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/*! @file vc5_decoder.c
*
* @brief Implementation of the top level vc5 decoder API.
*
* (C) Copyright 2018 GoPro Inc (http://gopro.com/).
*
* Licensed under either:
* - Apache License, Version 2.0, http://www.apache.org/licenses/LICENSE-2.0
* - MIT license, http://opensource.org/licenses/MIT
* at your option.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "headers.h"
void vc5_decoder_parameters_set_default(vc5_decoder_parameters* decoding_parameters)
{
decoding_parameters->enabled_parts = VC5_ENABLED_PARTS;
decoding_parameters->pixel_format = VC5_DECODER_PIXEL_FORMAT_DEFAULT;
decoding_parameters->rgb_resolution = VC5_DECODER_RGB_RESOLUTION_DEFAULT;
decoding_parameters->rgb_bits = 8;
gpr_rgb_gain_set_defaults(&decoding_parameters->rgb_gain);
}
CODEC_ERROR vc5_decoder_process(const vc5_decoder_parameters* decoding_parameters, /* vc5 decoding parameters */
const gpr_buffer* vc5_buffer, /* vc5 input buffer. */
gpr_buffer* raw_buffer, /* raw output buffer. */
gpr_rgb_buffer* rgb_buffer) /* rgb output buffer */
{
CODEC_ERROR error = CODEC_ERROR_OKAY;
IMAGE output_image;
// Clear the members of the image data structure
InitImage(&output_image);
STREAM input;
DECODER_PARAMETERS parameters;
// Initialize the parameters passed to the decoder
InitDecoderParameters(¶meters);
parameters.enabled_parts = decoding_parameters->enabled_parts;
parameters.rgb_resolution = decoding_parameters->rgb_resolution;
parameters.rgb_bits = decoding_parameters->rgb_bits;
parameters.rgb_gain = decoding_parameters->rgb_gain;
if( rgb_buffer == NULL )
{
parameters.rgb_resolution = GPR_RGB_RESOLUTION_NONE;
}
parameters.allocator.Alloc = decoding_parameters->mem_alloc;
parameters.allocator.Free = decoding_parameters->mem_free;
switch( decoding_parameters->pixel_format )
{
case VC5_DECODER_PIXEL_FORMAT_RGGB_12:
parameters.output.format = PIXEL_FORMAT_RAW_RGGB_12;
break;
case VC5_DECODER_PIXEL_FORMAT_RGGB_14:
parameters.output.format = PIXEL_FORMAT_RAW_RGGB_14;
break;
case VC5_DECODER_PIXEL_FORMAT_GBRG_12:
parameters.output.format = PIXEL_FORMAT_RAW_GBRG_12;
break;
case VC5_DECODER_PIXEL_FORMAT_GBRG_14:
parameters.output.format = PIXEL_FORMAT_RAW_GBRG_14;
break;
default:
assert(0);
}
// Check that the enabled parts are correct
error = CheckEnabledParts(¶meters.enabled_parts);
if (error != CODEC_ERROR_OKAY) {
return CODEC_ERROR_ENABLED_PARTS;
}
error = OpenStreamBuffer(&input, vc5_buffer->buffer, vc5_buffer->size );
if (error != CODEC_ERROR_OKAY) {
fprintf(stderr, "Could not open input vc5 stream\n" );
return error;
}
RGB_IMAGE rgb_image;
InitRGBImage(&rgb_image);
error = DecodeImage(&input, &output_image, &rgb_image, ¶meters);
if (error != CODEC_ERROR_OKAY) {
fprintf(stderr, "Could not decode input vc5 bitstream. Error number %d\n", error );
return error;
}
if( parameters.rgb_resolution != GPR_RGB_RESOLUTION_NONE )
{
assert( rgb_buffer);
rgb_buffer->buffer = rgb_image.buffer;
rgb_buffer->size = rgb_image.size;
rgb_buffer->width = rgb_image.width;
rgb_buffer->height = rgb_image.height;
}
if( raw_buffer )
{
assert( output_image.buffer );
assert( output_image.size == output_image.width * output_image.height * sizeof(unsigned short) );
raw_buffer->buffer = output_image.buffer;
raw_buffer->size = output_image.size;
}
else
{
// Nothing should be returned in output_image since we do not want output raw image
assert( output_image.buffer == NULL );
}
return error;
}
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