3 * Copyright (c) 2015 Rodger Combs
5 * This file is part of FFmpeg.
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.
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.
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
28 #include <interface/mmal/mmal.h>
29 #include <interface/mmal/mmal_parameters_video.h>
30 #include <interface/mmal/util/mmal_util.h>
31 #include <interface/mmal/util/mmal_util_params.h>
32 #include <interface/mmal/util/mmal_default_components.h>
33 #include <interface/mmal/vc/mmal_vc_api.h>
37 #include "libavutil/atomic.h"
38 #include "libavutil/avassert.h"
39 #include "libavutil/buffer.h"
40 #include "libavutil/common.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/log.h"
44 typedef struct FFBufferEntry {
50 struct FFBufferEntry *next;
53 // MMAL_POOL_T destroys all of its MMAL_BUFFER_HEADER_Ts. If we want correct
54 // refcounting for AVFrames, we can free the MMAL_POOL_T only after all AVFrames
55 // have been unreferenced.
56 typedef struct FFPoolRef {
57 volatile int refcount;
61 typedef struct FFBufferRef {
62 MMAL_BUFFER_HEADER_T *buffer;
66 typedef struct MMALDecodeContext {
70 MMAL_COMPONENT_T *decoder;
71 MMAL_QUEUE_T *queue_decoded_frames;
75 // Waiting input packets. Because the libavcodec API requires decoding and
76 // returning packets in lockstep, it can happen that queue_decoded_frames
77 // contains almost all surfaces - then the decoder input queue can quickly
78 // fill up and won't accept new input either. Without consuming input, the
79 // libavcodec API can't return new frames, and we have a logical deadlock.
80 // This is avoided by queuing such buffers here.
81 FFBufferEntry *waiting_buffers, *waiting_buffers_tail;
84 int64_t frames_output;
90 // Assume decoder is guaranteed to produce output after at least this many
91 // packets (where each packet contains 1 frame).
92 #define MAX_DELAYED_FRAMES 16
94 static void ffmmal_poolref_unref(FFPoolRef *ref)
96 if (ref && avpriv_atomic_int_add_and_fetch(&ref->refcount, -1) == 0) {
97 mmal_pool_destroy(ref->pool);
102 static void ffmmal_release_frame(void *opaque, uint8_t *data)
104 FFBufferRef *ref = (void *)data;
106 mmal_buffer_header_release(ref->buffer);
107 ffmmal_poolref_unref(ref->pool);
112 // Setup frame with a new reference to buffer. The buffer must have been
113 // allocated from the given pool.
114 static int ffmmal_set_ref(AVFrame *frame, FFPoolRef *pool,
115 MMAL_BUFFER_HEADER_T *buffer)
117 FFBufferRef *ref = av_mallocz(sizeof(*ref));
119 return AVERROR(ENOMEM);
122 ref->buffer = buffer;
124 frame->buf[0] = av_buffer_create((void *)ref, sizeof(*ref),
125 ffmmal_release_frame, NULL,
126 AV_BUFFER_FLAG_READONLY);
127 if (!frame->buf[0]) {
129 return AVERROR(ENOMEM);
132 avpriv_atomic_int_add_and_fetch(&ref->pool->refcount, 1);
133 mmal_buffer_header_acquire(buffer);
135 frame->format = AV_PIX_FMT_MMAL;
136 frame->data[3] = (uint8_t *)ref->buffer;
140 static void ffmmal_stop_decoder(AVCodecContext *avctx)
142 MMALDecodeContext *ctx = avctx->priv_data;
143 MMAL_COMPONENT_T *decoder = ctx->decoder;
144 MMAL_BUFFER_HEADER_T *buffer;
146 mmal_port_disable(decoder->input[0]);
147 mmal_port_disable(decoder->output[0]);
148 mmal_port_disable(decoder->control);
150 mmal_port_flush(decoder->input[0]);
151 mmal_port_flush(decoder->output[0]);
152 mmal_port_flush(decoder->control);
154 while ((buffer = mmal_queue_get(ctx->queue_decoded_frames)))
155 mmal_buffer_header_release(buffer);
157 while (ctx->waiting_buffers) {
158 FFBufferEntry *buffer = ctx->waiting_buffers;
160 ctx->waiting_buffers = buffer->next;
162 av_buffer_unref(&buffer->ref);
165 ctx->waiting_buffers_tail = NULL;
167 ctx->frames_output = ctx->eos_received = ctx->eos_sent = ctx->packets_sent = ctx->extradata_sent = 0;
170 static av_cold int ffmmal_close_decoder(AVCodecContext *avctx)
172 MMALDecodeContext *ctx = avctx->priv_data;
175 ffmmal_stop_decoder(avctx);
177 mmal_component_destroy(ctx->decoder);
179 mmal_queue_destroy(ctx->queue_decoded_frames);
180 mmal_pool_destroy(ctx->pool_in);
181 ffmmal_poolref_unref(ctx->pool_out);
188 static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
191 AVBufferRef *buf = buffer->user_data;
192 av_buffer_unref(&buf);
194 mmal_buffer_header_release(buffer);
197 static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
199 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
200 MMALDecodeContext *ctx = avctx->priv_data;
202 mmal_queue_put(ctx->queue_decoded_frames, buffer);
205 static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
207 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
208 MMAL_STATUS_T status;
210 if (buffer->cmd == MMAL_EVENT_ERROR) {
211 status = *(uint32_t *)buffer->data;
212 av_log(avctx, AV_LOG_ERROR, "MMAL error %d on control port\n", (int)status);
215 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
216 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on control port\n", s);
219 mmal_buffer_header_release(buffer);
222 // Feed free output buffers to the decoder.
223 static int ffmmal_fill_output_port(AVCodecContext *avctx)
225 MMALDecodeContext *ctx = avctx->priv_data;
226 MMAL_BUFFER_HEADER_T *buffer;
227 MMAL_STATUS_T status;
230 return AVERROR_UNKNOWN; // format change code failed with OOM previously
232 while ((buffer = mmal_queue_get(ctx->pool_out->pool->queue))) {
233 if ((status = mmal_port_send_buffer(ctx->decoder->output[0], buffer))) {
234 mmal_buffer_header_release(buffer);
235 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending output buffer.\n", (int)status);
236 return AVERROR_UNKNOWN;
243 static enum AVColorSpace ffmmal_csp_to_av_csp(MMAL_FOURCC_T fourcc)
246 case MMAL_COLOR_SPACE_BT470_2_BG:
247 case MMAL_COLOR_SPACE_BT470_2_M:
248 case MMAL_COLOR_SPACE_ITUR_BT601: return AVCOL_SPC_BT470BG;
249 case MMAL_COLOR_SPACE_ITUR_BT709: return AVCOL_SPC_BT709;
250 case MMAL_COLOR_SPACE_FCC: return AVCOL_SPC_FCC;
251 case MMAL_COLOR_SPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M;
252 default: return AVCOL_SPC_UNSPECIFIED;
256 static int ffmal_update_format(AVCodecContext *avctx)
258 MMALDecodeContext *ctx = avctx->priv_data;
259 MMAL_STATUS_T status;
261 MMAL_COMPONENT_T *decoder = ctx->decoder;
262 MMAL_ES_FORMAT_T *format_out = decoder->output[0]->format;
264 ffmmal_poolref_unref(ctx->pool_out);
265 if (!(ctx->pool_out = av_mallocz(sizeof(*ctx->pool_out)))) {
266 ret = AVERROR(ENOMEM);
269 ctx->pool_out->refcount = 1;
274 if ((status = mmal_port_parameter_set_uint32(decoder->output[0], MMAL_PARAMETER_EXTRA_BUFFERS, ctx->extra_buffers)))
277 if ((status = mmal_port_parameter_set_boolean(decoder->output[0], MMAL_PARAMETER_VIDEO_INTERPOLATE_TIMESTAMPS, 0)))
280 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
281 format_out->encoding = MMAL_ENCODING_OPAQUE;
283 format_out->encoding_variant = format_out->encoding = MMAL_ENCODING_I420;
286 if ((status = mmal_port_format_commit(decoder->output[0])))
289 if ((ret = ff_set_dimensions(avctx, format_out->es->video.crop.x + format_out->es->video.crop.width,
290 format_out->es->video.crop.y + format_out->es->video.crop.height)) < 0)
293 if (format_out->es->video.par.num && format_out->es->video.par.den) {
294 avctx->sample_aspect_ratio.num = format_out->es->video.par.num;
295 avctx->sample_aspect_ratio.den = format_out->es->video.par.den;
298 avctx->colorspace = ffmmal_csp_to_av_csp(format_out->es->video.color_space);
300 decoder->output[0]->buffer_size =
301 FFMAX(decoder->output[0]->buffer_size_min, decoder->output[0]->buffer_size_recommended);
302 decoder->output[0]->buffer_num =
303 FFMAX(decoder->output[0]->buffer_num_min, decoder->output[0]->buffer_num_recommended) + ctx->extra_buffers;
304 ctx->pool_out->pool = mmal_pool_create(decoder->output[0]->buffer_num,
305 decoder->output[0]->buffer_size);
306 if (!ctx->pool_out->pool) {
307 ret = AVERROR(ENOMEM);
314 return ret < 0 ? ret : AVERROR_UNKNOWN;
317 static av_cold int ffmmal_init_decoder(AVCodecContext *avctx)
319 MMALDecodeContext *ctx = avctx->priv_data;
320 MMAL_STATUS_T status;
321 MMAL_ES_FORMAT_T *format_in;
322 MMAL_COMPONENT_T *decoder;
327 if (mmal_vc_init()) {
328 av_log(avctx, AV_LOG_ERROR, "Cannot initialize MMAL VC driver!\n");
329 return AVERROR(ENOSYS);
332 if ((ret = ff_get_format(avctx, avctx->codec->pix_fmts)) < 0)
335 avctx->pix_fmt = ret;
337 if ((status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_DECODER, &ctx->decoder)))
340 decoder = ctx->decoder;
342 format_in = decoder->input[0]->format;
343 format_in->type = MMAL_ES_TYPE_VIDEO;
344 format_in->encoding = MMAL_ENCODING_H264;
345 format_in->es->video.width = FFALIGN(avctx->width, 32);
346 format_in->es->video.height = FFALIGN(avctx->height, 16);
347 format_in->es->video.crop.width = avctx->width;
348 format_in->es->video.crop.height = avctx->height;
349 format_in->es->video.frame_rate.num = 24000;
350 format_in->es->video.frame_rate.den = 1001;
351 format_in->es->video.par.num = avctx->sample_aspect_ratio.num;
352 format_in->es->video.par.den = avctx->sample_aspect_ratio.den;
353 format_in->flags = MMAL_ES_FORMAT_FLAG_FRAMED;
355 if ((status = mmal_port_format_commit(decoder->input[0])))
358 decoder->input[0]->buffer_num =
359 FFMAX(decoder->input[0]->buffer_num_min, 20);
360 decoder->input[0]->buffer_size =
361 FFMAX(decoder->input[0]->buffer_size_min, 512 * 1024);
362 ctx->pool_in = mmal_pool_create(decoder->input[0]->buffer_num, 0);
364 ret = AVERROR(ENOMEM);
368 if ((ret = ffmal_update_format(avctx)) < 0)
371 ctx->queue_decoded_frames = mmal_queue_create();
372 if (!ctx->queue_decoded_frames)
375 decoder->input[0]->userdata = (void*)avctx;
376 decoder->output[0]->userdata = (void*)avctx;
377 decoder->control->userdata = (void*)avctx;
379 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
381 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
383 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
386 if ((status = mmal_component_enable(decoder)))
392 ffmmal_close_decoder(avctx);
393 return ret < 0 ? ret : AVERROR_UNKNOWN;
396 static void ffmmal_flush(AVCodecContext *avctx)
398 MMALDecodeContext *ctx = avctx->priv_data;
399 MMAL_COMPONENT_T *decoder = ctx->decoder;
400 MMAL_STATUS_T status;
402 ffmmal_stop_decoder(avctx);
404 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
406 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
408 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
414 av_log(avctx, AV_LOG_ERROR, "MMAL flush error: %i\n", (int)status);
417 // Split packets and add them to the waiting_buffers list. We don't queue them
418 // immediately, because it can happen that the decoder is temporarily blocked
419 // (due to us not reading/returning enough output buffers) and won't accept
420 // new input. (This wouldn't be an issue if MMAL input buffers always were
421 // complete frames - then the input buffer just would have to be big enough.)
422 // If is_extradata is set, send it as MMAL_BUFFER_HEADER_FLAG_CONFIG.
423 static int ffmmal_add_packet(AVCodecContext *avctx, AVPacket *avpkt,
426 MMALDecodeContext *ctx = avctx->priv_data;
427 AVBufferRef *buf = NULL;
429 uint8_t *data = (uint8_t *)"";
435 buf = av_buffer_ref(avpkt->buf);
439 buf = av_buffer_alloc(avpkt->size);
441 memcpy(buf->data, avpkt->data, avpkt->size);
447 ret = AVERROR(ENOMEM);
453 if (!ctx->packets_sent) {
454 // Short-cut the flush logic to avoid upsetting MMAL.
456 ctx->eos_received = 1;
464 FFBufferEntry *buffer = av_mallocz(sizeof(*buffer));
466 ret = AVERROR(ENOMEM);
471 buffer->length = FFMIN(size, ctx->decoder->input[0]->buffer_size);
474 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_CONFIG;
477 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_START;
479 data += buffer->length;
480 size -= buffer->length;
482 buffer->pts = avpkt->pts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->pts;
483 buffer->dts = avpkt->dts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->dts;
486 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_END;
488 if (!buffer->length) {
489 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
494 buffer->ref = av_buffer_ref(buf);
497 ret = AVERROR(ENOMEM);
502 // Insert at end of the list
503 if (!ctx->waiting_buffers)
504 ctx->waiting_buffers = buffer;
505 if (ctx->waiting_buffers_tail)
506 ctx->waiting_buffers_tail->next = buffer;
507 ctx->waiting_buffers_tail = buffer;
511 av_buffer_unref(&buf);
515 // Move prepared/split packets from waiting_buffers to the MMAL decoder.
516 static int ffmmal_fill_input_port(AVCodecContext *avctx)
518 MMALDecodeContext *ctx = avctx->priv_data;
520 while (ctx->waiting_buffers) {
521 MMAL_BUFFER_HEADER_T *mbuffer;
522 FFBufferEntry *buffer;
523 MMAL_STATUS_T status;
525 mbuffer = mmal_queue_get(ctx->pool_in->queue);
529 buffer = ctx->waiting_buffers;
531 mmal_buffer_header_reset(mbuffer);
533 mbuffer->pts = buffer->pts;
534 mbuffer->dts = buffer->dts;
535 mbuffer->flags = buffer->flags;
536 mbuffer->data = buffer->data;
537 mbuffer->length = buffer->length;
538 mbuffer->user_data = buffer->ref;
539 mbuffer->alloc_size = ctx->decoder->input[0]->buffer_size;
541 if ((status = mmal_port_send_buffer(ctx->decoder->input[0], mbuffer))) {
542 mmal_buffer_header_release(mbuffer);
543 av_buffer_unref(&buffer->ref);
546 // Remove from start of the list
547 ctx->waiting_buffers = buffer->next;
548 if (ctx->waiting_buffers_tail == buffer)
549 ctx->waiting_buffers_tail = NULL;
553 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending input\n", (int)status);
554 return AVERROR_UNKNOWN;
561 static int ffmal_copy_frame(AVCodecContext *avctx, AVFrame *frame,
562 MMAL_BUFFER_HEADER_T *buffer)
564 MMALDecodeContext *ctx = avctx->priv_data;
567 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
569 return AVERROR_UNKNOWN; // format change code failed with OOM previously
571 if ((ret = ff_decode_frame_props(avctx, frame)) < 0)
574 if ((ret = ffmmal_set_ref(frame, ctx->pool_out, buffer)) < 0)
577 int w = FFALIGN(avctx->width, 32);
578 int h = FFALIGN(avctx->height, 16);
583 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
586 ptr = buffer->data + buffer->type->video.offset[0];
587 for (i = 0; i < avctx->height; i++)
588 memcpy(frame->data[0] + frame->linesize[0] * i, ptr + w * i, avctx->width);
592 for (plane = 1; plane < 3; plane++) {
593 for (i = 0; i < avctx->height / 2; i++)
594 memcpy(frame->data[plane] + frame->linesize[plane] * i, ptr + w / 2 * i, (avctx->width + 1) / 2);
595 ptr += w / 2 * h / 2;
599 frame->pkt_pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
600 frame->pkt_dts = AV_NOPTS_VALUE;
606 // Fetch a decoded buffer and place it into the frame parameter.
607 static int ffmmal_read_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
609 MMALDecodeContext *ctx = avctx->priv_data;
610 MMAL_BUFFER_HEADER_T *buffer = NULL;
611 MMAL_STATUS_T status = 0;
614 if (ctx->eos_received)
618 // To ensure decoding in lockstep with a constant delay between fed packets
619 // and output frames, we always wait until an output buffer is available.
620 // Except during start we don't know after how many input packets the decoder
621 // is going to return the first buffer, and we can't distinguish decoder
622 // being busy from decoder waiting for input. So just poll at the start and
623 // keep feeding new data to the buffer.
624 // We are pretty sure the decoder will produce output if we sent more input
625 // frames than what a h264 decoder could logically delay. This avoids too
626 // excessive buffering.
627 // We also wait if we sent eos, but didn't receive it yet (think of decoding
628 // stream with a very low number of frames).
629 if (ctx->frames_output || ctx->packets_sent > MAX_DELAYED_FRAMES ||
630 (ctx->packets_sent && ctx->eos_sent)) {
631 // MMAL will ignore broken input packets, which means the frame we
632 // expect here may never arrive. Dealing with this correctly is
633 // complicated, so here's a hack to avoid that it freezes forever
634 // in this unlikely situation.
635 buffer = mmal_queue_timedwait(ctx->queue_decoded_frames, 100);
637 av_log(avctx, AV_LOG_ERROR, "Did not get output frame from MMAL.\n");
638 ret = AVERROR_UNKNOWN;
642 buffer = mmal_queue_get(ctx->queue_decoded_frames);
647 ctx->eos_received |= !!(buffer->flags & MMAL_BUFFER_HEADER_FLAG_EOS);
648 if (ctx->eos_received)
651 if (buffer->cmd == MMAL_EVENT_FORMAT_CHANGED) {
652 MMAL_COMPONENT_T *decoder = ctx->decoder;
653 MMAL_EVENT_FORMAT_CHANGED_T *ev = mmal_event_format_changed_get(buffer);
654 MMAL_BUFFER_HEADER_T *stale_buffer;
656 av_log(avctx, AV_LOG_INFO, "Changing output format.\n");
658 if ((status = mmal_port_disable(decoder->output[0])))
661 while ((stale_buffer = mmal_queue_get(ctx->queue_decoded_frames)))
662 mmal_buffer_header_release(stale_buffer);
664 mmal_format_copy(decoder->output[0]->format, ev->format);
666 if ((ret = ffmal_update_format(avctx)) < 0)
669 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
672 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
675 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
678 mmal_buffer_header_release(buffer);
680 } else if (buffer->cmd) {
682 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
683 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on output port\n", s);
685 } else if (buffer->length == 0) {
686 // Unused output buffer that got drained after format change.
687 mmal_buffer_header_release(buffer);
691 ctx->frames_output++;
693 if ((ret = ffmal_copy_frame(avctx, frame, buffer)) < 0)
702 mmal_buffer_header_release(buffer);
703 if (status && ret >= 0)
704 ret = AVERROR_UNKNOWN;
708 static int ffmmal_decode(AVCodecContext *avctx, void *data, int *got_frame,
711 MMALDecodeContext *ctx = avctx->priv_data;
712 AVFrame *frame = data;
715 if (avctx->extradata_size && !ctx->extradata_sent) {
717 av_init_packet(&pkt);
718 pkt.data = avctx->extradata;
719 pkt.size = avctx->extradata_size;
720 ctx->extradata_sent = 1;
721 if ((ret = ffmmal_add_packet(avctx, &pkt, 1)) < 0)
725 if ((ret = ffmmal_add_packet(avctx, avpkt, 0)) < 0)
728 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
731 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
734 if ((ret = ffmmal_read_frame(avctx, frame, got_frame)) < 0)
737 // ffmmal_read_frame() can block for a while. Since the decoder is
738 // asynchronous, it's a good idea to fill the ports again.
740 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
743 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
749 AVHWAccel ff_h264_mmal_hwaccel = {
751 .type = AVMEDIA_TYPE_VIDEO,
752 .id = AV_CODEC_ID_H264,
753 .pix_fmt = AV_PIX_FMT_MMAL,
756 static const AVOption options[]={
757 {"extra_buffers", "extra buffers", offsetof(MMALDecodeContext, extra_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
761 static const AVClass ffmmaldec_class = {
762 .class_name = "mmaldec",
764 .version = LIBAVUTIL_VERSION_INT,
767 AVCodec ff_h264_mmal_decoder = {
769 .long_name = NULL_IF_CONFIG_SMALL("h264 (mmal)"),
770 .type = AVMEDIA_TYPE_VIDEO,
771 .id = AV_CODEC_ID_H264,
772 .priv_data_size = sizeof(MMALDecodeContext),
773 .init = ffmmal_init_decoder,
774 .close = ffmmal_close_decoder,
775 .decode = ffmmal_decode,
776 .flush = ffmmal_flush,
777 .priv_class = &ffmmaldec_class,
778 .capabilities = AV_CODEC_CAP_DELAY,
779 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
780 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MMAL,