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jpeg_encoder.cpp
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jpeg_encoder.cpp
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#include "jpeg_encoder.h"
extern "C" {
#include "ilclient.h"
#include <IL/OMX_Core.h>
#include <IL/OMX_Component.h>
#include <bcm_host.h>
}
using namespace jpegEncoder;
// globals
static ILCLIENT_T *client = NULL;
static COMPONENT_T *imageEncode = NULL;
static COMPONENT_T *list[5];
static OMX_HANDLETYPE compHandle = NULL;
// module's definitions
#define ALIGN(x, y) (((x) + ((y) - 1)) & ~((y) - 1))
#ifdef DEBUG_JPEG_ENCODER
static inline void print_def(OMX_PARAM_PORTDEFINITIONTYPE def) {
syslog(LOG_DEBUG,
"Port %lu: %s %lu %s %s %lux%lu %lux%lu @%lu %u",
(long unsigned)def.nPortIndex,
def.eDir == OMX_DirInput ? "in" : "out",
(long unsigned)def.nBufferSize,
def.bEnabled ? "enabled" : "disabled",
def.bPopulated ? "populated" : "not populated.",
(long unsigned)def.format.image.nFrameWidth,
(long unsigned)def.format.image.nFrameHeight,
(long unsigned)def.format.image.nStride,
(long unsigned)def.format.image.nSliceHeight,
(long unsigned)def.format.image.eCompressionFormat,
(unsigned)def.format.image.eColorFormat);
}
static inline void print_state(OMX_HANDLETYPE handle) {
OMX_STATETYPE state;
OMX_ERRORTYPE err;
err = OMX_GetState(handle, &state);
if (err != OMX_ErrorNone) {
syslog(LOG_ERR, "Error on getting state");
return;
}
switch (state) {
case OMX_StateLoaded:
syslog(LOG_DEBUG, "StateLoaded"); break;
case OMX_StateIdle:
syslog(LOG_DEBUG, "StateIdle"); break;
case OMX_StateExecuting:
syslog(LOG_DEBUG, "StateExecuting"); break;
case OMX_StatePause:
syslog(LOG_DEBUG, "StatePause"); break;
case OMX_StateWaitForResources:
syslog(LOG_DEBUG, "StateWait"); break;
case OMX_StateInvalid:
syslog(LOG_DEBUG, "StateInvalid"); break;
default:
syslog(LOG_DEBUG, "State unknown"); break;
}
}
static inline void print_format(OMX_IMAGE_PARAM_PORTFORMATTYPE format) {
syslog(LOG_DEBUG,
"Index: %u; CompressionFormat: %u; ColorFormat: %u",
format.nIndex,
format.eCompressionFormat,
format.eColorFormat);
}
#endif
//
// Public routines
//
bool jpegEncoder::init() {
OMX_ERRORTYPE r;
int iRet;
memset(list, 0, sizeof(list));
// initializes bcm host
bcm_host_init();
// initializes IL and get handle
if ((client = ilclient_init()) == NULL) {
syslog(LOG_ERR, "Could not init IL client.");
return false;
}
// initializes OMX
if (OMX_Init() != OMX_ErrorNone) {
syslog(LOG_ERR, "OMX init failed.");
return false;
}
// creating the image_encode component into GPU
int flags =
(int)ILCLIENT_DISABLE_ALL_PORTS |
(int)ILCLIENT_ENABLE_INPUT_BUFFERS |
(int)ILCLIENT_ENABLE_OUTPUT_BUFFERS;
iRet = ilclient_create_component(client, &imageEncode,
(char *)"image_encode",
(ILCLIENT_CREATE_FLAGS_T)flags);
if (iRet == -1) {
syslog(LOG_ERR, "Could not create image_encode_component.");
return false;
}
list[0] = imageEncode;
compHandle = ilclient_get_handle(imageEncode); // getting handle from videoEncode component
// OMX.broadcom.image_encode
// ref: http://home.nouwen.name/RaspberryPi/documentation/ilcomponents/image_encode.html
// getting information from port 340, input, in order to
// fill it with new options
OMX_PARAM_PORTDEFINITIONTYPE def;
size_t len = sizeof(OMX_PARAM_PORTDEFINITIONTYPE);
memset(&def, 0, len);
def.nSize = len;
def.nVersion.nVersion = OMX_VERSION;
def.nPortIndex = 340;
if (OMX_GetParameter(compHandle, OMX_IndexParamPortDefinition, &def) != OMX_ErrorNone) { // getting OMX_IndexParamPortDefinition from port 340
syslog(LOG_ERR, "Could not get OMX_IndexParamPortDefinition on OMX.broadcom.image_encode:340.");
return false;
}
#ifdef DEBUG_JPEG_ENCODER
print_def(def);
#endif
// setting new attributes to the port 340
def.format.image.nFrameWidth = FRAME_WIDTH;
def.format.image.nFrameHeight = FRAME_HEIGHT;
int width32 = ALIGN(FRAME_WIDTH, 32);
int height16 = ALIGN(FRAME_HEIGHT, 16);
def.format.image.nStride = width32;
def.format.image.nSliceHeight = height16;
def.format.image.eColorFormat = OMX_COLOR_Format32bitARGB8888;
def.format.image.eCompressionFormat = OMX_IMAGE_CodingUnused;
def.nBufferSize = 614400;
r = OMX_SetParameter(compHandle, OMX_IndexParamPortDefinition, &def);
if (r != OMX_ErrorNone) {
syslog(LOG_ERR, "Could not set OMX_IndexParamPortDefinition on OMX.broadcom.image_encode:340.");
return false;
}
#ifdef DEBUG_JPEG_ENCODER
// verify settings of image_encode's input port (340)
if (OMX_GetParameter(compHandle, OMX_IndexParamPortDefinition, &def) != OMX_ErrorNone) {
syslog(LOG_ERR, "Could not get OMX_IndexParamPortDefinition on OMX.broadcom.image_encode:340.");
return false;
}
print_def(def);
#endif
// setting format on image_encode's output port (341)
OMX_IMAGE_PARAM_PORTFORMATTYPE format;
len = sizeof(OMX_IMAGE_PARAM_PORTFORMATTYPE);
memset(&format, 0, len);
format.nSize = len;
format.nVersion.nVersion = OMX_VERSION;
format.nPortIndex = 341;
format.eCompressionFormat = OMX_IMAGE_CodingJPEG;
format.eColorFormat = OMX_COLOR_FormatUnused;
// updating attributes from port 341 (output)
r = OMX_SetParameter(compHandle, OMX_IndexParamImagePortFormat, &format);
if (r != OMX_ErrorNone) {
syslog(LOG_ERR, "Could not set OMX_IndexParamImagePortFormat on OMX.broadcom.image_encode:341.");
return false;
}
#ifdef DEBUG_JPEG_ENCODER
// verify format of image_encode output port
if (OMX_GetParameter(compHandle, OMX_IndexParamImagePortFormat, &format) != OMX_ErrorNone) {
syslog(LOG_ERR, "Could not get OMX_IndexParamImagePortFormat OMX.broadcom.image_encode:341.");
return false;
}
print_format(format);
#endif
// putting the imageEncode in IDLE state
iRet = ilclient_change_component_state(imageEncode, OMX_StateIdle);
if (iRet == -1) {
syslog(LOG_ERR, "Could not change OMX.broadcom.image_encode's state to OMX_StateIdle.");
return false;
}
#ifdef DEBUG_JPEG_ENCODER
print_state(compHandle);
#endif
// enabling port buffers to the port 340
iRet = ilclient_enable_port_buffers(imageEncode, 340, NULL, NULL, NULL);
if (iRet != 0) {
syslog(LOG_ERR, "Could not enable port buffers for OMX.broadcom.image_encode:340.");
return false;
}
// enabling port buffers to the port 341
iRet = ilclient_enable_port_buffers(imageEncode, 341, NULL, NULL, NULL);
if (iRet != 0) {
syslog(LOG_ERR, "Could not enable port buffers for OMX.broadcom.image_encode:341.");
return false;
}
// putting the image_encode in Executing state
iRet = ilclient_change_component_state(imageEncode, OMX_StateExecuting);
if (iRet != 0) {
syslog(LOG_ERR, "Could not put OMX.broadcom.image_encode into OMX_StateExecuting mode.");
return false;
}
#ifdef DEBUG_JPEG_ENCODER
print_state(compHandle);
#endif
return true;
}
bool jpegEncoder::encode(const unsigned char *bufIn, size_t bufLenIn, unsigned char *bufOut, size_t *bufLenOut) {
// getting some buffer from imageEncode on port 340
OMX_BUFFERHEADERTYPE *buf;
buf = ilclient_get_input_buffer(imageEncode, 340, 1);
if (buf == NULL) {
syslog(LOG_ERR, "No buffer available for convert frame in OMX.broadcom.image_encode:340.");
return false;
}
size_t len = min(buf->nAllocLen, bufLenIn);
memcpy(buf->pBuffer, bufIn, len); // copying from bufIn to buf->pBuffer
buf->nFilledLen = len;
OMX_EmptyThisBuffer(compHandle, buf); // freeing used buffer in the port 340
// getting jpeg image chunk back from image_encode
OMX_BUFFERHEADERTYPE *out;
OMX_ERRORTYPE r;
out = ilclient_get_output_buffer(imageEncode, 341, 1);
if (out == NULL) {
syslog(LOG_ERR, "Could not get out JPEG buffer.");
return false;
}
usleep(1 * 1000); // some weird hack goes here: we need to wait some miliseconds (not microseconds) in order to get that fucking crap back
r = OMX_FillThisBuffer(compHandle, out);
if (r != OMX_ErrorNone) {
syslog(LOG_ERR, "Error filling out JPEG buffer.");
return false;
}
// copying jpeg chunk into bufOut
if (out->nFilledLen > 0) {
len = min(*bufLenOut, out->nFilledLen);
*bufLenOut = len;
memcpy(bufOut, out->pBuffer, len);
}
out->nFilledLen = 0;
return true;
}
void jpegEncoder::close() {
if (client) { // closing handle if was opened
ilclient_destroy(client);
}
}