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 {
69 int extra_decoder_buffers;
71 MMAL_COMPONENT_T *decoder;
72 MMAL_QUEUE_T *queue_decoded_frames;
76 // Waiting input packets. Because the libavcodec API requires decoding and
77 // returning packets in lockstep, it can happen that queue_decoded_frames
78 // contains almost all surfaces - then the decoder input queue can quickly
79 // fill up and won't accept new input either. Without consuming input, the
80 // libavcodec API can't return new frames, and we have a logical deadlock.
81 // This is avoided by queuing such buffers here.
82 FFBufferEntry *waiting_buffers, *waiting_buffers_tail;
85 volatile int packets_buffered;
86 int64_t frames_output;
92 // Assume decoder is guaranteed to produce output after at least this many
93 // packets (where each packet contains 1 frame).
94 #define MAX_DELAYED_FRAMES 16
96 static void ffmmal_poolref_unref(FFPoolRef *ref)
98 if (ref && avpriv_atomic_int_add_and_fetch(&ref->refcount, -1) == 0) {
99 mmal_pool_destroy(ref->pool);
104 static void ffmmal_release_frame(void *opaque, uint8_t *data)
106 FFBufferRef *ref = (void *)data;
108 mmal_buffer_header_release(ref->buffer);
109 ffmmal_poolref_unref(ref->pool);
114 // Setup frame with a new reference to buffer. The buffer must have been
115 // allocated from the given pool.
116 static int ffmmal_set_ref(AVFrame *frame, FFPoolRef *pool,
117 MMAL_BUFFER_HEADER_T *buffer)
119 FFBufferRef *ref = av_mallocz(sizeof(*ref));
121 return AVERROR(ENOMEM);
124 ref->buffer = buffer;
126 frame->buf[0] = av_buffer_create((void *)ref, sizeof(*ref),
127 ffmmal_release_frame, NULL,
128 AV_BUFFER_FLAG_READONLY);
129 if (!frame->buf[0]) {
131 return AVERROR(ENOMEM);
134 avpriv_atomic_int_add_and_fetch(&ref->pool->refcount, 1);
135 mmal_buffer_header_acquire(buffer);
137 frame->format = AV_PIX_FMT_MMAL;
138 frame->data[3] = (uint8_t *)ref->buffer;
142 static void ffmmal_stop_decoder(AVCodecContext *avctx)
144 MMALDecodeContext *ctx = avctx->priv_data;
145 MMAL_COMPONENT_T *decoder = ctx->decoder;
146 MMAL_BUFFER_HEADER_T *buffer;
148 mmal_port_disable(decoder->input[0]);
149 mmal_port_disable(decoder->output[0]);
150 mmal_port_disable(decoder->control);
152 mmal_port_flush(decoder->input[0]);
153 mmal_port_flush(decoder->output[0]);
154 mmal_port_flush(decoder->control);
156 while ((buffer = mmal_queue_get(ctx->queue_decoded_frames)))
157 mmal_buffer_header_release(buffer);
159 while (ctx->waiting_buffers) {
160 FFBufferEntry *buffer = ctx->waiting_buffers;
162 ctx->waiting_buffers = buffer->next;
164 if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
165 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, -1);
167 av_buffer_unref(&buffer->ref);
170 ctx->waiting_buffers_tail = NULL;
172 av_assert0(avpriv_atomic_int_get(&ctx->packets_buffered) == 0);
174 ctx->frames_output = ctx->eos_received = ctx->eos_sent = ctx->packets_sent = ctx->extradata_sent = 0;
177 static av_cold int ffmmal_close_decoder(AVCodecContext *avctx)
179 MMALDecodeContext *ctx = avctx->priv_data;
182 ffmmal_stop_decoder(avctx);
184 mmal_component_destroy(ctx->decoder);
186 mmal_queue_destroy(ctx->queue_decoded_frames);
187 mmal_pool_destroy(ctx->pool_in);
188 ffmmal_poolref_unref(ctx->pool_out);
195 static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
197 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
198 MMALDecodeContext *ctx = avctx->priv_data;
201 FFBufferEntry *entry = buffer->user_data;
202 av_buffer_unref(&entry->ref);
203 if (entry->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
204 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, -1);
207 mmal_buffer_header_release(buffer);
210 static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
212 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
213 MMALDecodeContext *ctx = avctx->priv_data;
215 mmal_queue_put(ctx->queue_decoded_frames, buffer);
218 static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
220 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
221 MMAL_STATUS_T status;
223 if (buffer->cmd == MMAL_EVENT_ERROR) {
224 status = *(uint32_t *)buffer->data;
225 av_log(avctx, AV_LOG_ERROR, "MMAL error %d on control port\n", (int)status);
228 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
229 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on control port\n", s);
232 mmal_buffer_header_release(buffer);
235 // Feed free output buffers to the decoder.
236 static int ffmmal_fill_output_port(AVCodecContext *avctx)
238 MMALDecodeContext *ctx = avctx->priv_data;
239 MMAL_BUFFER_HEADER_T *buffer;
240 MMAL_STATUS_T status;
243 return AVERROR_UNKNOWN; // format change code failed with OOM previously
245 while ((buffer = mmal_queue_get(ctx->pool_out->pool->queue))) {
246 if ((status = mmal_port_send_buffer(ctx->decoder->output[0], buffer))) {
247 mmal_buffer_header_release(buffer);
248 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending output buffer.\n", (int)status);
249 return AVERROR_UNKNOWN;
256 static enum AVColorSpace ffmmal_csp_to_av_csp(MMAL_FOURCC_T fourcc)
259 case MMAL_COLOR_SPACE_BT470_2_BG:
260 case MMAL_COLOR_SPACE_BT470_2_M:
261 case MMAL_COLOR_SPACE_ITUR_BT601: return AVCOL_SPC_BT470BG;
262 case MMAL_COLOR_SPACE_ITUR_BT709: return AVCOL_SPC_BT709;
263 case MMAL_COLOR_SPACE_FCC: return AVCOL_SPC_FCC;
264 case MMAL_COLOR_SPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M;
265 default: return AVCOL_SPC_UNSPECIFIED;
269 static int ffmal_update_format(AVCodecContext *avctx)
271 MMALDecodeContext *ctx = avctx->priv_data;
272 MMAL_STATUS_T status;
274 MMAL_COMPONENT_T *decoder = ctx->decoder;
275 MMAL_ES_FORMAT_T *format_out = decoder->output[0]->format;
277 ffmmal_poolref_unref(ctx->pool_out);
278 if (!(ctx->pool_out = av_mallocz(sizeof(*ctx->pool_out)))) {
279 ret = AVERROR(ENOMEM);
282 ctx->pool_out->refcount = 1;
287 if ((status = mmal_port_parameter_set_uint32(decoder->output[0], MMAL_PARAMETER_EXTRA_BUFFERS, ctx->extra_buffers)))
290 if ((status = mmal_port_parameter_set_boolean(decoder->output[0], MMAL_PARAMETER_VIDEO_INTERPOLATE_TIMESTAMPS, 0)))
293 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
294 format_out->encoding = MMAL_ENCODING_OPAQUE;
296 format_out->encoding_variant = format_out->encoding = MMAL_ENCODING_I420;
299 if ((status = mmal_port_format_commit(decoder->output[0])))
302 if ((ret = ff_set_dimensions(avctx, format_out->es->video.crop.x + format_out->es->video.crop.width,
303 format_out->es->video.crop.y + format_out->es->video.crop.height)) < 0)
306 if (format_out->es->video.par.num && format_out->es->video.par.den) {
307 avctx->sample_aspect_ratio.num = format_out->es->video.par.num;
308 avctx->sample_aspect_ratio.den = format_out->es->video.par.den;
311 avctx->colorspace = ffmmal_csp_to_av_csp(format_out->es->video.color_space);
313 decoder->output[0]->buffer_size =
314 FFMAX(decoder->output[0]->buffer_size_min, decoder->output[0]->buffer_size_recommended);
315 decoder->output[0]->buffer_num =
316 FFMAX(decoder->output[0]->buffer_num_min, decoder->output[0]->buffer_num_recommended) + ctx->extra_buffers;
317 ctx->pool_out->pool = mmal_pool_create(decoder->output[0]->buffer_num,
318 decoder->output[0]->buffer_size);
319 if (!ctx->pool_out->pool) {
320 ret = AVERROR(ENOMEM);
327 return ret < 0 ? ret : AVERROR_UNKNOWN;
330 static av_cold int ffmmal_init_decoder(AVCodecContext *avctx)
332 MMALDecodeContext *ctx = avctx->priv_data;
333 MMAL_STATUS_T status;
334 MMAL_ES_FORMAT_T *format_in;
335 MMAL_COMPONENT_T *decoder;
341 if (mmal_vc_init()) {
342 av_log(avctx, AV_LOG_ERROR, "Cannot initialize MMAL VC driver!\n");
343 return AVERROR(ENOSYS);
346 if ((ret = ff_get_format(avctx, avctx->codec->pix_fmts)) < 0)
349 avctx->pix_fmt = ret;
351 if ((status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_DECODER, &ctx->decoder)))
354 decoder = ctx->decoder;
356 format_in = decoder->input[0]->format;
357 format_in->type = MMAL_ES_TYPE_VIDEO;
358 switch (avctx->codec_id) {
359 case AV_CODEC_ID_MPEG2VIDEO:
360 format_in->encoding = MMAL_ENCODING_MP2V;
362 case AV_CODEC_ID_MPEG4:
363 format_in->encoding = MMAL_ENCODING_MP4V;
365 case AV_CODEC_ID_VC1:
366 format_in->encoding = MMAL_ENCODING_WVC1;
368 case AV_CODEC_ID_H264:
370 format_in->encoding = MMAL_ENCODING_H264;
373 format_in->es->video.width = FFALIGN(avctx->width, 32);
374 format_in->es->video.height = FFALIGN(avctx->height, 16);
375 format_in->es->video.crop.width = avctx->width;
376 format_in->es->video.crop.height = avctx->height;
377 format_in->es->video.frame_rate.num = 24000;
378 format_in->es->video.frame_rate.den = 1001;
379 format_in->es->video.par.num = avctx->sample_aspect_ratio.num;
380 format_in->es->video.par.den = avctx->sample_aspect_ratio.den;
381 format_in->flags = MMAL_ES_FORMAT_FLAG_FRAMED;
383 av_get_codec_tag_string(tmp, sizeof(tmp), format_in->encoding);
384 av_log(avctx, AV_LOG_DEBUG, "Using MMAL %s encoding.\n", tmp);
386 if (mmal_port_parameter_set_uint32(decoder->input[0], MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS,
387 -1 - ctx->extra_decoder_buffers)) {
388 av_log(avctx, AV_LOG_WARNING, "Could not set input buffering limit.\n");
391 if ((status = mmal_port_format_commit(decoder->input[0])))
394 decoder->input[0]->buffer_num =
395 FFMAX(decoder->input[0]->buffer_num_min, 20);
396 decoder->input[0]->buffer_size =
397 FFMAX(decoder->input[0]->buffer_size_min, 512 * 1024);
398 ctx->pool_in = mmal_pool_create(decoder->input[0]->buffer_num, 0);
400 ret = AVERROR(ENOMEM);
404 if ((ret = ffmal_update_format(avctx)) < 0)
407 ctx->queue_decoded_frames = mmal_queue_create();
408 if (!ctx->queue_decoded_frames)
411 decoder->input[0]->userdata = (void*)avctx;
412 decoder->output[0]->userdata = (void*)avctx;
413 decoder->control->userdata = (void*)avctx;
415 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
417 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
419 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
422 if ((status = mmal_component_enable(decoder)))
428 ffmmal_close_decoder(avctx);
429 return ret < 0 ? ret : AVERROR_UNKNOWN;
432 static void ffmmal_flush(AVCodecContext *avctx)
434 MMALDecodeContext *ctx = avctx->priv_data;
435 MMAL_COMPONENT_T *decoder = ctx->decoder;
436 MMAL_STATUS_T status;
438 ffmmal_stop_decoder(avctx);
440 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
442 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
444 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
450 av_log(avctx, AV_LOG_ERROR, "MMAL flush error: %i\n", (int)status);
453 // Split packets and add them to the waiting_buffers list. We don't queue them
454 // immediately, because it can happen that the decoder is temporarily blocked
455 // (due to us not reading/returning enough output buffers) and won't accept
456 // new input. (This wouldn't be an issue if MMAL input buffers always were
457 // complete frames - then the input buffer just would have to be big enough.)
458 // If is_extradata is set, send it as MMAL_BUFFER_HEADER_FLAG_CONFIG.
459 static int ffmmal_add_packet(AVCodecContext *avctx, AVPacket *avpkt,
462 MMALDecodeContext *ctx = avctx->priv_data;
463 AVBufferRef *buf = NULL;
465 uint8_t *data = (uint8_t *)"";
471 buf = av_buffer_ref(avpkt->buf);
475 buf = av_buffer_alloc(avpkt->size);
477 memcpy(buf->data, avpkt->data, avpkt->size);
483 ret = AVERROR(ENOMEM);
491 if (!ctx->packets_sent) {
492 // Short-cut the flush logic to avoid upsetting MMAL.
494 ctx->eos_received = 1;
502 FFBufferEntry *buffer = av_mallocz(sizeof(*buffer));
504 ret = AVERROR(ENOMEM);
509 buffer->length = FFMIN(size, ctx->decoder->input[0]->buffer_size);
512 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_CONFIG;
515 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_START;
517 data += buffer->length;
518 size -= buffer->length;
520 buffer->pts = avpkt->pts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->pts;
521 buffer->dts = avpkt->dts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->dts;
524 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_END;
525 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, 1);
528 if (!buffer->length) {
529 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
534 buffer->ref = av_buffer_ref(buf);
537 ret = AVERROR(ENOMEM);
542 // Insert at end of the list
543 if (!ctx->waiting_buffers)
544 ctx->waiting_buffers = buffer;
545 if (ctx->waiting_buffers_tail)
546 ctx->waiting_buffers_tail->next = buffer;
547 ctx->waiting_buffers_tail = buffer;
551 av_buffer_unref(&buf);
555 // Move prepared/split packets from waiting_buffers to the MMAL decoder.
556 static int ffmmal_fill_input_port(AVCodecContext *avctx)
558 MMALDecodeContext *ctx = avctx->priv_data;
560 while (ctx->waiting_buffers) {
561 MMAL_BUFFER_HEADER_T *mbuffer;
562 FFBufferEntry *buffer;
563 MMAL_STATUS_T status;
565 mbuffer = mmal_queue_get(ctx->pool_in->queue);
569 buffer = ctx->waiting_buffers;
571 mmal_buffer_header_reset(mbuffer);
573 mbuffer->pts = buffer->pts;
574 mbuffer->dts = buffer->dts;
575 mbuffer->flags = buffer->flags;
576 mbuffer->data = buffer->data;
577 mbuffer->length = buffer->length;
578 mbuffer->user_data = buffer;
579 mbuffer->alloc_size = ctx->decoder->input[0]->buffer_size;
581 // Remove from start of the list
582 ctx->waiting_buffers = buffer->next;
583 if (ctx->waiting_buffers_tail == buffer)
584 ctx->waiting_buffers_tail = NULL;
586 if ((status = mmal_port_send_buffer(ctx->decoder->input[0], mbuffer))) {
587 mmal_buffer_header_release(mbuffer);
588 av_buffer_unref(&buffer->ref);
589 if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
590 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, -1);
595 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending input\n", (int)status);
596 return AVERROR_UNKNOWN;
603 static int ffmal_copy_frame(AVCodecContext *avctx, AVFrame *frame,
604 MMAL_BUFFER_HEADER_T *buffer)
606 MMALDecodeContext *ctx = avctx->priv_data;
609 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
611 return AVERROR_UNKNOWN; // format change code failed with OOM previously
613 if ((ret = ff_decode_frame_props(avctx, frame)) < 0)
616 if ((ret = ffmmal_set_ref(frame, ctx->pool_out, buffer)) < 0)
619 int w = FFALIGN(avctx->width, 32);
620 int h = FFALIGN(avctx->height, 16);
625 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
628 ptr = buffer->data + buffer->type->video.offset[0];
629 for (i = 0; i < avctx->height; i++)
630 memcpy(frame->data[0] + frame->linesize[0] * i, ptr + w * i, avctx->width);
634 for (plane = 1; plane < 3; plane++) {
635 for (i = 0; i < avctx->height / 2; i++)
636 memcpy(frame->data[plane] + frame->linesize[plane] * i, ptr + w / 2 * i, (avctx->width + 1) / 2);
637 ptr += w / 2 * h / 2;
641 frame->pkt_pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
642 frame->pkt_dts = AV_NOPTS_VALUE;
648 // Fetch a decoded buffer and place it into the frame parameter.
649 static int ffmmal_read_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
651 MMALDecodeContext *ctx = avctx->priv_data;
652 MMAL_BUFFER_HEADER_T *buffer = NULL;
653 MMAL_STATUS_T status = 0;
656 if (ctx->eos_received)
660 // To ensure decoding in lockstep with a constant delay between fed packets
661 // and output frames, we always wait until an output buffer is available.
662 // Except during start we don't know after how many input packets the decoder
663 // is going to return the first buffer, and we can't distinguish decoder
664 // being busy from decoder waiting for input. So just poll at the start and
665 // keep feeding new data to the buffer.
666 // We are pretty sure the decoder will produce output if we sent more input
667 // frames than what a h264 decoder could logically delay. This avoids too
668 // excessive buffering.
669 // We also wait if we sent eos, but didn't receive it yet (think of decoding
670 // stream with a very low number of frames).
671 if (avpriv_atomic_int_get(&ctx->packets_buffered) > MAX_DELAYED_FRAMES ||
672 (ctx->packets_sent && ctx->eos_sent)) {
673 // MMAL will ignore broken input packets, which means the frame we
674 // expect here may never arrive. Dealing with this correctly is
675 // complicated, so here's a hack to avoid that it freezes forever
676 // in this unlikely situation.
677 buffer = mmal_queue_timedwait(ctx->queue_decoded_frames, 100);
679 av_log(avctx, AV_LOG_ERROR, "Did not get output frame from MMAL.\n");
680 ret = AVERROR_UNKNOWN;
684 buffer = mmal_queue_get(ctx->queue_decoded_frames);
689 ctx->eos_received |= !!(buffer->flags & MMAL_BUFFER_HEADER_FLAG_EOS);
690 if (ctx->eos_received)
693 if (buffer->cmd == MMAL_EVENT_FORMAT_CHANGED) {
694 MMAL_COMPONENT_T *decoder = ctx->decoder;
695 MMAL_EVENT_FORMAT_CHANGED_T *ev = mmal_event_format_changed_get(buffer);
696 MMAL_BUFFER_HEADER_T *stale_buffer;
698 av_log(avctx, AV_LOG_INFO, "Changing output format.\n");
700 if ((status = mmal_port_disable(decoder->output[0])))
703 while ((stale_buffer = mmal_queue_get(ctx->queue_decoded_frames)))
704 mmal_buffer_header_release(stale_buffer);
706 mmal_format_copy(decoder->output[0]->format, ev->format);
708 if ((ret = ffmal_update_format(avctx)) < 0)
711 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
714 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
717 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
720 mmal_buffer_header_release(buffer);
722 } else if (buffer->cmd) {
724 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
725 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on output port\n", s);
727 } else if (buffer->length == 0) {
728 // Unused output buffer that got drained after format change.
729 mmal_buffer_header_release(buffer);
733 ctx->frames_output++;
735 if ((ret = ffmal_copy_frame(avctx, frame, buffer)) < 0)
744 mmal_buffer_header_release(buffer);
745 if (status && ret >= 0)
746 ret = AVERROR_UNKNOWN;
750 static int ffmmal_decode(AVCodecContext *avctx, void *data, int *got_frame,
753 MMALDecodeContext *ctx = avctx->priv_data;
754 AVFrame *frame = data;
757 if (avctx->extradata_size && !ctx->extradata_sent) {
759 av_init_packet(&pkt);
760 pkt.data = avctx->extradata;
761 pkt.size = avctx->extradata_size;
762 ctx->extradata_sent = 1;
763 if ((ret = ffmmal_add_packet(avctx, &pkt, 1)) < 0)
767 if ((ret = ffmmal_add_packet(avctx, avpkt, 0)) < 0)
770 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
773 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
776 if ((ret = ffmmal_read_frame(avctx, frame, got_frame)) < 0)
779 // ffmmal_read_frame() can block for a while. Since the decoder is
780 // asynchronous, it's a good idea to fill the ports again.
782 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
785 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
791 AVHWAccel ff_h264_mmal_hwaccel = {
793 .type = AVMEDIA_TYPE_VIDEO,
794 .id = AV_CODEC_ID_H264,
795 .pix_fmt = AV_PIX_FMT_MMAL,
798 AVHWAccel ff_mpeg2_mmal_hwaccel = {
799 .name = "mpeg2_mmal",
800 .type = AVMEDIA_TYPE_VIDEO,
801 .id = AV_CODEC_ID_MPEG2VIDEO,
802 .pix_fmt = AV_PIX_FMT_MMAL,
805 AVHWAccel ff_mpeg4_mmal_hwaccel = {
806 .name = "mpeg4_mmal",
807 .type = AVMEDIA_TYPE_VIDEO,
808 .id = AV_CODEC_ID_MPEG4,
809 .pix_fmt = AV_PIX_FMT_MMAL,
812 AVHWAccel ff_vc1_mmal_hwaccel = {
814 .type = AVMEDIA_TYPE_VIDEO,
815 .id = AV_CODEC_ID_VC1,
816 .pix_fmt = AV_PIX_FMT_MMAL,
819 static const AVOption options[]={
820 {"extra_buffers", "extra buffers", offsetof(MMALDecodeContext, extra_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
821 {"extra_decoder_buffers", "extra MMAL internal buffered frames", offsetof(MMALDecodeContext, extra_decoder_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
825 #define FFMMAL_DEC_CLASS(NAME) \
826 static const AVClass ffmmal_##NAME##_dec_class = { \
827 .class_name = "mmal_" #NAME "_dec", \
829 .version = LIBAVUTIL_VERSION_INT, \
832 #define FFMMAL_DEC(NAME, ID) \
833 FFMMAL_DEC_CLASS(NAME) \
834 AVCodec ff_##NAME##_mmal_decoder = { \
835 .name = #NAME "_mmal", \
836 .long_name = NULL_IF_CONFIG_SMALL(#NAME " (mmal)"), \
837 .type = AVMEDIA_TYPE_VIDEO, \
839 .priv_data_size = sizeof(MMALDecodeContext), \
840 .init = ffmmal_init_decoder, \
841 .close = ffmmal_close_decoder, \
842 .decode = ffmmal_decode, \
843 .flush = ffmmal_flush, \
844 .priv_class = &ffmmal_##NAME##_dec_class, \
845 .capabilities = AV_CODEC_CAP_DELAY, \
846 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS, \
847 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MMAL, \
848 AV_PIX_FMT_YUV420P, \
852 FFMMAL_DEC(h264, AV_CODEC_ID_H264)
853 FFMMAL_DEC(mpeg2, AV_CODEC_ID_MPEG2VIDEO)
854 FFMMAL_DEC(mpeg4, AV_CODEC_ID_MPEG4)
855 FFMMAL_DEC(vc1, AV_CODEC_ID_VC1)