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mmaloutput.c
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mmaloutput.c
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/*
* mmaloutput.c
*
* Created on: 13 Apr 2014
* Author: ntuckett
*/
#include "bcm_host.h"
#include "interface/vcos/vcos.h"
#include "interface/mmal/mmal.h"
#include "interface/mmal/mmal_buffer.h"
#include "interface/mmal/mmal_port.h"
#include "interface/mmal/util/mmal_util.h"
#include "interface/mmal/util/mmal_util_params.h"
#include "interface/mmal/util/mmal_default_components.h"
#include "interface/mmal/util/mmal_connection.h"
#include "mmaloutput.h"
#include "motion.h"
static void buffer_callback(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
{
mmal_output* output = (mmal_output*) port->userdata;
MOTION_LOG(DBG, TYPE_VIDEO, NO_ERRNO, "%s: Output %s: buffer_callback - entry", output->name);
mmal_queue_put(output->buffer_queue, buffer);
MOTION_LOG(DBG, TYPE_VIDEO, NO_ERRNO, "%s: Output %s: buffer_callback - exit", output->name);
}
int mmal_output_init(const char* name, mmal_output* output, struct MMAL_PORT_T* port, int flags)
{
memset(output, 0, sizeof(mmal_output));
strncpy(output->name, name, MMAL_OUTPUT_NAME_LEN);
output->name[MMAL_OUTPUT_NAME_LEN] = 0;
output->flags = flags;
output->buffer_pool = mmal_pool_create(port->buffer_num, port->buffer_size);
if (output->buffer_pool == NULL) {
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: MMAL Output %s: buffer pool creation failed", output->name);
mmal_output_deinit(output);
return -1;
}
output->buffer_queue = mmal_queue_create();
if (output->buffer_queue == NULL ) {
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: MMAL Output %s: buffer queue creation failed", output->name);
mmal_output_deinit(output);
return -1;
}
output->port = port;
return 0;
}
int mmal_output_enable(mmal_output* output)
{
output->port->userdata = (struct MMAL_PORT_USERDATA_T*) output;
MMAL_STATUS_T status = mmal_port_enable(output->port, buffer_callback);
if (status) {
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: Unable to enable output %s port : error %d", output->name, status);
return -1;
}
return 0;
}
int mmal_output_send_buffers_to_port(mmal_output* output)
{
int num = mmal_queue_length(output->buffer_pool->queue);
for (int i = 0; i < num; i++) {
MMAL_BUFFER_HEADER_T *buffer = mmal_queue_get(output->buffer_pool->queue);
if (!buffer) {
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: Output %s: Unable to get a required buffer %d from pool queue", output->name, i);
return -1;
}
if (mmal_port_send_buffer(output->port, buffer) != MMAL_SUCCESS) {
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: Output %s: Unable to send a buffer to port (%d)", output->name, i);
return -1;
}
}
return 0;
}
size_t mmal_output_process_buffer(mmal_output* output, void* dest, size_t size)
{
int buffer_complete = 0;
size_t buffer_progress = 0;
char* buffer_dest = (char*)dest;
do {
MMAL_BUFFER_HEADER_T *buffer = mmal_queue_wait(output->buffer_queue);
MOTION_LOG(DBG, TYPE_VIDEO, NO_ERRNO, "%s: Output %s - got buffer", output->name);
MOTION_LOG(DBG, TYPE_VIDEO, NO_ERRNO, "%s: cmd %d flags %08x size %d/%d at %08x",
buffer->cmd, buffer->flags, buffer->length, buffer->alloc_size, buffer->data);
if (output->flags & MMAL_OUTPUT_INCREMENTAL) {
if (buffer->cmd == 0) {
if (size >= buffer_progress + buffer->length) {
mmal_buffer_header_mem_lock(buffer);
memcpy(buffer_dest + buffer_progress, buffer->data, buffer->length);
mmal_buffer_header_mem_unlock(buffer);
buffer_progress += buffer->length;
buffer_complete = buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END;
MOTION_LOG(DBG, TYPE_VIDEO, NO_ERRNO, "%s: buffer progress %d/%d", buffer_progress, size);
}
else {
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: Output %s - buffer overflow", output->name);
buffer_complete = 1;
buffer_progress = 0;
}
}
} else if (buffer->cmd == 0 && (buffer->flags & MMAL_BUFFER_HEADER_FLAG_FRAME_END)) {
if (dest != NULL) {
if (buffer->length == size) {
mmal_buffer_header_mem_lock(buffer);
memcpy(dest, buffer->data, size);
mmal_buffer_header_mem_unlock(buffer);
buffer_progress = buffer->length;
}
else {
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: Output %s - buffer size %d does not match destination %d", output->name, buffer->length, size);
}
}
buffer_complete = 1;
}
mmal_buffer_header_release(buffer);
if (output->port->is_enabled) {
MMAL_STATUS_T status;
MMAL_BUFFER_HEADER_T *new_buffer = mmal_queue_get(output->buffer_pool->queue);
if (new_buffer) {
status = mmal_port_send_buffer(output->port, new_buffer);
MOTION_LOG(DBG, TYPE_VIDEO, NO_ERRNO, "%s: Output %s - new buffer returned", output->name);
}
if (!new_buffer || status != MMAL_SUCCESS)
MOTION_LOG(ERR, TYPE_VIDEO, NO_ERRNO, "%s: Unable to return a buffer to output %s port", output->name);
}
} while (!buffer_complete && output->port->is_enabled);
return buffer_progress;
}
void mmal_output_deinit(mmal_output* output)
{
if (output->buffer_queue != NULL) {
mmal_queue_destroy(output->buffer_queue);
}
if (output->buffer_pool != NULL) {
mmal_pool_destroy(output->buffer_pool);
}
if (output->port != NULL && output->port->is_enabled) {
mmal_port_disable(output->port);
}
memset(output, 0, sizeof(mmal_output));
}