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path: root/libavcodec/mediacodecdec.c (plain)
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1/*
2 * Android MediaCodec H.264 / H.265 / MPEG-4 / VP8 / VP9 decoders
3 *
4 * Copyright (c) 2015-2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
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 <stdint.h>
24#include <string.h>
25
26#include "libavutil/avassert.h"
27#include "libavutil/common.h"
28#include "libavutil/fifo.h"
29#include "libavutil/opt.h"
30#include "libavutil/intreadwrite.h"
31#include "libavutil/pixfmt.h"
32
33#include "avcodec.h"
34#include "h264_parse.h"
35#include "hevc_parse.h"
36#include "internal.h"
37#include "mediacodec_wrapper.h"
38#include "mediacodecdec_common.h"
39
40typedef struct MediaCodecH264DecContext {
41
42 MediaCodecDecContext *ctx;
43
44 AVBSFContext *bsf;
45
46 AVFifoBuffer *fifo;
47
48 AVPacket filtered_pkt;
49
50} MediaCodecH264DecContext;
51
52static av_cold int mediacodec_decode_close(AVCodecContext *avctx)
53{
54 MediaCodecH264DecContext *s = avctx->priv_data;
55
56 ff_mediacodec_dec_close(avctx, s->ctx);
57 s->ctx = NULL;
58
59 av_fifo_free(s->fifo);
60
61 av_bsf_free(&s->bsf);
62 av_packet_unref(&s->filtered_pkt);
63
64 return 0;
65}
66
67#if CONFIG_H264_MEDIACODEC_DECODER || CONFIG_HEVC_MEDIACODEC_DECODER
68static int h2645_ps_to_nalu(const uint8_t *src, int src_size, uint8_t **out, int *out_size)
69{
70 int i;
71 int ret = 0;
72 uint8_t *p = NULL;
73 static const uint8_t nalu_header[] = { 0x00, 0x00, 0x00, 0x01 };
74
75 if (!out || !out_size) {
76 return AVERROR(EINVAL);
77 }
78
79 p = av_malloc(sizeof(nalu_header) + src_size);
80 if (!p) {
81 return AVERROR(ENOMEM);
82 }
83
84 *out = p;
85 *out_size = sizeof(nalu_header) + src_size;
86
87 memcpy(p, nalu_header, sizeof(nalu_header));
88 memcpy(p + sizeof(nalu_header), src, src_size);
89
90 /* Escape 0x00, 0x00, 0x0{0-3} pattern */
91 for (i = 4; i < *out_size; i++) {
92 if (i < *out_size - 3 &&
93 p[i + 0] == 0 &&
94 p[i + 1] == 0 &&
95 p[i + 2] <= 3) {
96 uint8_t *new;
97
98 *out_size += 1;
99 new = av_realloc(*out, *out_size);
100 if (!new) {
101 ret = AVERROR(ENOMEM);
102 goto done;
103 }
104 *out = p = new;
105
106 i = i + 2;
107 memmove(p + i + 1, p + i, *out_size - (i + 1));
108 p[i] = 0x03;
109 }
110 }
111done:
112 if (ret < 0) {
113 av_freep(out);
114 *out_size = 0;
115 }
116
117 return ret;
118}
119#endif
120
121#if CONFIG_H264_MEDIACODEC_DECODER
122static int h264_set_extradata(AVCodecContext *avctx, FFAMediaFormat *format)
123{
124 int i;
125 int ret;
126
127 H264ParamSets ps;
128 const PPS *pps = NULL;
129 const SPS *sps = NULL;
130 int is_avc = 0;
131 int nal_length_size = 0;
132
133 memset(&ps, 0, sizeof(ps));
134
135 ret = ff_h264_decode_extradata(avctx->extradata, avctx->extradata_size,
136 &ps, &is_avc, &nal_length_size, 0, avctx);
137 if (ret < 0) {
138 goto done;
139 }
140
141 for (i = 0; i < MAX_PPS_COUNT; i++) {
142 if (ps.pps_list[i]) {
143 pps = (const PPS*)ps.pps_list[i]->data;
144 break;
145 }
146 }
147
148 if (pps) {
149 if (ps.sps_list[pps->sps_id]) {
150 sps = (const SPS*)ps.sps_list[pps->sps_id]->data;
151 }
152 }
153
154 if (pps && sps) {
155 uint8_t *data = NULL;
156 int data_size = 0;
157
158 if ((ret = h2645_ps_to_nalu(sps->data, sps->data_size, &data, &data_size)) < 0) {
159 goto done;
160 }
161 ff_AMediaFormat_setBuffer(format, "csd-0", (void*)data, data_size);
162 av_freep(&data);
163
164 if ((ret = h2645_ps_to_nalu(pps->data, pps->data_size, &data, &data_size)) < 0) {
165 goto done;
166 }
167 ff_AMediaFormat_setBuffer(format, "csd-1", (void*)data, data_size);
168 av_freep(&data);
169 } else {
170 av_log(avctx, AV_LOG_ERROR, "Could not extract PPS/SPS from extradata");
171 ret = AVERROR_INVALIDDATA;
172 }
173
174done:
175 ff_h264_ps_uninit(&ps);
176
177 return ret;
178}
179#endif
180
181#if CONFIG_HEVC_MEDIACODEC_DECODER
182static int hevc_set_extradata(AVCodecContext *avctx, FFAMediaFormat *format)
183{
184 int i;
185 int ret;
186
187 HEVCParamSets ps;
188
189 const HEVCVPS *vps = NULL;
190 const HEVCPPS *pps = NULL;
191 const HEVCSPS *sps = NULL;
192 int is_nalff = 0;
193 int nal_length_size = 0;
194
195 uint8_t *vps_data = NULL;
196 uint8_t *sps_data = NULL;
197 uint8_t *pps_data = NULL;
198 int vps_data_size = 0;
199 int sps_data_size = 0;
200 int pps_data_size = 0;
201
202 memset(&ps, 0, sizeof(ps));
203
204 ret = ff_hevc_decode_extradata(avctx->extradata, avctx->extradata_size,
205 &ps, &is_nalff, &nal_length_size, 0, avctx);
206 if (ret < 0) {
207 goto done;
208 }
209
210 for (i = 0; i < HEVC_MAX_VPS_COUNT; i++) {
211 if (ps.vps_list[i]) {
212 vps = (const HEVCVPS*)ps.vps_list[i]->data;
213 break;
214 }
215 }
216
217 for (i = 0; i < HEVC_MAX_PPS_COUNT; i++) {
218 if (ps.pps_list[i]) {
219 pps = (const HEVCPPS*)ps.pps_list[i]->data;
220 break;
221 }
222 }
223
224 if (pps) {
225 if (ps.sps_list[pps->sps_id]) {
226 sps = (const HEVCSPS*)ps.sps_list[pps->sps_id]->data;
227 }
228 }
229
230 if (vps && pps && sps) {
231 uint8_t *data;
232 int data_size;
233
234 if ((ret = h2645_ps_to_nalu(vps->data, vps->data_size, &vps_data, &vps_data_size)) < 0 ||
235 (ret = h2645_ps_to_nalu(sps->data, sps->data_size, &sps_data, &sps_data_size)) < 0 ||
236 (ret = h2645_ps_to_nalu(pps->data, pps->data_size, &pps_data, &pps_data_size)) < 0) {
237 goto done;
238 }
239
240 data_size = vps_data_size + sps_data_size + pps_data_size;
241 data = av_mallocz(data_size);
242 if (!data) {
243 ret = AVERROR(ENOMEM);
244 goto done;
245 }
246
247 memcpy(data , vps_data, vps_data_size);
248 memcpy(data + vps_data_size , sps_data, sps_data_size);
249 memcpy(data + vps_data_size + sps_data_size, pps_data, pps_data_size);
250
251 ff_AMediaFormat_setBuffer(format, "csd-0", data, data_size);
252
253 av_freep(&data);
254 } else {
255 av_log(avctx, AV_LOG_ERROR, "Could not extract VPS/PPS/SPS from extradata");
256 ret = AVERROR_INVALIDDATA;
257 }
258
259done:
260 av_freep(&vps_data);
261 av_freep(&sps_data);
262 av_freep(&pps_data);
263
264 return ret;
265}
266#endif
267
268#if CONFIG_MPEG4_MEDIACODEC_DECODER
269static int mpeg4_set_extradata(AVCodecContext *avctx, FFAMediaFormat *format)
270{
271 int ret = 0;
272
273 if (avctx->extradata) {
274 ff_AMediaFormat_setBuffer(format, "csd-0", avctx->extradata, avctx->extradata_size);
275 }
276
277 return ret;
278}
279#endif
280
281#if CONFIG_VP8_MEDIACODEC_DECODER || CONFIG_VP9_MEDIACODEC_DECODER
282static int vpx_set_extradata(AVCodecContext *avctx, FFAMediaFormat *format)
283{
284 int ret = 0;
285
286 if (avctx->extradata) {
287 ff_AMediaFormat_setBuffer(format, "csd-0", avctx->extradata, avctx->extradata_size);
288 }
289
290 return ret;
291}
292#endif
293
294static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
295{
296 int ret;
297
298 const char *codec_mime = NULL;
299
300 const char *bsf_name = NULL;
301 const AVBitStreamFilter *bsf = NULL;
302
303 FFAMediaFormat *format = NULL;
304 MediaCodecH264DecContext *s = avctx->priv_data;
305
306 format = ff_AMediaFormat_new();
307 if (!format) {
308 av_log(avctx, AV_LOG_ERROR, "Failed to create media format\n");
309 ret = AVERROR_EXTERNAL;
310 goto done;
311 }
312
313 switch (avctx->codec_id) {
314#if CONFIG_H264_MEDIACODEC_DECODER
315 case AV_CODEC_ID_H264:
316 codec_mime = "video/avc";
317 bsf_name = "h264_mp4toannexb";
318
319 ret = h264_set_extradata(avctx, format);
320 if (ret < 0)
321 goto done;
322 break;
323#endif
324#if CONFIG_HEVC_MEDIACODEC_DECODER
325 case AV_CODEC_ID_HEVC:
326 codec_mime = "video/hevc";
327 bsf_name = "hevc_mp4toannexb";
328
329 ret = hevc_set_extradata(avctx, format);
330 if (ret < 0)
331 goto done;
332 break;
333#endif
334#if CONFIG_MPEG4_MEDIACODEC_DECODER
335 case AV_CODEC_ID_MPEG4:
336 codec_mime = "video/mp4v-es",
337
338 ret = mpeg4_set_extradata(avctx, format);
339 if (ret < 0)
340 goto done;
341 break;
342#endif
343#if CONFIG_VP8_MEDIACODEC_DECODER
344 case AV_CODEC_ID_VP8:
345 codec_mime = "video/x-vnd.on2.vp8";
346
347 ret = vpx_set_extradata(avctx, format);
348 if (ret < 0)
349 goto done;
350 break;
351#endif
352#if CONFIG_VP9_MEDIACODEC_DECODER
353 case AV_CODEC_ID_VP9:
354 codec_mime = "video/x-vnd.on2.vp9";
355
356 ret = vpx_set_extradata(avctx, format);
357 if (ret < 0)
358 goto done;
359 break;
360#endif
361 default:
362 av_assert0(0);
363 }
364
365 ff_AMediaFormat_setString(format, "mime", codec_mime);
366 ff_AMediaFormat_setInt32(format, "width", avctx->width);
367 ff_AMediaFormat_setInt32(format, "height", avctx->height);
368
369 s->ctx = av_mallocz(sizeof(*s->ctx));
370 if (!s->ctx) {
371 av_log(avctx, AV_LOG_ERROR, "Failed to allocate MediaCodecDecContext\n");
372 ret = AVERROR(ENOMEM);
373 goto done;
374 }
375
376 if ((ret = ff_mediacodec_dec_init(avctx, s->ctx, codec_mime, format)) < 0) {
377 s->ctx = NULL;
378 goto done;
379 }
380
381 av_log(avctx, AV_LOG_INFO, "MediaCodec started successfully, ret = %d\n", ret);
382
383 s->fifo = av_fifo_alloc(sizeof(AVPacket));
384 if (!s->fifo) {
385 ret = AVERROR(ENOMEM);
386 goto done;
387 }
388
389 if (bsf_name) {
390 bsf = av_bsf_get_by_name(bsf_name);
391 if(!bsf) {
392 ret = AVERROR_BSF_NOT_FOUND;
393 goto done;
394 }
395
396 if ((ret = av_bsf_alloc(bsf, &s->bsf))) {
397 goto done;
398 }
399
400 if (((ret = avcodec_parameters_from_context(s->bsf->par_in, avctx)) < 0) ||
401 ((ret = av_bsf_init(s->bsf)) < 0)) {
402 goto done;
403 }
404 }
405
406 av_init_packet(&s->filtered_pkt);
407
408done:
409 if (format) {
410 ff_AMediaFormat_delete(format);
411 }
412
413 if (ret < 0) {
414 mediacodec_decode_close(avctx);
415 }
416
417 return ret;
418}
419
420
421static int mediacodec_process_data(AVCodecContext *avctx, AVFrame *frame,
422 int *got_frame, AVPacket *pkt)
423{
424 MediaCodecH264DecContext *s = avctx->priv_data;
425
426 return ff_mediacodec_dec_decode(avctx, s->ctx, frame, got_frame, pkt);
427}
428
429static int mediacodec_decode_frame(AVCodecContext *avctx, void *data,
430 int *got_frame, AVPacket *avpkt)
431{
432 MediaCodecH264DecContext *s = avctx->priv_data;
433 AVFrame *frame = data;
434 int ret;
435
436 /* buffer the input packet */
437 if (avpkt->size) {
438 AVPacket input_pkt = { 0 };
439
440 if (av_fifo_space(s->fifo) < sizeof(input_pkt)) {
441 ret = av_fifo_realloc2(s->fifo,
442 av_fifo_size(s->fifo) + sizeof(input_pkt));
443 if (ret < 0)
444 return ret;
445 }
446
447 ret = av_packet_ref(&input_pkt, avpkt);
448 if (ret < 0)
449 return ret;
450 av_fifo_generic_write(s->fifo, &input_pkt, sizeof(input_pkt), NULL);
451 }
452
453 /*
454 * MediaCodec.flush() discards both input and output buffers, thus we
455 * need to delay the call to this function until the user has released or
456 * renderered the frames he retains.
457 *
458 * After we have buffered an input packet, check if the codec is in the
459 * flushing state. If it is, we need to call ff_mediacodec_dec_flush.
460 *
461 * ff_mediacodec_dec_flush returns 0 if the flush cannot be performed on
462 * the codec (because the user retains frames). The codec stays in the
463 * flushing state.
464 *
465 * ff_mediacodec_dec_flush returns 1 if the flush can actually be
466 * performed on the codec. The codec leaves the flushing state and can
467 * process again packets.
468 *
469 * ff_mediacodec_dec_flush returns a negative value if an error has
470 * occurred.
471 *
472 */
473 if (ff_mediacodec_dec_is_flushing(avctx, s->ctx)) {
474 if (!ff_mediacodec_dec_flush(avctx, s->ctx)) {
475 return avpkt->size;
476 }
477 }
478
479 /* process buffered data */
480 while (!*got_frame) {
481 /* prepare the input data -- convert to Annex B if needed */
482 if (s->filtered_pkt.size <= 0) {
483 AVPacket input_pkt = { 0 };
484
485 av_packet_unref(&s->filtered_pkt);
486
487 /* no more data */
488 if (av_fifo_size(s->fifo) < sizeof(AVPacket)) {
489 return avpkt->size ? avpkt->size :
490 ff_mediacodec_dec_decode(avctx, s->ctx, frame, got_frame, avpkt);
491 }
492
493 av_fifo_generic_read(s->fifo, &input_pkt, sizeof(input_pkt), NULL);
494
495 if (s->bsf) {
496 ret = av_bsf_send_packet(s->bsf, &input_pkt);
497 if (ret < 0) {
498 return ret;
499 }
500
501 ret = av_bsf_receive_packet(s->bsf, &s->filtered_pkt);
502 if (ret == AVERROR(EAGAIN)) {
503 goto done;
504 }
505 } else {
506 av_packet_move_ref(&s->filtered_pkt, &input_pkt);
507 }
508
509 /* {h264,hevc}_mp4toannexb are used here and do not require flushing */
510 av_assert0(ret != AVERROR_EOF);
511
512 if (ret < 0) {
513 return ret;
514 }
515 }
516
517 ret = mediacodec_process_data(avctx, frame, got_frame, &s->filtered_pkt);
518 if (ret < 0)
519 return ret;
520
521 s->filtered_pkt.size -= ret;
522 s->filtered_pkt.data += ret;
523 }
524done:
525 return avpkt->size;
526}
527
528static void mediacodec_decode_flush(AVCodecContext *avctx)
529{
530 MediaCodecH264DecContext *s = avctx->priv_data;
531
532 while (av_fifo_size(s->fifo)) {
533 AVPacket pkt;
534 av_fifo_generic_read(s->fifo, &pkt, sizeof(pkt), NULL);
535 av_packet_unref(&pkt);
536 }
537 av_fifo_reset(s->fifo);
538
539 av_packet_unref(&s->filtered_pkt);
540
541 ff_mediacodec_dec_flush(avctx, s->ctx);
542}
543
544#if CONFIG_H264_MEDIACODEC_DECODER
545AVCodec ff_h264_mediacodec_decoder = {
546 .name = "h264_mediacodec",
547 .long_name = NULL_IF_CONFIG_SMALL("H.264 Android MediaCodec decoder"),
548 .type = AVMEDIA_TYPE_VIDEO,
549 .id = AV_CODEC_ID_H264,
550 .priv_data_size = sizeof(MediaCodecH264DecContext),
551 .init = mediacodec_decode_init,
552 .decode = mediacodec_decode_frame,
553 .flush = mediacodec_decode_flush,
554 .close = mediacodec_decode_close,
555 .capabilities = CODEC_CAP_DELAY,
556 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
557};
558#endif
559
560#if CONFIG_HEVC_MEDIACODEC_DECODER
561AVCodec ff_hevc_mediacodec_decoder = {
562 .name = "hevc_mediacodec",
563 .long_name = NULL_IF_CONFIG_SMALL("H.265 Android MediaCodec decoder"),
564 .type = AVMEDIA_TYPE_VIDEO,
565 .id = AV_CODEC_ID_HEVC,
566 .priv_data_size = sizeof(MediaCodecH264DecContext),
567 .init = mediacodec_decode_init,
568 .decode = mediacodec_decode_frame,
569 .flush = mediacodec_decode_flush,
570 .close = mediacodec_decode_close,
571 .capabilities = CODEC_CAP_DELAY,
572 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
573};
574#endif
575
576#if CONFIG_MPEG4_MEDIACODEC_DECODER
577AVCodec ff_mpeg4_mediacodec_decoder = {
578 .name = "mpeg4_mediacodec",
579 .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 Android MediaCodec decoder"),
580 .type = AVMEDIA_TYPE_VIDEO,
581 .id = AV_CODEC_ID_MPEG4,
582 .priv_data_size = sizeof(MediaCodecH264DecContext),
583 .init = mediacodec_decode_init,
584 .decode = mediacodec_decode_frame,
585 .flush = mediacodec_decode_flush,
586 .close = mediacodec_decode_close,
587 .capabilities = CODEC_CAP_DELAY,
588 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
589};
590#endif
591
592#if CONFIG_VP8_MEDIACODEC_DECODER
593AVCodec ff_vp8_mediacodec_decoder = {
594 .name = "vp8_mediacodec",
595 .long_name = NULL_IF_CONFIG_SMALL("VP8 Android MediaCodec decoder"),
596 .type = AVMEDIA_TYPE_VIDEO,
597 .id = AV_CODEC_ID_VP8,
598 .priv_data_size = sizeof(MediaCodecH264DecContext),
599 .init = mediacodec_decode_init,
600 .decode = mediacodec_decode_frame,
601 .flush = mediacodec_decode_flush,
602 .close = mediacodec_decode_close,
603 .capabilities = CODEC_CAP_DELAY,
604 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
605};
606#endif
607
608#if CONFIG_VP9_MEDIACODEC_DECODER
609AVCodec ff_vp9_mediacodec_decoder = {
610 .name = "vp9_mediacodec",
611 .long_name = NULL_IF_CONFIG_SMALL("VP9 Android MediaCodec decoder"),
612 .type = AVMEDIA_TYPE_VIDEO,
613 .id = AV_CODEC_ID_VP9,
614 .priv_data_size = sizeof(MediaCodecH264DecContext),
615 .init = mediacodec_decode_init,
616 .decode = mediacodec_decode_frame,
617 .flush = mediacodec_decode_flush,
618 .close = mediacodec_decode_close,
619 .capabilities = CODEC_CAP_DELAY,
620 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
621};
622#endif
623
generated by cgit at 2024-05-18 04:42:24 (GMT)