/**
* Called via glGetBufferSubDataARB().
*/
static void
intel_bufferobj_get_subdata(GLcontext * ctx,
GLenum target,
GLintptrARB offset,
GLsizeiptrARB size,
GLvoid * data, struct gl_buffer_object *obj)
{
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
assert(intel_obj);
if (intel_obj->sys_buffer)
memcpy(data, (char *)intel_obj->sys_buffer + offset, size);
else
dri_bo_get_subdata(intel_obj->buffer, offset, size, data);
}
/* XXX: slice_data_bit_offset does not account for EPB */
unsigned int
avc_get_first_mb_bit_offset_with_epb(
dri_bo *slice_data_bo,
VASliceParameterBufferH264 *slice_param,
unsigned int mode_flag
)
{
unsigned int in_slice_data_bit_offset = slice_param->slice_data_bit_offset;
unsigned int out_slice_data_bit_offset;
unsigned int i, j, n, buf_size, data_size, header_size;
uint8_t *buf;
int ret;
header_size = slice_param->slice_data_bit_offset / 8;
data_size = slice_param->slice_data_size - slice_param->slice_data_offset;
buf_size = (header_size * 3 + 1) / 2; // Max possible header size (x1.5)
if (buf_size > data_size)
buf_size = data_size;
buf = alloca(buf_size);
ret = dri_bo_get_subdata(
slice_data_bo, slice_param->slice_data_offset,
buf_size, buf
);
assert(ret == 0);
for (i = 2, j = 2, n = 0; i < buf_size && j < header_size; i++, j++) {
if (buf[i] == 0x03 && buf[i - 1] == 0x00 && buf[i - 2] == 0x00)
i += 2, j++, n++;
}
out_slice_data_bit_offset = in_slice_data_bit_offset + n * 8;
if (mode_flag == ENTROPY_CABAC)
out_slice_data_bit_offset = ALIGN(out_slice_data_bit_offset, 0x8);
return out_slice_data_bit_offset;
}