tmp)
226 return AVERROR(ENOMEM);
227 tmp->format = AV_PIX_FMT_UYVY422;
228 tmp->width = ctx->bmd_width;
229 tmp->height = ctx->bmd_height;
230 ret = av_frame_get_buffer(tmp, 32);
231 if (ret < 0) {
232 av_frame_free(&tmp);
233 return ret;
234 }
235 av_image_copy(tmp->data, tmp->linesize, (const uint8_t **) avpicture->data,
236 avpicture->linesize, (AVPixelFormat) tmp->format, tmp->width,
237 tmp->height);
238 avframe = av_frame_clone(tmp);
239 av_frame_free(&tmp);
240 if (!avframe) {
241 av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n");
242 return AVERROR(EIO);
243 }
244 /* end HACK */
245
246 frame = new decklink_frame(ctx, avframe, ctx->bmd_width, ctx->bmd_height,
247 (void *) avframe->data[0]);
248 if (!frame) {
249 av_log(avctx, AV_LOG_ERROR, "Could not create new frame.\n");
250 return AVERROR(EIO);
251 }
252
253 /* Always keep at most one second of frames buffered. */
254 sem_wait(&ctx->semaphore);
255
256 /* Schedule frame for playback. */
257 hr = ctx->dlo->ScheduleVideoFrame((struct IDeckLinkVideoFrame *) frame,
258 pkt->pts * ctx->bmd_tb_num,
259 ctx->bmd_tb_num, ctx->bmd_tb_den);
260 if (hr != S_OK) {
261 av_log(avctx, AV_LOG_ERROR, "Could not schedule video frame."
262 " error %08x.\n", (uint32_t) hr);
263 frame->Release();
264 return AVERROR(EIO);
265 }
266
267 ctx->dlo->GetBufferedVideoFrameCount(&buffered);
268 av_log(avctx, AV_LOG_DEBUG, "Buffered video frames: %d.\n", (int) buffered);
269 if (pkt->pts > 2 && buffered <= 2)
270 av_log(avctx, AV_LOG_WARNING, "There are not enough buffered video frames."
271 " Video may misbehave!\n");
272
273 /* Preroll video frames. */
274 if (!ctx->playback_started && pkt->pts > ctx->frames_preroll) {
275 av_log(avctx, AV_LOG_DEBUG, "Ending audio preroll.\n");
276 if (ctx->audio && ctx->dlo->EndAudioPreroll() != S_OK) {
277 av_log(avctx, AV_LOG_ERROR, "Could not end audio preroll!\n");
278 return AVERROR(EIO);
279 }
280 av_log(avctx, AV_LOG_DEBUG, "Starting scheduled playback.\n");
281 if (ctx->dlo->StartScheduledPlayback(0, ctx->bmd_tb_den, 1.0) != S_OK) {
282 av_log(avctx, AV_LOG_ERROR, "Could not start scheduled playback!\n");
283 return AVERROR(EIO);
284 }
285 ctx->playback_started = 1;
286 }
287
288 return 0;
289 }
290
291 static int decklink_write_audio_packet(AVFormatContext *avctx, AVPacket *pkt)
292 {
293 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
294 struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
295 int sample_count = pkt->size / (ctx->channels << 1);
296 buffercount_type buffered;
297
298 ctx->dlo->GetBufferedAudioSampleFrameCount(&buffered);
299 if (pkt->pts > 1 && !buffered)
300 av_log(avctx, AV_LOG_WARNING, "There's no buffered audio."
301 " Audio will misbehave!\n");
302
303 if (ctx->dlo->ScheduleAudioSamples(pkt->data, sample_count, pkt->pts,
304 bmdAudioSampleRate48kHz, NULL) != S_OK) {
305 av_log(avctx, AV_LOG_ERROR, "Could not schedule audio samples.\n");
306 return AVERROR(EIO);
307 }
308
309 return 0;
310 }
311
312 extern "C" {
313
314 av_cold int ff_decklink_write_header(AVFormatContext *avctx)
315 {
316 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
317 struct decklink_ctx *ctx;
318 IDeckLinkDisplayModeIterator *itermode;
319 IDeckLinkIterator *iter;
320 IDeckLink *dl = NULL;
321 unsigned int n;
322
323 ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));
324 if (!ctx)
325 return AVERROR(ENOMEM);
326 ctx->list_devices = cctx->list_devices;
327 ctx->list_formats = cctx->list_formats;
328 ctx->preroll = cctx->preroll;
329 cctx->ctx = ctx;
330
331 iter = CreateDeckLinkIteratorInstance();
332 if (!iter) {
333 av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
334 return AVERROR(EIO);
335 }
336
337 /* List available devices. */
338 if (ctx->list_devices) {
339 ff_decklink_list_devices(avctx);
340 return AVERROR_EXIT;
341 }
342
343 /* Open device. */
344 while (iter->Next(&dl) == S_OK) {
345 const char *displayName;
346 ff_decklink_get_display_name(dl, &displayName);
347 if (!strcmp(avctx->filename, displayName)) {
348 av_free((void *) displayName);
349 ctx->dl = dl;
350 break;
351 }
352 av_free((void *) displayName);
353 dl->Release();
354 }
355 iter->Release();
356 if (!ctx->dl) {
357 av_log(avctx, AV_LOG_ERROR, "Could not open '%s'\n", avctx->filename);
358 return AVERROR(EIO);
359 }
360
361 /* Get output device. */
362 if (ctx->dl->QueryInterface(IID_IDeckLinkOutput, (void **) &ctx->dlo) != S_OK) {
363 av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n",
364 avctx->filename);
365 ctx->dl->Release();
366 return AVERROR(EIO);
367 }
368
369 /* List supported formats. */
370 if (ctx->list_formats) {
371 ff_decklink_list_formats(avctx);
372 ctx->dlo->Release();
373 ctx->dl->Release();
374 return AVERROR_EXIT;
375 }
376
377 if (ctx->dlo->GetDisplayModeIterator(&itermode) != S_OK) {
378 av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
379 ctx->dl->Release();
380 return AVERROR(EIO);
381 }
382
383 /* Setup streams. */
384 for (n = 0; n < avctx->nb_streams; n++) {
385 AVStream *st = avctx->streams[n];
386 AVCodecContext *c = st->codec;
387 if (c->codec_type == AVMEDIA_TYPE_AUDIO) {
388 if (decklink_setup_audio(avctx, st))
389 goto error;
390 } else if (c->codec_type == AVMEDIA_TYPE_VIDEO) {
391 if (decklink_setup_video(avctx, st))
392 goto error;
393 } else {
394 av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n");
395 goto error;
396 }
397 }
398 itermode->Release();
399
400 return 0;
401
402 error:
403
404 ctx->dlo->Release();
405 ctx->dl->Release();
406
407 return AVERROR(EIO);
408 }
409
410 int ff_decklink_write_packet(AVFormatContext *avctx, AVPacket *pkt)
411 {
412 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
413 struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
414 AVStream *st = avctx->streams[pkt->stream_index];
415
416 ctx->last_pts = FFMAX(ctx->last_pts, pkt->pts);
417
418 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
419 return decklink_write_video_packet(avctx, pkt);
420 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
421 return decklink_write_audio_packet(avctx, pkt);
422
423 return AVERROR(EIO);
424 }
425
426 } /* extern "C" */