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/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 {
58 volatile int refcount;
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 volatile 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)
99 if (ref && avpriv_atomic_int_add_and_fetch(&ref->refcount, -1) == 0) {
100 mmal_pool_destroy(ref->pool);
105 static void ffmmal_release_frame(void *opaque, uint8_t *data)
107 FFBufferRef *ref = (void *)data;
109 mmal_buffer_header_release(ref->buffer);
110 ffmmal_poolref_unref(ref->pool);
115 // Setup frame with a new reference to buffer. The buffer must have been
116 // allocated from the given pool.
117 static int ffmmal_set_ref(AVFrame *frame, FFPoolRef *pool,
118 MMAL_BUFFER_HEADER_T *buffer)
120 FFBufferRef *ref = av_mallocz(sizeof(*ref));
122 return AVERROR(ENOMEM);
125 ref->buffer = buffer;
127 frame->buf[0] = av_buffer_create((void *)ref, sizeof(*ref),
128 ffmmal_release_frame, NULL,
129 AV_BUFFER_FLAG_READONLY);
130 if (!frame->buf[0]) {
132 return AVERROR(ENOMEM);
135 avpriv_atomic_int_add_and_fetch(&ref->pool->refcount, 1);
136 mmal_buffer_header_acquire(buffer);
138 frame->format = AV_PIX_FMT_MMAL;
139 frame->data[3] = (uint8_t *)ref->buffer;
143 static void ffmmal_stop_decoder(AVCodecContext *avctx)
145 MMALDecodeContext *ctx = avctx->priv_data;
146 MMAL_COMPONENT_T *decoder = ctx->decoder;
147 MMAL_BUFFER_HEADER_T *buffer;
149 mmal_port_disable(decoder->input[0]);
150 mmal_port_disable(decoder->output[0]);
151 mmal_port_disable(decoder->control);
153 mmal_port_flush(decoder->input[0]);
154 mmal_port_flush(decoder->output[0]);
155 mmal_port_flush(decoder->control);
157 while ((buffer = mmal_queue_get(ctx->queue_decoded_frames)))
158 mmal_buffer_header_release(buffer);
160 while (ctx->waiting_buffers) {
161 FFBufferEntry *buffer = ctx->waiting_buffers;
163 ctx->waiting_buffers = buffer->next;
165 if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
166 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, -1);
168 av_buffer_unref(&buffer->ref);
171 ctx->waiting_buffers_tail = NULL;
173 av_assert0(avpriv_atomic_int_get(&ctx->packets_buffered) == 0);
175 ctx->frames_output = ctx->eos_received = ctx->eos_sent = ctx->packets_sent = ctx->extradata_sent = 0;
178 static av_cold int ffmmal_close_decoder(AVCodecContext *avctx)
180 MMALDecodeContext *ctx = avctx->priv_data;
183 ffmmal_stop_decoder(avctx);
185 mmal_component_destroy(ctx->decoder);
187 mmal_queue_destroy(ctx->queue_decoded_frames);
188 mmal_pool_destroy(ctx->pool_in);
189 ffmmal_poolref_unref(ctx->pool_out);
196 static void input_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
198 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
199 MMALDecodeContext *ctx = avctx->priv_data;
202 FFBufferEntry *entry = buffer->user_data;
203 av_buffer_unref(&entry->ref);
204 if (entry->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
205 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, -1);
208 mmal_buffer_header_release(buffer);
211 static void output_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
213 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
214 MMALDecodeContext *ctx = avctx->priv_data;
216 mmal_queue_put(ctx->queue_decoded_frames, buffer);
219 static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
221 AVCodecContext *avctx = (AVCodecContext*)port->userdata;
222 MMAL_STATUS_T status;
224 if (buffer->cmd == MMAL_EVENT_ERROR) {
225 status = *(uint32_t *)buffer->data;
226 av_log(avctx, AV_LOG_ERROR, "MMAL error %d on control port\n", (int)status);
229 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
230 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on control port\n", s);
233 mmal_buffer_header_release(buffer);
236 // Feed free output buffers to the decoder.
237 static int ffmmal_fill_output_port(AVCodecContext *avctx)
239 MMALDecodeContext *ctx = avctx->priv_data;
240 MMAL_BUFFER_HEADER_T *buffer;
241 MMAL_STATUS_T status;
244 return AVERROR_UNKNOWN; // format change code failed with OOM previously
246 while ((buffer = mmal_queue_get(ctx->pool_out->pool->queue))) {
247 if ((status = mmal_port_send_buffer(ctx->decoder->output[0], buffer))) {
248 mmal_buffer_header_release(buffer);
249 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending output buffer.\n", (int)status);
250 return AVERROR_UNKNOWN;
257 static enum AVColorSpace ffmmal_csp_to_av_csp(MMAL_FOURCC_T fourcc)
260 case MMAL_COLOR_SPACE_BT470_2_BG:
261 case MMAL_COLOR_SPACE_BT470_2_M:
262 case MMAL_COLOR_SPACE_ITUR_BT601: return AVCOL_SPC_BT470BG;
263 case MMAL_COLOR_SPACE_ITUR_BT709: return AVCOL_SPC_BT709;
264 case MMAL_COLOR_SPACE_FCC: return AVCOL_SPC_FCC;
265 case MMAL_COLOR_SPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M;
266 default: return AVCOL_SPC_UNSPECIFIED;
270 static int ffmal_update_format(AVCodecContext *avctx)
272 MMALDecodeContext *ctx = avctx->priv_data;
273 MMAL_STATUS_T status;
275 MMAL_COMPONENT_T *decoder = ctx->decoder;
276 MMAL_ES_FORMAT_T *format_out = decoder->output[0]->format;
278 ffmmal_poolref_unref(ctx->pool_out);
279 if (!(ctx->pool_out = av_mallocz(sizeof(*ctx->pool_out)))) {
280 ret = AVERROR(ENOMEM);
283 ctx->pool_out->refcount = 1;
288 if ((status = mmal_port_parameter_set_uint32(decoder->output[0], MMAL_PARAMETER_EXTRA_BUFFERS, ctx->extra_buffers)))
291 if ((status = mmal_port_parameter_set_boolean(decoder->output[0], MMAL_PARAMETER_VIDEO_INTERPOLATE_TIMESTAMPS, 0)))
294 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
295 format_out->encoding = MMAL_ENCODING_OPAQUE;
297 format_out->encoding_variant = format_out->encoding = MMAL_ENCODING_I420;
300 if ((status = mmal_port_format_commit(decoder->output[0])))
303 if ((ret = ff_set_dimensions(avctx, format_out->es->video.crop.x + format_out->es->video.crop.width,
304 format_out->es->video.crop.y + format_out->es->video.crop.height)) < 0)
307 if (format_out->es->video.par.num && format_out->es->video.par.den) {
308 avctx->sample_aspect_ratio.num = format_out->es->video.par.num;
309 avctx->sample_aspect_ratio.den = format_out->es->video.par.den;
312 avctx->colorspace = ffmmal_csp_to_av_csp(format_out->es->video.color_space);
314 decoder->output[0]->buffer_size =
315 FFMAX(decoder->output[0]->buffer_size_min, decoder->output[0]->buffer_size_recommended);
316 decoder->output[0]->buffer_num =
317 FFMAX(decoder->output[0]->buffer_num_min, decoder->output[0]->buffer_num_recommended) + ctx->extra_buffers;
318 ctx->pool_out->pool = mmal_pool_create(decoder->output[0]->buffer_num,
319 decoder->output[0]->buffer_size);
320 if (!ctx->pool_out->pool) {
321 ret = AVERROR(ENOMEM);
328 return ret < 0 ? ret : AVERROR_UNKNOWN;
331 static av_cold int ffmmal_init_decoder(AVCodecContext *avctx)
333 MMALDecodeContext *ctx = avctx->priv_data;
334 MMAL_STATUS_T status;
335 MMAL_ES_FORMAT_T *format_in;
336 MMAL_COMPONENT_T *decoder;
342 if (mmal_vc_init()) {
343 av_log(avctx, AV_LOG_ERROR, "Cannot initialize MMAL VC driver!\n");
344 return AVERROR(ENOSYS);
347 if ((ret = ff_get_format(avctx, avctx->codec->pix_fmts)) < 0)
350 avctx->pix_fmt = ret;
352 if ((status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_DECODER, &ctx->decoder)))
355 decoder = ctx->decoder;
357 format_in = decoder->input[0]->format;
358 format_in->type = MMAL_ES_TYPE_VIDEO;
359 switch (avctx->codec_id) {
360 case AV_CODEC_ID_MPEG2VIDEO:
361 format_in->encoding = MMAL_ENCODING_MP2V;
363 case AV_CODEC_ID_MPEG4:
364 format_in->encoding = MMAL_ENCODING_MP4V;
366 case AV_CODEC_ID_VC1:
367 format_in->encoding = MMAL_ENCODING_WVC1;
369 case AV_CODEC_ID_H264:
371 format_in->encoding = MMAL_ENCODING_H264;
374 format_in->es->video.width = FFALIGN(avctx->width, 32);
375 format_in->es->video.height = FFALIGN(avctx->height, 16);
376 format_in->es->video.crop.width = avctx->width;
377 format_in->es->video.crop.height = avctx->height;
378 format_in->es->video.frame_rate.num = 24000;
379 format_in->es->video.frame_rate.den = 1001;
380 format_in->es->video.par.num = avctx->sample_aspect_ratio.num;
381 format_in->es->video.par.den = avctx->sample_aspect_ratio.den;
382 format_in->flags = MMAL_ES_FORMAT_FLAG_FRAMED;
384 av_get_codec_tag_string(tmp, sizeof(tmp), format_in->encoding);
385 av_log(avctx, AV_LOG_DEBUG, "Using MMAL %s encoding.\n", tmp);
387 #if HAVE_MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
388 if (mmal_port_parameter_set_uint32(decoder->input[0], MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS,
389 -1 - ctx->extra_decoder_buffers)) {
390 av_log(avctx, AV_LOG_WARNING, "Could not set input buffering limit.\n");
394 if ((status = mmal_port_format_commit(decoder->input[0])))
397 decoder->input[0]->buffer_num =
398 FFMAX(decoder->input[0]->buffer_num_min, 20);
399 decoder->input[0]->buffer_size =
400 FFMAX(decoder->input[0]->buffer_size_min, 512 * 1024);
401 ctx->pool_in = mmal_pool_create(decoder->input[0]->buffer_num, 0);
403 ret = AVERROR(ENOMEM);
407 if ((ret = ffmal_update_format(avctx)) < 0)
410 ctx->queue_decoded_frames = mmal_queue_create();
411 if (!ctx->queue_decoded_frames)
414 decoder->input[0]->userdata = (void*)avctx;
415 decoder->output[0]->userdata = (void*)avctx;
416 decoder->control->userdata = (void*)avctx;
418 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
420 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
422 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
425 if ((status = mmal_component_enable(decoder)))
431 ffmmal_close_decoder(avctx);
432 return ret < 0 ? ret : AVERROR_UNKNOWN;
435 static void ffmmal_flush(AVCodecContext *avctx)
437 MMALDecodeContext *ctx = avctx->priv_data;
438 MMAL_COMPONENT_T *decoder = ctx->decoder;
439 MMAL_STATUS_T status;
441 ffmmal_stop_decoder(avctx);
443 if ((status = mmal_port_enable(decoder->control, control_port_cb)))
445 if ((status = mmal_port_enable(decoder->input[0], input_callback)))
447 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
453 av_log(avctx, AV_LOG_ERROR, "MMAL flush error: %i\n", (int)status);
456 // Split packets and add them to the waiting_buffers list. We don't queue them
457 // immediately, because it can happen that the decoder is temporarily blocked
458 // (due to us not reading/returning enough output buffers) and won't accept
459 // new input. (This wouldn't be an issue if MMAL input buffers always were
460 // complete frames - then the input buffer just would have to be big enough.)
461 // If is_extradata is set, send it as MMAL_BUFFER_HEADER_FLAG_CONFIG.
462 static int ffmmal_add_packet(AVCodecContext *avctx, AVPacket *avpkt,
465 MMALDecodeContext *ctx = avctx->priv_data;
466 AVBufferRef *buf = NULL;
468 uint8_t *data = (uint8_t *)"";
474 buf = av_buffer_ref(avpkt->buf);
478 buf = av_buffer_alloc(avpkt->size);
480 memcpy(buf->data, avpkt->data, avpkt->size);
486 ret = AVERROR(ENOMEM);
494 if (!ctx->packets_sent) {
495 // Short-cut the flush logic to avoid upsetting MMAL.
497 ctx->eos_received = 1;
505 FFBufferEntry *buffer = av_mallocz(sizeof(*buffer));
507 ret = AVERROR(ENOMEM);
512 buffer->length = FFMIN(size, ctx->decoder->input[0]->buffer_size);
515 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_CONFIG;
518 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_START;
520 data += buffer->length;
521 size -= buffer->length;
523 buffer->pts = avpkt->pts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->pts;
524 buffer->dts = avpkt->dts == AV_NOPTS_VALUE ? MMAL_TIME_UNKNOWN : avpkt->dts;
527 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_END;
528 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, 1);
531 if (!buffer->length) {
532 buffer->flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
537 buffer->ref = av_buffer_ref(buf);
540 ret = AVERROR(ENOMEM);
545 // Insert at end of the list
546 if (!ctx->waiting_buffers)
547 ctx->waiting_buffers = buffer;
548 if (ctx->waiting_buffers_tail)
549 ctx->waiting_buffers_tail->next = buffer;
550 ctx->waiting_buffers_tail = buffer;
554 av_buffer_unref(&buf);
558 // Move prepared/split packets from waiting_buffers to the MMAL decoder.
559 static int ffmmal_fill_input_port(AVCodecContext *avctx)
561 MMALDecodeContext *ctx = avctx->priv_data;
563 while (ctx->waiting_buffers) {
564 MMAL_BUFFER_HEADER_T *mbuffer;
565 FFBufferEntry *buffer;
566 MMAL_STATUS_T status;
568 mbuffer = mmal_queue_get(ctx->pool_in->queue);
572 buffer = ctx->waiting_buffers;
574 mmal_buffer_header_reset(mbuffer);
576 mbuffer->pts = buffer->pts;
577 mbuffer->dts = buffer->dts;
578 mbuffer->flags = buffer->flags;
579 mbuffer->data = buffer->data;
580 mbuffer->length = buffer->length;
581 mbuffer->user_data = buffer;
582 mbuffer->alloc_size = ctx->decoder->input[0]->buffer_size;
584 // Remove from start of the list
585 ctx->waiting_buffers = buffer->next;
586 if (ctx->waiting_buffers_tail == buffer)
587 ctx->waiting_buffers_tail = NULL;
589 if ((status = mmal_port_send_buffer(ctx->decoder->input[0], mbuffer))) {
590 mmal_buffer_header_release(mbuffer);
591 av_buffer_unref(&buffer->ref);
592 if (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)
593 avpriv_atomic_int_add_and_fetch(&ctx->packets_buffered, -1);
598 av_log(avctx, AV_LOG_ERROR, "MMAL error %d when sending input\n", (int)status);
599 return AVERROR_UNKNOWN;
606 static int ffmal_copy_frame(AVCodecContext *avctx, AVFrame *frame,
607 MMAL_BUFFER_HEADER_T *buffer)
609 MMALDecodeContext *ctx = avctx->priv_data;
612 if (avctx->pix_fmt == AV_PIX_FMT_MMAL) {
614 return AVERROR_UNKNOWN; // format change code failed with OOM previously
616 if ((ret = ff_decode_frame_props(avctx, frame)) < 0)
619 if ((ret = ffmmal_set_ref(frame, ctx->pool_out, buffer)) < 0)
622 int w = FFALIGN(avctx->width, 32);
623 int h = FFALIGN(avctx->height, 16);
627 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
630 av_image_fill_arrays(src, linesize,
631 buffer->data + buffer->type->video.offset[0],
632 avctx->pix_fmt, w, h, 1);
633 av_image_copy(frame->data, frame->linesize, src, linesize,
634 avctx->pix_fmt, avctx->width, avctx->height);
637 frame->pkt_pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
638 frame->pkt_dts = AV_NOPTS_VALUE;
644 // Fetch a decoded buffer and place it into the frame parameter.
645 static int ffmmal_read_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
647 MMALDecodeContext *ctx = avctx->priv_data;
648 MMAL_BUFFER_HEADER_T *buffer = NULL;
649 MMAL_STATUS_T status = 0;
652 if (ctx->eos_received)
656 // To ensure decoding in lockstep with a constant delay between fed packets
657 // and output frames, we always wait until an output buffer is available.
658 // Except during start we don't know after how many input packets the decoder
659 // is going to return the first buffer, and we can't distinguish decoder
660 // being busy from decoder waiting for input. So just poll at the start and
661 // keep feeding new data to the buffer.
662 // We are pretty sure the decoder will produce output if we sent more input
663 // frames than what a H.264 decoder could logically delay. This avoids too
664 // excessive buffering.
665 // We also wait if we sent eos, but didn't receive it yet (think of decoding
666 // stream with a very low number of frames).
667 if (avpriv_atomic_int_get(&ctx->packets_buffered) > MAX_DELAYED_FRAMES ||
668 (ctx->packets_sent && ctx->eos_sent)) {
669 // MMAL will ignore broken input packets, which means the frame we
670 // expect here may never arrive. Dealing with this correctly is
671 // complicated, so here's a hack to avoid that it freezes forever
672 // in this unlikely situation.
673 buffer = mmal_queue_timedwait(ctx->queue_decoded_frames, 100);
675 av_log(avctx, AV_LOG_ERROR, "Did not get output frame from MMAL.\n");
676 ret = AVERROR_UNKNOWN;
680 buffer = mmal_queue_get(ctx->queue_decoded_frames);
685 ctx->eos_received |= !!(buffer->flags & MMAL_BUFFER_HEADER_FLAG_EOS);
686 if (ctx->eos_received)
689 if (buffer->cmd == MMAL_EVENT_FORMAT_CHANGED) {
690 MMAL_COMPONENT_T *decoder = ctx->decoder;
691 MMAL_EVENT_FORMAT_CHANGED_T *ev = mmal_event_format_changed_get(buffer);
692 MMAL_BUFFER_HEADER_T *stale_buffer;
694 av_log(avctx, AV_LOG_INFO, "Changing output format.\n");
696 if ((status = mmal_port_disable(decoder->output[0])))
699 while ((stale_buffer = mmal_queue_get(ctx->queue_decoded_frames)))
700 mmal_buffer_header_release(stale_buffer);
702 mmal_format_copy(decoder->output[0]->format, ev->format);
704 if ((ret = ffmal_update_format(avctx)) < 0)
707 if ((status = mmal_port_enable(decoder->output[0], output_callback)))
710 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
713 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
716 mmal_buffer_header_release(buffer);
718 } else if (buffer->cmd) {
720 av_get_codec_tag_string(s, sizeof(s), buffer->cmd);
721 av_log(avctx, AV_LOG_WARNING, "Unknown MMAL event %s on output port\n", s);
723 } else if (buffer->length == 0) {
724 // Unused output buffer that got drained after format change.
725 mmal_buffer_header_release(buffer);
729 ctx->frames_output++;
731 if ((ret = ffmal_copy_frame(avctx, frame, buffer)) < 0)
740 mmal_buffer_header_release(buffer);
741 if (status && ret >= 0)
742 ret = AVERROR_UNKNOWN;
746 static int ffmmal_decode(AVCodecContext *avctx, void *data, int *got_frame,
749 MMALDecodeContext *ctx = avctx->priv_data;
750 AVFrame *frame = data;
753 if (avctx->extradata_size && !ctx->extradata_sent) {
755 av_init_packet(&pkt);
756 pkt.data = avctx->extradata;
757 pkt.size = avctx->extradata_size;
758 ctx->extradata_sent = 1;
759 if ((ret = ffmmal_add_packet(avctx, &pkt, 1)) < 0)
763 if ((ret = ffmmal_add_packet(avctx, avpkt, 0)) < 0)
766 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
769 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
772 if ((ret = ffmmal_read_frame(avctx, frame, got_frame)) < 0)
775 // ffmmal_read_frame() can block for a while. Since the decoder is
776 // asynchronous, it's a good idea to fill the ports again.
778 if ((ret = ffmmal_fill_output_port(avctx)) < 0)
781 if ((ret = ffmmal_fill_input_port(avctx)) < 0)
787 AVHWAccel ff_h264_mmal_hwaccel = {
789 .type = AVMEDIA_TYPE_VIDEO,
790 .id = AV_CODEC_ID_H264,
791 .pix_fmt = AV_PIX_FMT_MMAL,
794 AVHWAccel ff_mpeg2_mmal_hwaccel = {
795 .name = "mpeg2_mmal",
796 .type = AVMEDIA_TYPE_VIDEO,
797 .id = AV_CODEC_ID_MPEG2VIDEO,
798 .pix_fmt = AV_PIX_FMT_MMAL,
801 AVHWAccel ff_mpeg4_mmal_hwaccel = {
802 .name = "mpeg4_mmal",
803 .type = AVMEDIA_TYPE_VIDEO,
804 .id = AV_CODEC_ID_MPEG4,
805 .pix_fmt = AV_PIX_FMT_MMAL,
808 AVHWAccel ff_vc1_mmal_hwaccel = {
810 .type = AVMEDIA_TYPE_VIDEO,
811 .id = AV_CODEC_ID_VC1,
812 .pix_fmt = AV_PIX_FMT_MMAL,
815 static const AVOption options[]={
816 {"extra_buffers", "extra buffers", offsetof(MMALDecodeContext, extra_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
817 {"extra_decoder_buffers", "extra MMAL internal buffered frames", offsetof(MMALDecodeContext, extra_decoder_buffers), AV_OPT_TYPE_INT, {.i64 = 10}, 0, 256, 0},
821 #define FFMMAL_DEC_CLASS(NAME) \
822 static const AVClass ffmmal_##NAME##_dec_class = { \
823 .class_name = "mmal_" #NAME "_dec", \
825 .version = LIBAVUTIL_VERSION_INT, \
828 #define FFMMAL_DEC(NAME, ID) \
829 FFMMAL_DEC_CLASS(NAME) \
830 AVCodec ff_##NAME##_mmal_decoder = { \
831 .name = #NAME "_mmal", \
832 .long_name = NULL_IF_CONFIG_SMALL(#NAME " (mmal)"), \
833 .type = AVMEDIA_TYPE_VIDEO, \
835 .priv_data_size = sizeof(MMALDecodeContext), \
836 .init = ffmmal_init_decoder, \
837 .close = ffmmal_close_decoder, \
838 .decode = ffmmal_decode, \
839 .flush = ffmmal_flush, \
840 .priv_class = &ffmmal_##NAME##_dec_class, \
841 .capabilities = AV_CODEC_CAP_DELAY, \
842 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS, \
843 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MMAL, \
844 AV_PIX_FMT_YUV420P, \
848 FFMMAL_DEC(h264, AV_CODEC_ID_H264)
849 FFMMAL_DEC(mpeg2, AV_CODEC_ID_MPEG2VIDEO)
850 FFMMAL_DEC(mpeg4, AV_CODEC_ID_MPEG4)
851 FFMMAL_DEC(vc1, AV_CODEC_ID_VC1)