3 * Copyright (c) 2015 Rodger Combs
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 AVBitStreamFilterContext *bsfc;
72 MMAL_COMPONENT_T *decoder;
73 MMAL_QUEUE_T *queue_decoded_frames;
77 // Waiting input packets. Because the libavcodec API requires decoding and
78 // returning packets in lockstep, it can happen that queue_decoded_frames
79 // contains almost all surfaces - then the decoder input queue can quickly
80 // fill up and won't accept new input either. Without consuming input, the
81 // libavcodec API can't return new frames, and we have a logical deadlock.
82 // This is avoided by queuing such buffers here.
83 FFBufferEntry *waiting_buffers, *waiting_buffers_tail;
86 int64_t frames_output;
91 // Assume decoder is guaranteed to produce output after at least this many
92 // packets (where each packet contains 1 frame).
93 #define MAX_DELAYED_FRAMES 16
95 static void ffmmal_poolref_unref(FFPoolRef *ref)
97 if (ref && avpriv_atomic_int_add_and_fetch(&ref->refcount, -1) == 0) {
98 mmal_pool_destroy(ref->pool);
103 static void ffmmal_release_frame(void *opaque, uint8_t *data)
105 FFBufferRef *ref = (void *)data;
107 mmal_buffer_header_release(ref->buffer);
108 ffmmal_poolref_unref(ref->pool);
113 // Setup frame with a new reference to buffer. The buffer must have been
114 // allocated from the given pool.
115 static int ffmmal_set_ref(AVFrame *frame, FFPoolRef *pool,
116 MMAL_BUFFER_HEADER_T *buffer)
118 FFBufferRef *ref = av_mallocz(sizeof(*ref));
120 return AVERROR(ENOMEM);
123 ref->buffer = buffer;
125 frame->buf[0] = av_buffer_create((void *)ref, sizeof(*ref),
126 ffmmal_release_frame, NULL,
127 AV_BUFFER_FLAG_READONLY);
128 if (!frame->buf[0]) {
130 return AVERROR(ENOMEM);
133 avpriv_atomic_int_add_and_fetch(&ref->pool->refcount, 1);
134 mmal_buffer_header_acquire(buffer);
136 frame->format = AV_PIX_FMT_MMAL;
137 frame->data[3] = (uint8_t *)ref->buffer;
141 static void ffmmal_stop_decoder(AVCodecContext *avctx)
143 MMALDecodeContext *ctx = avctx->priv_data;
144 MMAL_COMPONENT_T *decoder = ctx->decoder;
145 MMAL_BUFFER_HEADER_T *buffer;
147 mmal_port_disable(decoder->input[0]);
148 mmal_port_disable(decoder->output[0]);
149 mmal_port_disable(decoder->control);
151 mmal_port_flush(decoder->input[0]);
152 mmal_port_flush(decoder->output[0]);
153 mmal_port_flush(decoder->control);
155 while ((buffer = mmal_queue_get(ctx->queue_decoded_frames)))
156 mmal_buffer_header_release(buffer);
158 while (ctx->waiting_buffers) {
159 FFBufferEntry *buffer = ctx->waiting_buffers;
161 ctx->waiting_buffers = buffer->next;
163 av_buffer_unref(&buffer->ref);
166 ctx->waiting_buffers_tail = NULL;
168 ctx->frames_output = ctx->eos_received = ctx->eos_sent = ctx->packets_sent = 0;
171 static av_cold int ffmmal_close_decoder(AVCodecContext *avctx)
173 MMALDecodeContext *ctx = avctx->priv_data;
176 ffmmal_stop_decoder(avctx);
178 mmal_component_destroy(ctx->decoder);
180 mmal_queue_destroy(ctx->queue_decoded_frames);
181 mmal_pool_destroy(ctx->pool_in);
182 ffmmal_poolref_unref(ctx->pool_out);
185 av_bitstream_filter_close(ctx->bsfc);
192 static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
195 AVBufferRef *buf = buffer->user_data;
196 av_buffer_unref(&buf);
198 mmal_buffer_header_release(buffer);
201 static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
203 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
204 MMALDecodeContext *ctx = avctx->priv_data;
206 mmal_queue_put(ctx->queue_decoded_frames, buffer);
209 static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
211 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
212 MMAL_STATUS_T status;
214 if (buffer->cmd == MMAL_EVENT_ERROR) {
215 status = *(uint32_t *)buffer->data;
216 av_log(avctx, AV_LOG_ERROR, "MMAL error %d on control port\n", (int)status);
219 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
220 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on control port\n", s);
223 mmal_buffer_header_release(buffer);
226 // Feed free output buffers to the decoder.
227 static int ffmmal_fill_output_port(AVCodecContext *avctx)
229 MMALDecodeContext *ctx = avctx->priv_data;
230 MMAL_BUFFER_HEADER_T *buffer;
231 MMAL_STATUS_T status;
234 return AVERROR_UNKNOWN; // format change code failed with OOM previously
236 while ((buffer = mmal_queue_get(ctx->pool_out->pool->queue))) {
237 if ((status = mmal_port_send_buffer(ctx->decoder->output[0], buffer))) {
238 mmal_buffer_header_release(buffer);
239 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending output buffer.\n", (int)status);
240 return AVERROR_UNKNOWN;
247 static enum AVColorSpace ffmmal_csp_to_av_csp(MMAL_FOURCC_T fourcc)
250 case MMAL_COLOR_SPACE_BT470_2_BG:
251 case MMAL_COLOR_SPACE_BT470_2_M:
252 case MMAL_COLOR_SPACE_ITUR_BT601: return AVCOL_SPC_BT470BG;
253 case MMAL_COLOR_SPACE_ITUR_BT709: return AVCOL_SPC_BT709;
254 case MMAL_COLOR_SPACE_FCC: return AVCOL_SPC_FCC;
255 case MMAL_COLOR_SPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M;
256 default: return AVCOL_SPC_UNSPECIFIED;
260 static int ffmal_update_format(AVCodecContext *avctx)
262 MMALDecodeContext *ctx = avctx->priv_data;
263 MMAL_STATUS_T status;
265 MMAL_COMPONENT_T *decoder = ctx->decoder;
266 MMAL_ES_FORMAT_T *format_out = decoder->output[0]->format;
268 ffmmal_poolref_unref(ctx->pool_out);
269 if (!(ctx->pool_out = av_mallocz(sizeof(*ctx->pool_out)))) {
270 ret = AVERROR(ENOMEM);
273 ctx->pool_out->refcount = 1;
278 if ((status = mmal_port_parameter_set_uint32(decoder->output[0], MMAL_PARAMETER_EXTRA_BUFFERS, ctx->extra_buffers)))
281 if ((status = mmal_port_parameter_set_boolean(decoder->output[0], MMAL_PARAMETER_VIDEO_INTERPOLATE_TIMESTAMPS, 0)))
284 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
285 format_out->encoding = MMAL_ENCODING_OPAQUE;
287 format_out->encoding_variant = format_out->encoding = MMAL_ENCODING_I420;
290 if ((status = mmal_port_format_commit(decoder->output[0])))
293 if ((ret = ff_set_dimensions(avctx, format_out->es->video.crop.x + format_out->es->video.crop.width,
294 format_out->es->video.crop.y + format_out->es->video.crop.height)) < 0)
297 if (format_out->es->video.par.num && format_out->es->video.par.den) {
298 avctx->sample_aspect_ratio.num = format_out->es->video.par.num;
299 avctx->sample_aspect_ratio.den = format_out->es->video.par.den;
302 avctx->colorspace = ffmmal_csp_to_av_csp(format_out->es->video.color_space);
304 decoder->output[0]->buffer_size =
305 FFMAX(decoder->output[0]->buffer_size_min, decoder->output[0]->buffer_size_recommended);
306 decoder->output[0]->buffer_num =
307 FFMAX(decoder->output[0]->buffer_num_min, decoder->output[0]->buffer_num_recommended) + ctx->extra_buffers;
308 ctx->pool_out->pool = mmal_pool_create(decoder->output[0]->buffer_num,
309 decoder->output[0]->buffer_size);
310 if (!ctx->pool_out->pool) {
311 ret = AVERROR(ENOMEM);
318 return ret < 0 ? ret : AVERROR_UNKNOWN;
321 static av_cold int ffmmal_init_decoder(AVCodecContext *avctx)
323 MMALDecodeContext *ctx = avctx->priv_data;
324 MMAL_STATUS_T status;
325 MMAL_ES_FORMAT_T *format_in;
326 MMAL_COMPONENT_T *decoder;
331 if (mmal_vc_init()) {
332 av_log(avctx, AV_LOG_ERROR, "Cannot initialize MMAL VC driver!\n");
333 return AVERROR(ENOSYS);
336 if ((ret = ff_get_format(avctx, avctx->codec->pix_fmts)) < 0)
339 avctx->pix_fmt = ret;
341 if ((status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_DECODER, &ctx->decoder)))
344 decoder = ctx->decoder;
346 format_in = decoder->input[0]->format;
347 format_in->type = MMAL_ES_TYPE_VIDEO;
348 format_in->encoding = MMAL_ENCODING_H264;
349 format_in->es->video.width = FFALIGN(avctx->width, 32);
350 format_in->es->video.height = FFALIGN(avctx->height, 16);
351 format_in->es->video.crop.width = avctx->width;
352 format_in->es->video.crop.height = avctx->height;
353 format_in->es->video.frame_rate.num = 24000;
354 format_in->es->video.frame_rate.den = 1001;
355 format_in->es->video.par.num = avctx->sample_aspect_ratio.num;
356 format_in->es->video.par.den = avctx->sample_aspect_ratio.den;
357 format_in->flags = MMAL_ES_FORMAT_FLAG_FRAMED;
359 if (avctx->codec->id == AV_CODEC_ID_H264 && avctx->extradata && avctx->extradata[0] == 1) {
362 ctx->bsfc = av_bitstream_filter_init("h264_mp4toannexb");
364 av_log(avctx, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
365 ret = AVERROR(ENOSYS);
368 av_bitstream_filter_filter(ctx->bsfc, avctx, NULL, &dummy_p, &dummy_int, NULL, 0, 0);
371 if (avctx->extradata_size) {
372 if ((status = mmal_format_extradata_alloc(format_in, avctx->extradata_size)))
374 format_in->extradata_size = avctx->extradata_size;
375 memcpy(format_in->extradata, avctx->extradata, format_in->extradata_size);
378 if ((status = mmal_port_format_commit(decoder->input[0])))
381 decoder->input[0]->buffer_num =
382 FFMAX(decoder->input[0]->buffer_num_min, 20);
383 decoder->input[0]->buffer_size =
384 FFMAX(decoder->input[0]->buffer_size_min, 512 * 1024);
385 ctx->pool_in = mmal_pool_create(decoder->input[0]->buffer_num, 0);
387 ret = AVERROR(ENOMEM);
391 if ((ret = ffmal_update_format(avctx)) < 0)
394 ctx->queue_decoded_frames = mmal_queue_create();
395 if (!ctx->queue_decoded_frames)
398 decoder->input[0]->userdata = (void*)avctx;
399 decoder->output[0]->userdata = (void*)avctx;
400 decoder->control->userdata = (void*)avctx;
402 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
404 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
406 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
409 if ((status = mmal_component_enable(decoder)))
415 ffmmal_close_decoder(avctx);
416 return ret < 0 ? ret : AVERROR_UNKNOWN;
419 static void ffmmal_flush(AVCodecContext *avctx)
421 MMALDecodeContext *ctx = avctx->priv_data;
422 MMAL_COMPONENT_T *decoder = ctx->decoder;
423 MMAL_STATUS_T status;
425 ffmmal_stop_decoder(avctx);
427 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
429 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
431 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
437 av_log(avctx, AV_LOG_ERROR, "MMAL flush error: %i\n", (int)status);
440 // Split packets and add them to the waiting_buffers list. We don't queue them
441 // immediately, because it can happen that the decoder is temporarily blocked
442 // (due to us not reading/returning enough output buffers) and won't accept
443 // new input. (This wouldn't be an issue if MMAL input buffers always were
444 // complete frames - then the input buffer just would have to be big enough.)
445 static int ffmmal_add_packet(AVCodecContext *avctx, AVPacket *avpkt)
447 MMALDecodeContext *ctx = avctx->priv_data;
448 AVBufferRef *buf = NULL;
450 uint8_t *data = (uint8_t *)"";
458 if ((ret = av_bitstream_filter_filter(ctx->bsfc, avctx, NULL,
459 &tmp_data, &tmp_size,
460 avpkt->data, avpkt->size,
461 avpkt->flags & AV_PKT_FLAG_KEY)) < 0)
463 buf = av_buffer_create(tmp_data, tmp_size, NULL, NULL, 0);
466 buf = av_buffer_ref(avpkt->buf);
468 buf = av_buffer_alloc(avpkt->size);
470 memcpy(buf->data, avpkt->data, avpkt->size);
474 ret = AVERROR(ENOMEM);
481 if (!ctx->packets_sent) {
482 // Short-cut the flush logic to avoid upsetting MMAL.
484 ctx->eos_received = 1;
492 FFBufferEntry *buffer = av_mallocz(sizeof(*buffer));
494 ret = AVERROR(ENOMEM);
499 buffer->length = FFMIN(size, ctx->decoder->input[0]->buffer_size);
502 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_START;
504 data += buffer->length;
505 size -= buffer->length;
507 buffer->pts = avpkt->pts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->pts;
508 buffer->dts = avpkt->dts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->dts;
511 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_END;
513 if (!buffer->length) {
514 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
519 buffer->ref = av_buffer_ref(buf);
522 ret = AVERROR(ENOMEM);
527 // Insert at end of the list
528 if (!ctx->waiting_buffers)
529 ctx->waiting_buffers = buffer;
530 if (ctx->waiting_buffers_tail)
531 ctx->waiting_buffers_tail->next = buffer;
532 ctx->waiting_buffers_tail = buffer;
536 av_buffer_unref(&buf);
540 // Move prepared/split packets from waiting_buffers to the MMAL decoder.
541 static int ffmmal_fill_input_port(AVCodecContext *avctx)
543 MMALDecodeContext *ctx = avctx->priv_data;
545 while (ctx->waiting_buffers) {
546 MMAL_BUFFER_HEADER_T *mbuffer;
547 FFBufferEntry *buffer;
548 MMAL_STATUS_T status;
550 mbuffer = mmal_queue_get(ctx->pool_in->queue);
554 buffer = ctx->waiting_buffers;
556 mmal_buffer_header_reset(mbuffer);
558 mbuffer->pts = buffer->pts;
559 mbuffer->dts = buffer->dts;
560 mbuffer->flags = buffer->flags;
561 mbuffer->data = buffer->data;
562 mbuffer->length = buffer->length;
563 mbuffer->user_data = buffer->ref;
564 mbuffer->alloc_size = ctx->decoder->input[0]->buffer_size;
566 if ((status = mmal_port_send_buffer(ctx->decoder->input[0], mbuffer))) {
567 mmal_buffer_header_release(mbuffer);
568 av_buffer_unref(&buffer->ref);
571 // Remove from start of the list
572 ctx->waiting_buffers = buffer->next;
573 if (ctx->waiting_buffers_tail == buffer)
574 ctx->waiting_buffers_tail = NULL;
578 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending input\n", (int)status);
579 return AVERROR_UNKNOWN;
586 static int ffmal_copy_frame(AVCodecContext *avctx, AVFrame *frame,
587 MMAL_BUFFER_HEADER_T *buffer)
589 MMALDecodeContext *ctx = avctx->priv_data;
592 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
594 return AVERROR_UNKNOWN; // format change code failed with OOM previously
596 if ((ret = ff_decode_frame_props(avctx, frame)) < 0)
599 if ((ret = ffmmal_set_ref(frame, ctx->pool_out, buffer)) < 0)
602 int w = FFALIGN(avctx->width, 32);
603 int h = FFALIGN(avctx->height, 16);
608 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
611 ptr = buffer->data + buffer->type->video.offset[0];
612 for (i = 0; i < avctx->height; i++)
613 memcpy(frame->data[0] + frame->linesize[0] * i, ptr + w * i, avctx->width);
617 for (plane = 1; plane < 3; plane++) {
618 for (i = 0; i < avctx->height / 2; i++)
619 memcpy(frame->data[plane] + frame->linesize[plane] * i, ptr + w / 2 * i, (avctx->width + 1) / 2);
620 ptr += w / 2 * h / 2;
624 frame->pkt_pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
625 frame->pkt_dts = AV_NOPTS_VALUE;
631 // Fetch a decoded buffer and place it into the frame parameter.
632 static int ffmmal_read_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
634 MMALDecodeContext *ctx = avctx->priv_data;
635 MMAL_BUFFER_HEADER_T *buffer = NULL;
636 MMAL_STATUS_T status = 0;
639 if (ctx->eos_received)
643 // To ensure decoding in lockstep with a constant delay between fed packets
644 // and output frames, we always wait until an output buffer is available.
645 // Except during start we don't know after how many input packets the decoder
646 // is going to return the first buffer, and we can't distinguish decoder
647 // being busy from decoder waiting for input. So just poll at the start and
648 // keep feeding new data to the buffer.
649 // We are pretty sure the decoder will produce output if we sent more input
650 // frames than what a h264 decoder could logically delay. This avoids too
651 // excessive buffering.
652 // We also wait if we sent eos, but didn't receive it yet (think of decoding
653 // stream with a very low number of frames).
654 if (ctx->frames_output || ctx->packets_sent > MAX_DELAYED_FRAMES ||
655 (ctx->packets_sent && ctx->eos_sent)) {
656 // MMAL will ignore broken input packets, which means the frame we
657 // expect here may never arrive. Dealing with this correctly is
658 // complicated, so here's a hack to avoid that it freezes forever
659 // in this unlikely situation.
660 buffer = mmal_queue_timedwait(ctx->queue_decoded_frames, 100);
662 av_log(avctx, AV_LOG_ERROR, "Did not get output frame from MMAL.\n");
663 ret = AVERROR_UNKNOWN;
667 buffer = mmal_queue_get(ctx->queue_decoded_frames);
672 ctx->eos_received |= !!(buffer->flags & MMAL_BUFFER_HEADER_FLAG_EOS);
673 if (ctx->eos_received)
676 if (buffer->cmd == MMAL_EVENT_FORMAT_CHANGED) {
677 MMAL_COMPONENT_T *decoder = ctx->decoder;
678 MMAL_EVENT_FORMAT_CHANGED_T *ev = mmal_event_format_changed_get(buffer);
679 MMAL_BUFFER_HEADER_T *stale_buffer;
681 av_log(avctx, AV_LOG_INFO, "Changing output format.\n");
683 if ((status = mmal_port_disable(decoder->output[0])))
686 while ((stale_buffer = mmal_queue_get(ctx->queue_decoded_frames)))
687 mmal_buffer_header_release(stale_buffer);
689 mmal_format_copy(decoder->output[0]->format, ev->format);
691 if ((ret = ffmal_update_format(avctx)) < 0)
694 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
697 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
700 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
703 mmal_buffer_header_release(buffer);
705 } else if (buffer->cmd) {
707 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
708 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on output port\n", s);
710 } else if (buffer->length == 0) {
711 // Unused output buffer that got drained after format change.
712 mmal_buffer_header_release(buffer);
716 ctx->frames_output++;
718 if ((ret = ffmal_copy_frame(avctx, frame, buffer)) < 0)
727 mmal_buffer_header_release(buffer);
728 if (status && ret >= 0)
729 ret = AVERROR_UNKNOWN;
733 static int ffmmal_decode(AVCodecContext *avctx, void *data, int *got_frame,
736 AVFrame *frame = data;
739 if ((ret = ffmmal_add_packet(avctx, avpkt)) < 0)
742 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
745 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
748 if ((ret = ffmmal_read_frame(avctx, frame, got_frame)) < 0)
751 // ffmmal_read_frame() can block for a while. Since the decoder is
752 // asynchronous, it's a good idea to fill the ports again.
754 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
757 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
763 AVHWAccel ff_h264_mmal_hwaccel = {
765 .type = AVMEDIA_TYPE_VIDEO,
766 .id = AV_CODEC_ID_H264,
767 .pix_fmt = AV_PIX_FMT_MMAL,
770 static const AVOption options[]={
771 {"extra_buffers", "extra buffers", offsetof(MMALDecodeContext, extra_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
775 static const AVClass ffmmaldec_class = {
776 .class_name = "mmaldec",
778 .version = LIBAVUTIL_VERSION_INT,
781 AVCodec ff_h264_mmal_decoder = {
783 .long_name = NULL_IF_CONFIG_SMALL("h264 (mmal)"),
784 .type = AVMEDIA_TYPE_VIDEO,
785 .id = AV_CODEC_ID_H264,
786 .priv_data_size = sizeof(MMALDecodeContext),
787 .init = ffmmal_init_decoder,
788 .close = ffmmal_close_decoder,
789 .decode = ffmmal_decode,
790 .flush = ffmmal_flush,
791 .priv_class = &ffmmaldec_class,
792 .capabilities = AV_CODEC_CAP_DELAY,
793 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
794 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MMAL,