gboolean gst_imx_vpu_encoder_load()
{
gboolean ret;
g_mutex_lock(&load_mutex);
imx_vpu_setup_heap_allocator_functions();
ret = (imx_vpu_enc_load() == IMX_VPU_ENC_RETURN_CODE_OK);
g_mutex_unlock(&load_mutex);
return ret;
}
ImxVpuEncReturnCodes imx_vpu_jpeg_enc_open(ImxVpuJPEGEncoder **jpeg_encoder, ImxVpuDMABufferAllocator *dma_buffer_allocator)
{
ImxVpuEncReturnCodes ret = IMX_VPU_ENC_RETURN_CODE_OK;
ImxVpuJPEGEncoder *jpegenc = NULL;
assert(jpeg_encoder != NULL);
if ((ret = imx_vpu_enc_load()) != IMX_VPU_ENC_RETURN_CODE_OK)
goto error;
jpegenc = IMX_VPU_ALLOC(sizeof(ImxVpuJPEGEncoder));
if (jpegenc == NULL)
{
IMX_VPU_ERROR("allocating memory for JPEG encoder object failed");
ret = IMX_VPU_ENC_RETURN_CODE_ERROR;
goto error;
}
memset(jpegenc, 0, sizeof(ImxVpuJPEGEncoder));
jpegenc->dma_buffer_allocator = (dma_buffer_allocator != NULL) ? dma_buffer_allocator : imx_vpu_enc_get_default_allocator();
imx_vpu_enc_get_bitstream_buffer_info(&(jpegenc->bitstream_buffer_size), &(jpegenc->bitstream_buffer_alignment));
jpegenc->bitstream_buffer = imx_vpu_dma_buffer_allocate(jpegenc->dma_buffer_allocator, jpegenc->bitstream_buffer_size, jpegenc->bitstream_buffer_alignment, 0);
if (jpegenc->bitstream_buffer == NULL)
{
IMX_VPU_ERROR("could not allocate DMA buffer for bitstream buffer with %u bytes and alignment %u", jpegenc->bitstream_buffer_size, jpegenc->bitstream_buffer_alignment);
ret = IMX_VPU_ENC_RETURN_CODE_ERROR;
goto error;
}
/* imx_vpu_enc_open() is called later on demand during encoding, to accomodate
* for potentially changing parameters like width, height, quality factor */
*jpeg_encoder = jpegenc;
return IMX_VPU_ENC_RETURN_CODE_OK;
error:
if ((jpegenc != NULL) && (jpegenc->bitstream_buffer != NULL))
imx_vpu_dma_buffer_deallocate(jpegenc->bitstream_buffer);
return ret;
}
Context* init(FILE *input_file, FILE *output_file)
{
Context *ctx;
ImxVpuEncOpenParams open_params;
unsigned int i;
ctx = calloc(1, sizeof(Context));
ctx->fin = input_file;
ctx->fout = output_file;
/* Set the open params. Use the default values (note that memset must still
* be called to ensure all values are set to 0 initially; the
* imx_vpu_enc_set_default_open_params() function does not do this!).
* Then, set a bitrate of 0 kbps, which tells the VPU to use constant quality
* mode instead (controlled by the quant_param field in ImxVpuEncParams).
* Frame width & height are also necessary, as are the frame rate numerator
* and denominator. */
memset(&open_params, 0, sizeof(open_params));
imx_vpu_enc_set_default_open_params(IMX_VPU_CODEC_FORMAT_H264, &open_params);
open_params.bitrate = 0;
open_params.frame_width = FRAME_WIDTH;
open_params.frame_height = FRAME_HEIGHT;
open_params.frame_rate_numerator = FPS_N;
open_params.frame_rate_denominator = FPS_D;
/* Load the VPU firmware */
imx_vpu_enc_load();
/* Retrieve information about the required bitstream buffer and allocate one based on this */
imx_vpu_enc_get_bitstream_buffer_info(&(ctx->bitstream_buffer_size), &(ctx->bitstream_buffer_alignment));
ctx->bitstream_buffer = imx_vpu_dma_buffer_allocate(
imx_vpu_enc_get_default_allocator(),
ctx->bitstream_buffer_size,
ctx->bitstream_buffer_alignment,
0
);
/* Open an encoder instance, using the previously allocated bitstream buffer */
imx_vpu_enc_open(&(ctx->vpuenc), &open_params, ctx->bitstream_buffer);
/* Retrieve the initial information to allocate framebuffers for the
* encoding process (unlike with decoding, these framebuffers are used
* only internally by the encoder as temporary storage; encoded data
* doesn't go in there, nor do raw input frames) */
imx_vpu_enc_get_initial_info(ctx->vpuenc, &(ctx->initial_info));
ctx->num_framebuffers = ctx->initial_info.min_num_required_framebuffers;
fprintf(stderr, "num framebuffers: %u\n", ctx->num_framebuffers);
/* Using the initial information, calculate appropriate framebuffer sizes */
imx_vpu_calc_framebuffer_sizes(COLOR_FORMAT, FRAME_WIDTH, FRAME_HEIGHT, ctx->initial_info.framebuffer_alignment, 0, 0, &(ctx->calculated_sizes));
fprintf(
stderr,
"calculated sizes: frame width&height: %dx%d Y stride: %u CbCr stride: %u Y size: %u CbCr size: %u MvCol size: %u total size: %u\n",
ctx->calculated_sizes.aligned_frame_width, ctx->calculated_sizes.aligned_frame_height,
ctx->calculated_sizes.y_stride, ctx->calculated_sizes.cbcr_stride,
ctx->calculated_sizes.y_size, ctx->calculated_sizes.cbcr_size, ctx->calculated_sizes.mvcol_size,
ctx->calculated_sizes.total_size
);
/* Allocate memory blocks for the framebuffer and DMA buffer structures,
* and allocate the DMA buffers themselves */
ctx->framebuffers = malloc(sizeof(ImxVpuFramebuffer) * ctx->num_framebuffers);
ctx->fb_dmabuffers = malloc(sizeof(ImxVpuDMABuffer*) * ctx->num_framebuffers);
for (i = 0; i < ctx->num_framebuffers; ++i)
{
/* Allocate a DMA buffer for each framebuffer. It is possible to specify alternate allocators;
* all that is required is that the allocator provides physically contiguous memory
* (necessary for DMA transfers) and respecs the alignment value. */
ctx->fb_dmabuffers[i] = imx_vpu_dma_buffer_allocate(imx_vpu_dec_get_default_allocator(), ctx->calculated_sizes.total_size, ctx->initial_info.framebuffer_alignment, 0);
imx_vpu_fill_framebuffer_params(&(ctx->framebuffers[i]), &(ctx->calculated_sizes), ctx->fb_dmabuffers[i], 0);
}
/* allocate DMA buffers for the raw input frames. Since the encoder can only read
* raw input pixels from a DMA memory region, it is necessary to allocate one,
* and later copy the pixels into it. In production, it is generally a better
* idea to make sure that the raw input frames are already placed in DMA memory
* (either allocated by imx_vpu_dma_buffer_allocate() or by some other means of
* getting DMA / physically contiguous memory with known physical addresses). */
ctx->input_fb_dmabuffer = imx_vpu_dma_buffer_allocate(imx_vpu_dec_get_default_allocator(), ctx->calculated_sizes.total_size, ctx->initial_info.framebuffer_alignment, 0);
imx_vpu_fill_framebuffer_params(&(ctx->input_framebuffer), &(ctx->calculated_sizes), ctx->input_fb_dmabuffer, 0);
/* Actual registration is done here. From this moment on, the VPU knows which buffers to use for
* storing temporary frames into. This call must not be done again until encoding is shut down. */
imx_vpu_enc_register_framebuffers(ctx->vpuenc, ctx->framebuffers, ctx->num_framebuffers);
return ctx;
}
Context* init(FILE *input_file, FILE *output_file)
{
Context *ctx;
ImxVpuEncOpenParams open_params;
unsigned int i;
ctx = calloc(1, sizeof(Context));
ctx->fin = input_file;
ctx->fout = output_file;
imx_vpu_enc_set_default_open_params(IMX_VPU_CODEC_FORMAT_H264, &open_params);
open_params.frame_width = FRAME_WIDTH;
open_params.frame_height = FRAME_HEIGHT;
open_params.framerate = FPS;
imx_vpu_enc_load();
imx_vpu_enc_get_bitstream_buffer_info(&(ctx->bitstream_buffer_size), &(ctx->bitstream_buffer_alignment));
ctx->bitstream_buffer = imx_vpu_dma_buffer_allocate(imx_vpu_enc_get_default_allocator(), ctx->bitstream_buffer_size, ctx->bitstream_buffer_alignment, 0);
imx_vpu_enc_open(&(ctx->vpuenc), &open_params, ctx->bitstream_buffer);
imx_vpu_enc_get_initial_info(ctx->vpuenc, &(ctx->initial_info));
ctx->num_framebuffers = ctx->initial_info.min_num_required_framebuffers;
fprintf(stderr, "num framebuffers: %u\n", ctx->num_framebuffers);
imx_vpu_calc_framebuffer_sizes(COLOR_FORMAT, FRAME_WIDTH, FRAME_HEIGHT, ctx->initial_info.framebuffer_alignment, 0, &(ctx->calculated_sizes));
fprintf(
stderr,
"calculated sizes: frame width&height: %dx%d Y stride: %u CbCr stride: %u Y size: %u CbCr size: %u MvCol size: %u total size: %u\n",
ctx->calculated_sizes.aligned_frame_width, ctx->calculated_sizes.aligned_frame_height,
ctx->calculated_sizes.y_stride, ctx->calculated_sizes.cbcr_stride,
ctx->calculated_sizes.y_size, ctx->calculated_sizes.cbcr_size, ctx->calculated_sizes.mvcol_size,
ctx->calculated_sizes.total_size
);
ctx->framebuffers = malloc(sizeof(ImxVpuFramebuffer) * ctx->num_framebuffers);
ctx->fb_dmabuffers = malloc(sizeof(ImxVpuDMABuffer*) * ctx->num_framebuffers);
for (i = 0; i < ctx->num_framebuffers; ++i)
{
/* Allocate a DMA buffer for each framebuffer. It is possible to specify alternate allocators;
* all that is required is that the allocator provides physically contiguous memory
* (necessary for DMA transfers) and respecs the alignment value. */
ctx->fb_dmabuffers[i] = imx_vpu_dma_buffer_allocate(imx_vpu_dec_get_default_allocator(), ctx->calculated_sizes.total_size, ctx->initial_info.framebuffer_alignment, 0);
imx_vpu_fill_framebuffer_params(&(ctx->framebuffers[i]), &(ctx->calculated_sizes), ctx->fb_dmabuffers[i], 0);
}
/* allocate DMA buffers for the input and output buffers. Use total_size as size for both;
* the output buffer will most likely contain data later that is much smaller than the input,
* but just to be on the safe side, make sure that even an uncompressed frame could fit */
ctx->input_fb_dmabuffer = imx_vpu_dma_buffer_allocate(imx_vpu_dec_get_default_allocator(), ctx->calculated_sizes.total_size, ctx->initial_info.framebuffer_alignment, 0);
imx_vpu_fill_framebuffer_params(&(ctx->input_framebuffer), &(ctx->calculated_sizes), ctx->input_fb_dmabuffer, 0);
ctx->output_dmabuffer = imx_vpu_dma_buffer_allocate(imx_vpu_dec_get_default_allocator(), ctx->calculated_sizes.total_size, ctx->initial_info.framebuffer_alignment, 0);
/* Actual registration is done here. From this moment on, the VPU knows which buffers to use for
* storing temporary pictures into. This call must not be done again until encoding is shut down. */
imx_vpu_enc_register_framebuffers(ctx->vpuenc, ctx->framebuffers, ctx->num_framebuffers);
return ctx;
}
