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libstagefright.cpp
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1 /*
2  * Interface to the Android Stagefright library for
3  * H/W accelerated H.264 decoding
4  *
5  * Copyright (C) 2011 Mohamed Naufal
6  * Copyright (C) 2011 Martin Storsj√∂
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include <binder/ProcessState.h>
26 #include <media/stagefright/MetaData.h>
27 #include <media/stagefright/MediaBufferGroup.h>
28 #include <media/stagefright/MediaDebug.h>
29 #include <media/stagefright/MediaDefs.h>
30 #include <media/stagefright/OMXClient.h>
31 #include <media/stagefright/OMXCodec.h>
32 #include <utils/List.h>
33 #include <new>
34 #include <map>
35 
36 extern "C" {
37 #include "avcodec.h"
38 #include "libavutil/imgutils.h"
39 #include "internal.h"
40 }
41 
42 #define OMX_QCOM_COLOR_FormatYVU420SemiPlanar 0x7FA30C00
43 
44 using namespace android;
45 
46 struct Frame {
47  status_t status;
48  size_t size;
49  int64_t time;
50  int key;
53 };
54 
55 struct TimeStamp {
56  int64_t pts;
58 };
59 
60 class CustomSource;
61 
67  sp<MediaSource> *source;
68  List<Frame*> *in_queue, *out_queue;
72 
75  volatile sig_atomic_t thread_started, thread_exited, stop_decode;
76 
78  std::map<int64_t, TimeStamp> *ts_map;
79  int64_t frame_index;
80 
83 
84  OMXClient *client;
85  sp<MediaSource> *decoder;
86  const char *decoder_component;
87 };
88 
89 class CustomSource : public MediaSource {
90 public:
91  CustomSource(AVCodecContext *avctx, sp<MetaData> meta) {
92  s = (StagefrightContext*)avctx->priv_data;
93  source_meta = meta;
94  frame_size = (avctx->width * avctx->height * 3) / 2;
95  buf_group.add_buffer(new MediaBuffer(frame_size));
96  }
97 
98  virtual sp<MetaData> getFormat() {
99  return source_meta;
100  }
101 
102  virtual status_t start(MetaData *params) {
103  return OK;
104  }
105 
106  virtual status_t stop() {
107  return OK;
108  }
109 
110  virtual status_t read(MediaBuffer **buffer,
111  const MediaSource::ReadOptions *options) {
112  Frame *frame;
113  status_t ret;
114 
115  if (s->thread_exited)
116  return ERROR_END_OF_STREAM;
117  pthread_mutex_lock(&s->in_mutex);
118 
119  while (s->in_queue->empty())
120  pthread_cond_wait(&s->condition, &s->in_mutex);
121 
122  frame = *s->in_queue->begin();
123  ret = frame->status;
124 
125  if (ret == OK) {
126  ret = buf_group.acquire_buffer(buffer);
127  if (ret == OK) {
128  memcpy((*buffer)->data(), frame->buffer, frame->size);
129  (*buffer)->set_range(0, frame->size);
130  (*buffer)->meta_data()->clear();
131  (*buffer)->meta_data()->setInt32(kKeyIsSyncFrame,frame->key);
132  (*buffer)->meta_data()->setInt64(kKeyTime, frame->time);
133  } else {
134  av_log(s->avctx, AV_LOG_ERROR, "Failed to acquire MediaBuffer\n");
135  }
136  av_freep(&frame->buffer);
137  }
138 
139  s->in_queue->erase(s->in_queue->begin());
140  pthread_mutex_unlock(&s->in_mutex);
141 
142  av_freep(&frame);
143  return ret;
144  }
145 
146 private:
147  MediaBufferGroup buf_group;
148  sp<MetaData> source_meta;
151 };
152 
153 void* decode_thread(void *arg)
154 {
155  AVCodecContext *avctx = (AVCodecContext*)arg;
157  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(avctx->pix_fmt);
158  Frame* frame;
159  MediaBuffer *buffer;
160  int32_t w, h;
161  int decode_done = 0;
162  int ret;
163  int src_linesize[3];
164  const uint8_t *src_data[3];
165  int64_t out_frame_index = 0;
166 
167  do {
168  buffer = NULL;
169  frame = (Frame*)av_mallocz(sizeof(Frame));
170  if (!frame) {
171  frame = s->end_frame;
172  frame->status = AVERROR(ENOMEM);
173  decode_done = 1;
174  s->end_frame = NULL;
175  goto push_frame;
176  }
177  frame->status = (*s->decoder)->read(&buffer);
178  if (frame->status == OK) {
179  sp<MetaData> outFormat = (*s->decoder)->getFormat();
180  outFormat->findInt32(kKeyWidth , &w);
181  outFormat->findInt32(kKeyHeight, &h);
182  frame->vframe = av_frame_alloc();
183  if (!frame->vframe) {
184  frame->status = AVERROR(ENOMEM);
185  decode_done = 1;
186  buffer->release();
187  goto push_frame;
188  }
189  ret = ff_get_buffer(avctx, frame->vframe, AV_GET_BUFFER_FLAG_REF);
190  if (ret < 0) {
191  frame->status = ret;
192  decode_done = 1;
193  buffer->release();
194  goto push_frame;
195  }
196 
197  // The OMX.SEC decoder doesn't signal the modified width/height
198  if (s->decoder_component && !strncmp(s->decoder_component, "OMX.SEC", 7) &&
199  (w & 15 || h & 15)) {
200  if (((w + 15)&~15) * ((h + 15)&~15) * 3/2 == buffer->range_length()) {
201  w = (w + 15)&~15;
202  h = (h + 15)&~15;
203  }
204  }
205 
206  if (!avctx->width || !avctx->height || avctx->width > w || avctx->height > h) {
207  avctx->width = w;
208  avctx->height = h;
209  }
210 
211  src_linesize[0] = av_image_get_linesize(avctx->pix_fmt, w, 0);
212  src_linesize[1] = av_image_get_linesize(avctx->pix_fmt, w, 1);
213  src_linesize[2] = av_image_get_linesize(avctx->pix_fmt, w, 2);
214 
215  src_data[0] = (uint8_t*)buffer->data();
216  src_data[1] = src_data[0] + src_linesize[0] * h;
217  src_data[2] = src_data[1] + src_linesize[1] * -(-h>>pix_desc->log2_chroma_h);
218  av_image_copy(frame->vframe->data, frame->vframe->linesize,
219  src_data, src_linesize,
220  avctx->pix_fmt, avctx->width, avctx->height);
221 
222  buffer->meta_data()->findInt64(kKeyTime, &out_frame_index);
223  if (out_frame_index && s->ts_map->count(out_frame_index) > 0) {
224  frame->vframe->pts = (*s->ts_map)[out_frame_index].pts;
225  frame->vframe->reordered_opaque = (*s->ts_map)[out_frame_index].reordered_opaque;
226  s->ts_map->erase(out_frame_index);
227  }
228  buffer->release();
229  } else if (frame->status == INFO_FORMAT_CHANGED) {
230  if (buffer)
231  buffer->release();
232  av_free(frame);
233  continue;
234  } else {
235  decode_done = 1;
236  }
237 push_frame:
238  while (true) {
240  if (s->out_queue->size() >= 10) {
242  usleep(10000);
243  continue;
244  }
245  break;
246  }
247  s->out_queue->push_back(frame);
249  } while (!decode_done && !s->stop_decode);
250 
251  s->thread_exited = true;
252 
253  return 0;
254 }
255 
257 {
259  sp<MetaData> meta, outFormat;
260  int32_t colorFormat = 0;
261  int ret;
262 
263  if (!avctx->extradata || !avctx->extradata_size || avctx->extradata[0] != 1)
264  return -1;
265 
266  s->avctx = avctx;
267  s->bsfc = av_bitstream_filter_init("h264_mp4toannexb");
268  if (!s->bsfc) {
269  av_log(avctx, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
270  return -1;
271  }
272 
276  if (!s->orig_extradata) {
277  ret = AVERROR(ENOMEM);
278  goto fail;
279  }
280  memcpy(s->orig_extradata, avctx->extradata, avctx->extradata_size);
281 
282  meta = new MetaData;
283  if (!meta) {
284  ret = AVERROR(ENOMEM);
285  goto fail;
286  }
287  meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC);
288  meta->setInt32(kKeyWidth, avctx->width);
289  meta->setInt32(kKeyHeight, avctx->height);
290  meta->setData(kKeyAVCC, kTypeAVCC, avctx->extradata, avctx->extradata_size);
291 
292  android::ProcessState::self()->startThreadPool();
293 
294  s->source = new sp<MediaSource>();
295  *s->source = new CustomSource(avctx, meta);
296  s->in_queue = new List<Frame*>;
297  s->out_queue = new List<Frame*>;
298  s->ts_map = new std::map<int64_t, TimeStamp>;
299  s->client = new OMXClient;
300  s->end_frame = (Frame*)av_mallocz(sizeof(Frame));
301  if (s->source == NULL || !s->in_queue || !s->out_queue || !s->client ||
302  !s->ts_map || !s->end_frame) {
303  ret = AVERROR(ENOMEM);
304  goto fail;
305  }
306 
307  if (s->client->connect() != OK) {
308  av_log(avctx, AV_LOG_ERROR, "Cannot connect OMX client\n");
309  ret = -1;
310  goto fail;
311  }
312 
313  s->decoder = new sp<MediaSource>();
314  *s->decoder = OMXCodec::Create(s->client->interface(), meta,
315  false, *s->source, NULL,
316  OMXCodec::kClientNeedsFramebuffer);
317  if ((*s->decoder)->start() != OK) {
318  av_log(avctx, AV_LOG_ERROR, "Cannot start decoder\n");
319  ret = -1;
320  s->client->disconnect();
321  goto fail;
322  }
323 
324  outFormat = (*s->decoder)->getFormat();
325  outFormat->findInt32(kKeyColorFormat, &colorFormat);
326  if (colorFormat == OMX_QCOM_COLOR_FormatYVU420SemiPlanar ||
327  colorFormat == OMX_COLOR_FormatYUV420SemiPlanar)
328  avctx->pix_fmt = AV_PIX_FMT_NV21;
329  else if (colorFormat == OMX_COLOR_FormatYCbYCr)
330  avctx->pix_fmt = AV_PIX_FMT_YUYV422;
331  else if (colorFormat == OMX_COLOR_FormatCbYCrY)
332  avctx->pix_fmt = AV_PIX_FMT_UYVY422;
333  else
334  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
335 
336  outFormat->findCString(kKeyDecoderComponent, &s->decoder_component);
337  if (s->decoder_component)
339 
340  pthread_mutex_init(&s->in_mutex, NULL);
341  pthread_mutex_init(&s->out_mutex, NULL);
342  pthread_cond_init(&s->condition, NULL);
343  return 0;
344 
345 fail:
348  av_freep(&s->end_frame);
349  delete s->in_queue;
350  delete s->out_queue;
351  delete s->ts_map;
352  delete s->client;
353  return ret;
354 }
355 
357  int *got_frame, AVPacket *avpkt)
358 {
360  Frame *frame;
361  status_t status;
362  int orig_size = avpkt->size;
363  AVPacket pkt = *avpkt;
364  AVFrame *ret_frame;
365 
366  if (!s->thread_started) {
367  pthread_create(&s->decode_thread_id, NULL, &decode_thread, avctx);
368  s->thread_started = true;
369  }
370 
371  if (avpkt && avpkt->data) {
372  av_bitstream_filter_filter(s->bsfc, avctx, NULL, &pkt.data, &pkt.size,
373  avpkt->data, avpkt->size, avpkt->flags & AV_PKT_FLAG_KEY);
374  avpkt = &pkt;
375  }
376 
377  if (!s->source_done) {
378  if(!s->dummy_buf) {
379  s->dummy_buf = (uint8_t*)av_malloc(avpkt->size);
380  if (!s->dummy_buf)
381  return AVERROR(ENOMEM);
382  s->dummy_bufsize = avpkt->size;
383  memcpy(s->dummy_buf, avpkt->data, avpkt->size);
384  }
385 
386  frame = (Frame*)av_mallocz(sizeof(Frame));
387  if (avpkt->data) {
388  frame->status = OK;
389  frame->size = avpkt->size;
390  frame->key = avpkt->flags & AV_PKT_FLAG_KEY ? 1 : 0;
391  frame->buffer = (uint8_t*)av_malloc(avpkt->size);
392  if (!frame->buffer) {
393  av_freep(&frame);
394  return AVERROR(ENOMEM);
395  }
396  uint8_t *ptr = avpkt->data;
397  // The OMX.SEC decoder fails without this.
398  if (avpkt->size == orig_size + avctx->extradata_size) {
399  ptr += avctx->extradata_size;
400  frame->size = orig_size;
401  }
402  memcpy(frame->buffer, ptr, orig_size);
403  if (avpkt == &pkt)
404  av_free(avpkt->data);
405 
406  frame->time = ++s->frame_index;
407  (*s->ts_map)[s->frame_index].pts = avpkt->pts;
408  (*s->ts_map)[s->frame_index].reordered_opaque = avctx->reordered_opaque;
409  } else {
410  frame->status = ERROR_END_OF_STREAM;
411  s->source_done = true;
412  }
413 
414  while (true) {
415  if (s->thread_exited) {
416  s->source_done = true;
417  break;
418  }
420  if (s->in_queue->size() >= 10) {
422  usleep(10000);
423  continue;
424  }
425  s->in_queue->push_back(frame);
428  break;
429  }
430  }
431  while (true) {
433  if (!s->out_queue->empty()) break;
435  if (s->source_done) {
436  usleep(10000);
437  continue;
438  } else {
439  return orig_size;
440  }
441  }
442 
443  frame = *s->out_queue->begin();
444  s->out_queue->erase(s->out_queue->begin());
446 
447  ret_frame = frame->vframe;
448  status = frame->status;
449  av_freep(&frame);
450 
451  if (status == ERROR_END_OF_STREAM)
452  return 0;
453  if (status != OK) {
454  if (status == AVERROR(ENOMEM))
455  return status;
456  av_log(avctx, AV_LOG_ERROR, "Decode failed: %x\n", status);
457  return -1;
458  }
459 
460  if (s->prev_frame)
462  s->prev_frame = ret_frame;
463 
464  *got_frame = 1;
465  *(AVFrame*)data = *ret_frame;
466  return orig_size;
467 }
468 
470 {
472  Frame *frame;
473 
474  if (s->thread_started) {
475  if (!s->thread_exited) {
476  s->stop_decode = 1;
477 
478  // Make sure decode_thread() doesn't get stuck
480  while (!s->out_queue->empty()) {
481  frame = *s->out_queue->begin();
482  s->out_queue->erase(s->out_queue->begin());
483  if (frame->vframe)
484  av_frame_free(&frame->vframe);
485  av_freep(&frame);
486  }
488 
489  // Feed a dummy frame prior to signalling EOF.
490  // This is required to terminate the decoder(OMX.SEC)
491  // when only one frame is read during stream info detection.
492  if (s->dummy_buf && (frame = (Frame*)av_mallocz(sizeof(Frame)))) {
493  frame->status = OK;
494  frame->size = s->dummy_bufsize;
495  frame->key = 1;
496  frame->buffer = s->dummy_buf;
498  s->in_queue->push_back(frame);
501  s->dummy_buf = NULL;
502  }
503 
505  s->end_frame->status = ERROR_END_OF_STREAM;
506  s->in_queue->push_back(s->end_frame);
509  s->end_frame = NULL;
510  }
511 
512  pthread_join(s->decode_thread_id, NULL);
513 
514  if (s->prev_frame)
516 
517  s->thread_started = false;
518  }
519 
520  while (!s->in_queue->empty()) {
521  frame = *s->in_queue->begin();
522  s->in_queue->erase(s->in_queue->begin());
523  if (frame->size)
524  av_freep(&frame->buffer);
525  av_freep(&frame);
526  }
527 
528  while (!s->out_queue->empty()) {
529  frame = *s->out_queue->begin();
530  s->out_queue->erase(s->out_queue->begin());
531  if (frame->vframe)
532  av_frame_free(&frame->vframe);
533  av_freep(&frame);
534  }
535 
536  (*s->decoder)->stop();
537  s->client->disconnect();
538 
539  if (s->decoder_component)
541  av_freep(&s->dummy_buf);
542  av_freep(&s->end_frame);
543 
544  // Reset the extradata back to the original mp4 format, so that
545  // the next invocation (both when decoding and when called from
546  // av_find_stream_info) get the original mp4 format extradata.
547  av_freep(&avctx->extradata);
548  avctx->extradata = s->orig_extradata;
550 
551  delete s->in_queue;
552  delete s->out_queue;
553  delete s->ts_map;
554  delete s->client;
555  delete s->decoder;
556  delete s->source;
557 
562  return 0;
563 }
564 
566  "libstagefright_h264",
567  NULL_IF_CONFIG_SMALL("libstagefright H.264"),
571  NULL, //supported_framerates
572  NULL, //pix_fmts
573  NULL, //supported_samplerates
574  NULL, //sample_fmts
575  NULL, //channel_layouts
576  0, //max_lowres
577  NULL, //priv_class
578  NULL, //profiles
579  sizeof(StagefrightContext),
580  NULL, //next
581  NULL, //init_thread_copy
582  NULL, //update_thread_context
583  NULL, //defaults
584  NULL, //init_static_data
586  NULL, //encode
587  NULL, //encode2
590 };