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196 lines
7.1 KiB
196 lines
7.1 KiB
/* |
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Copyright (c) 2012, Broadcom Europe Ltd |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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* Neither the name of the copyright holder nor the |
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names of its contributors may be used to endorse or promote products |
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derived from this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY |
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "bcm_host.h" |
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#include "mmal.h" |
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#include "util/mmal_connection.h" |
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#include "util/mmal_default_components.h" |
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#include "util/mmal_util_params.h" |
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#include "interface/vcos/vcos.h" |
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#include <stdio.h> |
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#define CHECK_STATUS(status, msg) if (status != MMAL_SUCCESS) { fprintf(stderr, msg"\n"); goto error; } |
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/** Context for our application */ |
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static struct CONTEXT_T { |
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VCOS_SEMAPHORE_T semaphore; |
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MMAL_STATUS_T status; |
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MMAL_BOOL_T eos; |
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} context; |
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/** Callback from a control port. Error and EOS events stop playback. */ |
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static void control_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer) |
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{ |
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struct CONTEXT_T *ctx = (struct CONTEXT_T *)port->userdata; |
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if (buffer->cmd == MMAL_EVENT_ERROR) |
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ctx->status = *(MMAL_STATUS_T *)buffer->data; |
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else if (buffer->cmd == MMAL_EVENT_EOS) |
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ctx->eos = MMAL_TRUE; |
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mmal_buffer_header_release(buffer); |
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/* The processing is done in our main thread */ |
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vcos_semaphore_post(&ctx->semaphore); |
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} |
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/** Callback from the connection. Buffer is available. */ |
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static void connection_callback(MMAL_CONNECTION_T *connection) |
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{ |
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struct CONTEXT_T *ctx = (struct CONTEXT_T *)connection->user_data; |
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/* The processing is done in our main thread */ |
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vcos_semaphore_post(&ctx->semaphore); |
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} |
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int main(int argc, char **argv) |
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{ |
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MMAL_STATUS_T status; |
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MMAL_COMPONENT_T *reader = 0, *decoder = 0, *renderer = 0; |
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MMAL_CONNECTION_T *connection[2] = {0}; |
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unsigned int i, count, connection_num = vcos_countof(connection); |
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if (argc < 2) |
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{ |
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fprintf(stderr, "invalid arguments\n"); |
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return -1; |
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} |
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bcm_host_init(); |
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vcos_semaphore_create(&context.semaphore, "example", 1); |
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/* Create the components */ |
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status = mmal_component_create(MMAL_COMPONENT_DEFAULT_CONTAINER_READER, &reader); |
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CHECK_STATUS(status, "failed to create reader"); |
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reader->control->userdata = (void *)&context; |
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status = mmal_port_enable(reader->control, control_callback); |
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CHECK_STATUS(status, "failed to enable control port"); |
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status = mmal_component_enable(reader); |
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CHECK_STATUS(status, "failed to enable component"); |
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status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_DECODER, &decoder); |
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CHECK_STATUS(status, "failed to create decoder"); |
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decoder->control->userdata = (void *)&context; |
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status = mmal_port_enable(decoder->control, control_callback); |
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CHECK_STATUS(status, "failed to enable control port"); |
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status = mmal_component_enable(decoder); |
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CHECK_STATUS(status, "failed to enable component"); |
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status = mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_RENDERER, &renderer); |
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CHECK_STATUS(status, "failed to create renderer"); |
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renderer->control->userdata = (void *)&context; |
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status = mmal_port_enable(renderer->control, control_callback); |
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CHECK_STATUS(status, "failed to enable control port"); |
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status = mmal_component_enable(renderer); |
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CHECK_STATUS(status, "failed to enable component"); |
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/* Configure the reader using the given URI */ |
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status = mmal_util_port_set_uri(reader->control, argv[1]); |
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CHECK_STATUS(status, "failed to set uri"); |
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/* Create the connections between the components */ |
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status = mmal_connection_create(&connection[0], reader->output[0], decoder->input[0], 0); |
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CHECK_STATUS(status, "failed to create connection between reader / decoder"); |
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connection[0]->user_data = &context; |
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connection[0]->callback = connection_callback; |
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status = mmal_connection_create(&connection[1], decoder->output[0], renderer->input[0], 0); |
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CHECK_STATUS(status, "failed to create connection between decoder / renderer"); |
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connection[1]->user_data = &context; |
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connection[1]->callback = connection_callback; |
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/* Enable all our connections */ |
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for (i = connection_num; i; i--) |
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{ |
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status = mmal_connection_enable(connection[i-1]); |
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CHECK_STATUS(status, "failed to enable connection"); |
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} |
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/* Start playback */ |
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fprintf(stderr, "start playback\n"); |
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/* This is the main processing loop */ |
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for (count = 0; count < 500; count++) |
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{ |
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MMAL_BUFFER_HEADER_T *buffer; |
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vcos_semaphore_wait(&context.semaphore); |
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/* Check for errors */ |
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status = context.status; |
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CHECK_STATUS(status, "error during playback"); |
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/* Check for end of stream */ |
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if (context.eos) |
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break; |
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/* Handle buffers for all our connections */ |
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for (i = 0; i < connection_num; i++) |
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{ |
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if (connection[i]->flags & MMAL_CONNECTION_FLAG_TUNNELLING) |
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continue; /* Nothing else to do in tunnelling mode */ |
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/* Send empty buffers to the output port of the connection */ |
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while ((buffer = mmal_queue_get(connection[i]->pool->queue)) != NULL) |
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{ |
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status = mmal_port_send_buffer(connection[i]->out, buffer); |
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CHECK_STATUS(status, "failed to send buffer"); |
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} |
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/* Send any queued buffer to the next component */ |
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while ((buffer = mmal_queue_get(connection[i]->queue)) != NULL) |
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{ |
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status = mmal_port_send_buffer(connection[i]->in, buffer); |
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CHECK_STATUS(status, "failed to send buffer"); |
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} |
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} |
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} |
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/* Stop everything */ |
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fprintf(stderr, "stop playback\n"); |
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for (i = 0; i < connection_num; i++) |
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{ |
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mmal_connection_disable(connection[i]); |
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} |
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error: |
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/* Cleanup everything */ |
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for (i = 0; i < connection_num; i++) |
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{ |
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if (connection[i]) |
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mmal_connection_destroy(connection[i]); |
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} |
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if (reader) |
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mmal_component_destroy(reader); |
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if (decoder) |
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mmal_component_destroy(decoder); |
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if (renderer) |
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mmal_component_destroy(renderer); |
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vcos_semaphore_delete(&context.semaphore); |
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return status == MMAL_SUCCESS ? 0 : -1; |
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}
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