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>
34 #include <stdatomic.h>
38 #include "libavutil/avassert.h"
39 #include "libavutil/buffer.h"
40 #include "libavutil/common.h"
41 #include "libavutil/imgutils.h"
42 #include "libavutil/opt.h"
43 #include "libavutil/log.h"
45 typedef struct FFBufferEntry {
51 struct FFBufferEntry *next;
54 // MMAL_POOL_T destroys all of its MMAL_BUFFER_HEADER_Ts. If we want correct
55 // refcounting for AVFrames, we can free the MMAL_POOL_T only after all AVFrames
56 // have been unreferenced.
57 typedef struct FFPoolRef {
62 typedef struct FFBufferRef {
63 MMAL_BUFFER_HEADER_T *buffer;
67 typedef struct MMALDecodeContext {
70 int extra_decoder_buffers;
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 atomic_int packets_buffered;
87 int64_t frames_output;
93 // Assume decoder is guaranteed to produce output after at least this many
94 // packets (where each packet contains 1 frame).
95 #define MAX_DELAYED_FRAMES 16
97 static void ffmmal_poolref_unref(FFPoolRef *ref)
100 atomic_fetch_add_explicit(&ref->refcount, -1, memory_order_acq_rel) == 1) {
101 mmal_pool_destroy(ref->pool);
106 static void ffmmal_release_frame(void *opaque, uint8_t *data)
108 FFBufferRef *ref = (void *)data;
110 mmal_buffer_header_release(ref->buffer);
111 ffmmal_poolref_unref(ref->pool);
116 // Setup frame with a new reference to buffer. The buffer must have been
117 // allocated from the given pool.
118 static int ffmmal_set_ref(AVFrame *frame, FFPoolRef *pool,
119 MMAL_BUFFER_HEADER_T *buffer)
121 FFBufferRef *ref = av_mallocz(sizeof(*ref));
123 return AVERROR(ENOMEM);
126 ref->buffer = buffer;
128 frame->buf[0] = av_buffer_create((void *)ref, sizeof(*ref),
129 ffmmal_release_frame, NULL,
130 AV_BUFFER_FLAG_READONLY);
131 if (!frame->buf[0]) {
133 return AVERROR(ENOMEM);
136 atomic_fetch_add_explicit(&ref->pool->refcount, 1, memory_order_relaxed);
137 mmal_buffer_header_acquire(buffer);
139 frame->format = AV_PIX_FMT_MMAL;
140 frame->data[3] = (uint8_t *)ref->buffer;
144 static void ffmmal_stop_decoder(AVCodecContext *avctx)
146 MMALDecodeContext *ctx = avctx->priv_data;
147 MMAL_COMPONENT_T *decoder = ctx->decoder;
148 MMAL_BUFFER_HEADER_T *buffer;
150 mmal_port_disable(decoder->input[0]);
151 mmal_port_disable(decoder->output[0]);
152 mmal_port_disable(decoder->control);
154 mmal_port_flush(decoder->input[0]);
155 mmal_port_flush(decoder->output[0]);
156 mmal_port_flush(decoder->control);
158 while ((buffer = mmal_queue_get(ctx->queue_decoded_frames)))
159 mmal_buffer_header_release(buffer);
161 while (ctx->waiting_buffers) {
162 FFBufferEntry *buffer = ctx->waiting_buffers;
164 ctx->waiting_buffers = buffer->next;
166 if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
167 atomic_fetch_add(&ctx->packets_buffered, -1);
169 av_buffer_unref(&buffer->ref);
172 ctx->waiting_buffers_tail = NULL;
174 av_assert0(atomic_load(&ctx->packets_buffered) == 0);
176 ctx->frames_output = ctx->eos_received = ctx->eos_sent = ctx->packets_sent = ctx->extradata_sent = 0;
179 static av_cold int ffmmal_close_decoder(AVCodecContext *avctx)
181 MMALDecodeContext *ctx = avctx->priv_data;
184 ffmmal_stop_decoder(avctx);
186 mmal_component_destroy(ctx->decoder);
188 mmal_queue_destroy(ctx->queue_decoded_frames);
189 mmal_pool_destroy(ctx->pool_in);
190 ffmmal_poolref_unref(ctx->pool_out);
197 static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
199 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
200 MMALDecodeContext *ctx = avctx->priv_data;
203 FFBufferEntry *entry = buffer->user_data;
204 av_buffer_unref(&entry->ref);
205 if (entry->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
206 atomic_fetch_add(&ctx->packets_buffered, -1);
209 mmal_buffer_header_release(buffer);
212 static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
214 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
215 MMALDecodeContext *ctx = avctx->priv_data;
217 mmal_queue_put(ctx->queue_decoded_frames, buffer);
220 static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
222 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
223 MMAL_STATUS_T status;
225 if (buffer->cmd == MMAL_EVENT_ERROR) {
226 status = *(uint32_t *)buffer->data;
227 av_log(avctx, AV_LOG_ERROR, "MMAL error %d on control port\n", (int)status);
230 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
231 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on control port\n", s);
234 mmal_buffer_header_release(buffer);
237 // Feed free output buffers to the decoder.
238 static int ffmmal_fill_output_port(AVCodecContext *avctx)
240 MMALDecodeContext *ctx = avctx->priv_data;
241 MMAL_BUFFER_HEADER_T *buffer;
242 MMAL_STATUS_T status;
245 return AVERROR_UNKNOWN; // format change code failed with OOM previously
247 while ((buffer = mmal_queue_get(ctx->pool_out->pool->queue))) {
248 if ((status = mmal_port_send_buffer(ctx->decoder->output[0], buffer))) {
249 mmal_buffer_header_release(buffer);
250 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending output buffer.\n", (int)status);
251 return AVERROR_UNKNOWN;
258 static enum AVColorSpace ffmmal_csp_to_av_csp(MMAL_FOURCC_T fourcc)
261 case MMAL_COLOR_SPACE_BT470_2_BG:
262 case MMAL_COLOR_SPACE_BT470_2_M:
263 case MMAL_COLOR_SPACE_ITUR_BT601: return AVCOL_SPC_BT470BG;
264 case MMAL_COLOR_SPACE_ITUR_BT709: return AVCOL_SPC_BT709;
265 case MMAL_COLOR_SPACE_FCC: return AVCOL_SPC_FCC;
266 case MMAL_COLOR_SPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M;
267 default: return AVCOL_SPC_UNSPECIFIED;
271 static int ffmal_update_format(AVCodecContext *avctx)
273 MMALDecodeContext *ctx = avctx->priv_data;
274 MMAL_STATUS_T status;
276 MMAL_COMPONENT_T *decoder = ctx->decoder;
277 MMAL_ES_FORMAT_T *format_out = decoder->output[0]->format;
279 ffmmal_poolref_unref(ctx->pool_out);
280 if (!(ctx->pool_out = av_mallocz(sizeof(*ctx->pool_out)))) {
281 ret = AVERROR(ENOMEM);
284 atomic_store(&ctx->pool_out->refcount, 1);
289 if ((status = mmal_port_parameter_set_uint32(decoder->output[0], MMAL_PARAMETER_EXTRA_BUFFERS, ctx->extra_buffers)))
292 if ((status = mmal_port_parameter_set_boolean(decoder->output[0], MMAL_PARAMETER_VIDEO_INTERPOLATE_TIMESTAMPS, 0)))
295 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
296 format_out->encoding = MMAL_ENCODING_OPAQUE;
298 format_out->encoding_variant = format_out->encoding = MMAL_ENCODING_I420;
301 if ((status = mmal_port_format_commit(decoder->output[0])))
304 if ((ret = ff_set_dimensions(avctx, format_out->es->video.crop.x + format_out->es->video.crop.width,
305 format_out->es->video.crop.y + format_out->es->video.crop.height)) < 0)
308 if (format_out->es->video.par.num && format_out->es->video.par.den) {
309 avctx->sample_aspect_ratio.num = format_out->es->video.par.num;
310 avctx->sample_aspect_ratio.den = format_out->es->video.par.den;
313 avctx->colorspace = ffmmal_csp_to_av_csp(format_out->es->video.color_space);
315 decoder->output[0]->buffer_size =
316 FFMAX(decoder->output[0]->buffer_size_min, decoder->output[0]->buffer_size_recommended);
317 decoder->output[0]->buffer_num =
318 FFMAX(decoder->output[0]->buffer_num_min, decoder->output[0]->buffer_num_recommended) + ctx->extra_buffers;
319 ctx->pool_out->pool = mmal_pool_create(decoder->output[0]->buffer_num,
320 decoder->output[0]->buffer_size);
321 if (!ctx->pool_out->pool) {
322 ret = AVERROR(ENOMEM);
329 return ret < 0 ? ret : AVERROR_UNKNOWN;
332 static av_cold int ffmmal_init_decoder(AVCodecContext *avctx)
334 MMALDecodeContext *ctx = avctx->priv_data;
335 MMAL_STATUS_T status;
336 MMAL_ES_FORMAT_T *format_in;
337 MMAL_COMPONENT_T *decoder;
343 if (mmal_vc_init()) {
344 av_log(avctx, AV_LOG_ERROR, "Cannot initialize MMAL VC driver!\n");
345 return AVERROR(ENOSYS);
348 if ((ret = ff_get_format(avctx, avctx->codec->pix_fmts)) < 0)
351 avctx->pix_fmt = ret;
353 if ((status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_DECODER, &ctx->decoder)))
356 decoder = ctx->decoder;
358 format_in = decoder->input[0]->format;
359 format_in->type = MMAL_ES_TYPE_VIDEO;
360 switch (avctx->codec_id) {
361 case AV_CODEC_ID_MPEG2VIDEO:
362 format_in->encoding = MMAL_ENCODING_MP2V;
364 case AV_CODEC_ID_VC1:
365 format_in->encoding = MMAL_ENCODING_WVC1;
367 case AV_CODEC_ID_H264:
369 format_in->encoding = MMAL_ENCODING_H264;
372 format_in->es->video.width = FFALIGN(avctx->width, 32);
373 format_in->es->video.height = FFALIGN(avctx->height, 16);
374 format_in->es->video.crop.width = avctx->width;
375 format_in->es->video.crop.height = avctx->height;
376 format_in->es->video.frame_rate.num = 24000;
377 format_in->es->video.frame_rate.den = 1001;
378 format_in->es->video.par.num = avctx->sample_aspect_ratio.num;
379 format_in->es->video.par.den = avctx->sample_aspect_ratio.den;
380 format_in->flags = MMAL_ES_FORMAT_FLAG_FRAMED;
382 av_get_codec_tag_string(tmp, sizeof(tmp), format_in->encoding);
383 av_log(avctx, AV_LOG_DEBUG, "Using MMAL %s encoding.\n", tmp);
385 #if HAVE_MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
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");
392 if ((status = mmal_port_format_commit(decoder->input[0])))
395 decoder->input[0]->buffer_num =
396 FFMAX(decoder->input[0]->buffer_num_min, 20);
397 decoder->input[0]->buffer_size =
398 FFMAX(decoder->input[0]->buffer_size_min, 512 * 1024);
399 ctx->pool_in = mmal_pool_create(decoder->input[0]->buffer_num, 0);
401 ret = AVERROR(ENOMEM);
405 if ((ret = ffmal_update_format(avctx)) < 0)
408 ctx->queue_decoded_frames = mmal_queue_create();
409 if (!ctx->queue_decoded_frames)
412 decoder->input[0]->userdata = (void*)avctx;
413 decoder->output[0]->userdata = (void*)avctx;
414 decoder->control->userdata = (void*)avctx;
416 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
418 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
420 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
423 if ((status = mmal_component_enable(decoder)))
429 ffmmal_close_decoder(avctx);
430 return ret < 0 ? ret : AVERROR_UNKNOWN;
433 static void ffmmal_flush(AVCodecContext *avctx)
435 MMALDecodeContext *ctx = avctx->priv_data;
436 MMAL_COMPONENT_T *decoder = ctx->decoder;
437 MMAL_STATUS_T status;
439 ffmmal_stop_decoder(avctx);
441 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
443 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
445 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
451 av_log(avctx, AV_LOG_ERROR, "MMAL flush error: %i\n", (int)status);
454 // Split packets and add them to the waiting_buffers list. We don't queue them
455 // immediately, because it can happen that the decoder is temporarily blocked
456 // (due to us not reading/returning enough output buffers) and won't accept
457 // new input. (This wouldn't be an issue if MMAL input buffers always were
458 // complete frames - then the input buffer just would have to be big enough.)
459 // If is_extradata is set, send it as MMAL_BUFFER_HEADER_FLAG_CONFIG.
460 static int ffmmal_add_packet(AVCodecContext *avctx, AVPacket *avpkt,
463 MMALDecodeContext *ctx = avctx->priv_data;
464 AVBufferRef *buf = NULL;
466 uint8_t *data = (uint8_t *)"";
472 buf = av_buffer_ref(avpkt->buf);
476 buf = av_buffer_alloc(avpkt->size);
478 memcpy(buf->data, avpkt->data, avpkt->size);
484 ret = AVERROR(ENOMEM);
492 if (!ctx->packets_sent) {
493 // Short-cut the flush logic to avoid upsetting MMAL.
495 ctx->eos_received = 1;
503 FFBufferEntry *buffer = av_mallocz(sizeof(*buffer));
505 ret = AVERROR(ENOMEM);
510 buffer->length = FFMIN(size, ctx->decoder->input[0]->buffer_size);
513 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_CONFIG;
516 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_START;
518 data += buffer->length;
519 size -= buffer->length;
521 buffer->pts = avpkt->pts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->pts;
522 buffer->dts = avpkt->dts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->dts;
525 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_END;
526 atomic_fetch_add(&ctx->packets_buffered, 1);
529 if (!buffer->length) {
530 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
535 buffer->ref = av_buffer_ref(buf);
538 ret = AVERROR(ENOMEM);
543 // Insert at end of the list
544 if (!ctx->waiting_buffers)
545 ctx->waiting_buffers = buffer;
546 if (ctx->waiting_buffers_tail)
547 ctx->waiting_buffers_tail->next = buffer;
548 ctx->waiting_buffers_tail = buffer;
552 av_buffer_unref(&buf);
556 // Move prepared/split packets from waiting_buffers to the MMAL decoder.
557 static int ffmmal_fill_input_port(AVCodecContext *avctx)
559 MMALDecodeContext *ctx = avctx->priv_data;
561 while (ctx->waiting_buffers) {
562 MMAL_BUFFER_HEADER_T *mbuffer;
563 FFBufferEntry *buffer;
564 MMAL_STATUS_T status;
566 mbuffer = mmal_queue_get(ctx->pool_in->queue);
570 buffer = ctx->waiting_buffers;
572 mmal_buffer_header_reset(mbuffer);
574 mbuffer->pts = buffer->pts;
575 mbuffer->dts = buffer->dts;
576 mbuffer->flags = buffer->flags;
577 mbuffer->data = buffer->data;
578 mbuffer->length = buffer->length;
579 mbuffer->user_data = buffer;
580 mbuffer->alloc_size = ctx->decoder->input[0]->buffer_size;
582 // Remove from start of the list
583 ctx->waiting_buffers = buffer->next;
584 if (ctx->waiting_buffers_tail == buffer)
585 ctx->waiting_buffers_tail = NULL;
587 if ((status = mmal_port_send_buffer(ctx->decoder->input[0], mbuffer))) {
588 mmal_buffer_header_release(mbuffer);
589 av_buffer_unref(&buffer->ref);
590 if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
591 atomic_fetch_add(&ctx->packets_buffered, -1);
596 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending input\n", (int)status);
597 return AVERROR_UNKNOWN;
604 static int ffmal_copy_frame(AVCodecContext *avctx, AVFrame *frame,
605 MMAL_BUFFER_HEADER_T *buffer)
607 MMALDecodeContext *ctx = avctx->priv_data;
610 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
612 return AVERROR_UNKNOWN; // format change code failed with OOM previously
614 if ((ret = ff_decode_frame_props(avctx, frame)) < 0)
617 if ((ret = ffmmal_set_ref(frame, ctx->pool_out, buffer)) < 0)
620 int w = FFALIGN(avctx->width, 32);
621 int h = FFALIGN(avctx->height, 16);
625 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
628 av_image_fill_arrays(src, linesize,
629 buffer->data + buffer->type->video.offset[0],
630 avctx->pix_fmt, w, h, 1);
631 av_image_copy(frame->data, frame->linesize, src, linesize,
632 avctx->pix_fmt, avctx->width, avctx->height);
635 frame->pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
637 FF_DISABLE_DEPRECATION_WARNINGS
638 frame->pkt_pts = frame->pts;
639 FF_ENABLE_DEPRECATION_WARNINGS
641 frame->pkt_dts = AV_NOPTS_VALUE;
647 // Fetch a decoded buffer and place it into the frame parameter.
648 static int ffmmal_read_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
650 MMALDecodeContext *ctx = avctx->priv_data;
651 MMAL_BUFFER_HEADER_T *buffer = NULL;
652 MMAL_STATUS_T status = 0;
655 if (ctx->eos_received)
659 // To ensure decoding in lockstep with a constant delay between fed packets
660 // and output frames, we always wait until an output buffer is available.
661 // Except during start we don't know after how many input packets the decoder
662 // is going to return the first buffer, and we can't distinguish decoder
663 // being busy from decoder waiting for input. So just poll at the start and
664 // keep feeding new data to the buffer.
665 // We are pretty sure the decoder will produce output if we sent more input
666 // frames than what a H.264 decoder could logically delay. This avoids too
667 // excessive buffering.
668 // We also wait if we sent eos, but didn't receive it yet (think of decoding
669 // stream with a very low number of frames).
670 if (atomic_load(&ctx->packets_buffered) > MAX_DELAYED_FRAMES ||
671 (ctx->packets_sent && ctx->eos_sent)) {
672 // MMAL will ignore broken input packets, which means the frame we
673 // expect here may never arrive. Dealing with this correctly is
674 // complicated, so here's a hack to avoid that it freezes forever
675 // in this unlikely situation.
676 buffer = mmal_queue_timedwait(ctx->queue_decoded_frames, 100);
678 av_log(avctx, AV_LOG_ERROR, "Did not get output frame from MMAL.\n");
679 ret = AVERROR_UNKNOWN;
683 buffer = mmal_queue_get(ctx->queue_decoded_frames);
688 ctx->eos_received |= !!(buffer->flags & MMAL_BUFFER_HEADER_FLAG_EOS);
689 if (ctx->eos_received)
692 if (buffer->cmd == MMAL_EVENT_FORMAT_CHANGED) {
693 MMAL_COMPONENT_T *decoder = ctx->decoder;
694 MMAL_EVENT_FORMAT_CHANGED_T *ev = mmal_event_format_changed_get(buffer);
695 MMAL_BUFFER_HEADER_T *stale_buffer;
697 av_log(avctx, AV_LOG_INFO, "Changing output format.\n");
699 if ((status = mmal_port_disable(decoder->output[0])))
702 while ((stale_buffer = mmal_queue_get(ctx->queue_decoded_frames)))
703 mmal_buffer_header_release(stale_buffer);
705 mmal_format_copy(decoder->output[0]->format, ev->format);
707 if ((ret = ffmal_update_format(avctx)) < 0)
710 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
713 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
716 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
719 mmal_buffer_header_release(buffer);
721 } else if (buffer->cmd) {
723 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
724 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on output port\n", s);
726 } else if (buffer->length == 0) {
727 // Unused output buffer that got drained after format change.
728 mmal_buffer_header_release(buffer);
732 ctx->frames_output++;
734 if ((ret = ffmal_copy_frame(avctx, frame, buffer)) < 0)
743 mmal_buffer_header_release(buffer);
744 if (status && ret >= 0)
745 ret = AVERROR_UNKNOWN;
749 static int ffmmal_decode(AVCodecContext *avctx, void *data, int *got_frame,
752 MMALDecodeContext *ctx = avctx->priv_data;
753 AVFrame *frame = data;
756 if (avctx->extradata_size && !ctx->extradata_sent) {
758 av_init_packet(&pkt);
759 pkt.data = avctx->extradata;
760 pkt.size = avctx->extradata_size;
761 ctx->extradata_sent = 1;
762 if ((ret = ffmmal_add_packet(avctx, &pkt, 1)) < 0)
766 if ((ret = ffmmal_add_packet(avctx, avpkt, 0)) < 0)
769 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
772 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
775 if ((ret = ffmmal_read_frame(avctx, frame, got_frame)) < 0)
778 // ffmmal_read_frame() can block for a while. Since the decoder is
779 // asynchronous, it's a good idea to fill the ports again.
781 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
784 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
790 AVHWAccel ff_h264_mmal_hwaccel = {
792 .type = AVMEDIA_TYPE_VIDEO,
793 .id = AV_CODEC_ID_H264,
794 .pix_fmt = AV_PIX_FMT_MMAL,
797 AVHWAccel ff_mpeg2_mmal_hwaccel = {
798 .name = "mpeg2_mmal",
799 .type = AVMEDIA_TYPE_VIDEO,
800 .id = AV_CODEC_ID_MPEG2VIDEO,
801 .pix_fmt = AV_PIX_FMT_MMAL,
804 AVHWAccel ff_vc1_mmal_hwaccel = {
806 .type = AVMEDIA_TYPE_VIDEO,
807 .id = AV_CODEC_ID_VC1,
808 .pix_fmt = AV_PIX_FMT_MMAL,
811 static const AVOption options[]={
812 {"extra_buffers", "extra buffers", offsetof(MMALDecodeContext, extra_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
813 {"extra_decoder_buffers", "extra MMAL internal buffered frames", offsetof(MMALDecodeContext, extra_decoder_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
817 #define FFMMAL_DEC_CLASS(NAME) \
818 static const AVClass ffmmal_##NAME##_dec_class = { \
819 .class_name = "mmal_" #NAME "_dec", \
821 .version = LIBAVUTIL_VERSION_INT, \
824 #define FFMMAL_DEC(NAME, ID) \
825 FFMMAL_DEC_CLASS(NAME) \
826 AVCodec ff_##NAME##_mmal_decoder = { \
827 .name = #NAME "_mmal", \
828 .long_name = NULL_IF_CONFIG_SMALL(#NAME " (mmal)"), \
829 .type = AVMEDIA_TYPE_VIDEO, \
831 .priv_data_size = sizeof(MMALDecodeContext), \
832 .init = ffmmal_init_decoder, \
833 .close = ffmmal_close_decoder, \
834 .decode = ffmmal_decode, \
835 .flush = ffmmal_flush, \
836 .priv_class = &ffmmal_##NAME##_dec_class, \
837 .capabilities = AV_CODEC_CAP_DELAY, \
838 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS, \
839 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MMAL, \
840 AV_PIX_FMT_YUV420P, \
844 FFMMAL_DEC(h264, AV_CODEC_ID_H264)
845 FFMMAL_DEC(mpeg2, AV_CODEC_ID_MPEG2VIDEO)
846 FFMMAL_DEC(vc1, AV_CODEC_ID_VC1)