void RecordVideo::decompress_buffer(VFrame *frame)
{
if( !strncmp(record->default_asset->vcodec, QUICKTIME_MJPA, 4) &&
record->vdevice->is_compressed(0, 1)) {
unsigned char *data = frame->get_data();
int64_t size = frame->get_compressed_size();
//int64_t allocation = frame->get_compressed_allocated();
if( data ) {
int64_t field2_offset = mjpeg_get_field2(data, size);
frame->set_compressed_size(size);
frame->set_field2_offset(field2_offset);
}
}
}
void RecordVideo::read_buffer()
{
grab_result = record->vdevice->read_buffer(capture_frame);
// Get field offset for monitor
if(!strncmp(record->default_asset->vcodec, QUICKTIME_MJPA, 4) &&
record->vdevice->is_compressed(0, 1))
{
unsigned char *data = capture_frame->get_data();
int64_t size = capture_frame->get_compressed_size();
int64_t allocation = capture_frame->get_compressed_allocated();
if(data)
{
int64_t field2_offset = mjpeg_get_field2(data, size);
capture_frame->set_compressed_size(size);
capture_frame->set_field2_offset(field2_offset);
}
}
}
static int decode(quicktime_t *file,
unsigned char **row_pointers,
int track)
{
quicktime_video_map_t *vtrack = &(file->vtracks[track]);
initialize(vtrack);
quicktime_jpeg_codec_t *codec = ((quicktime_codec_t*)vtrack->codec)->priv;
quicktime_trak_t *trak = vtrack->track;
mjpeg_t *mjpeg = codec->mjpeg;
long size, field2_offset = 0;
int track_height = trak->tkhd.track_height;
int track_width = trak->tkhd.track_width;
int result = 0;
int field_dominance = trak->mdia.minf.stbl.stsd.table[0].field_dominance;
mjpeg_set_cpus(codec->mjpeg, file->cpus);
if(file->row_span)
mjpeg_set_rowspan(codec->mjpeg, file->row_span);
else
mjpeg_set_rowspan(codec->mjpeg, 0);
quicktime_set_video_position(file, vtrack->current_position, track);
size = quicktime_frame_size(file, vtrack->current_position, track);
codec->buffer_size = size;
if(size > codec->buffer_allocated)
{
codec->buffer_allocated = size;
codec->buffer = realloc(codec->buffer, codec->buffer_allocated);
}
result = !quicktime_read_data(file, (char*)codec->buffer, size);
/*
* printf("decode 1 %02x %02x %02x %02x %02x %02x %02x %02x\n",
* codec->buffer[0],
* codec->buffer[1],
* codec->buffer[2],
* codec->buffer[3],
* codec->buffer[4],
* codec->buffer[5],
* codec->buffer[6],
* codec->buffer[7]
* );
*/
if(!result)
{
if(mjpeg_get_fields(mjpeg) == 2)
{
if(file->use_avi)
{
field2_offset = mjpeg_get_avi_field2(codec->buffer,
size,
&field_dominance);
}
else
{
field2_offset = mjpeg_get_quicktime_field2(codec->buffer,
size);
// Sanity check
if(!field2_offset)
{
printf("decode: FYI field2_offset=0\n");
field2_offset = mjpeg_get_field2(codec->buffer, size);
}
}
}
else
field2_offset = 0;
//printf("decode 2 %d\n", field2_offset);
/*
* printf("decode result=%d field1=%llx field2=%llx size=%d %02x %02x %02x %02x\n",
* result,
* quicktime_position(file) - size,
* quicktime_position(file) - size + field2_offset,
* size,
* codec->buffer[0],
* codec->buffer[1],
* codec->buffer[field2_offset + 0],
* codec->buffer[field2_offset + 1]);
*/
if(file->in_x == 0 &&
file->in_y == 0 &&
file->in_w == track_width &&
file->in_h == track_height &&
file->out_w == track_width &&
file->out_h == track_height)
{
mjpeg_decompress(codec->mjpeg,
codec->buffer,
size,
field2_offset,
row_pointers,
row_pointers[0],
row_pointers[1],
row_pointers[2],
file->color_model,
file->cpus);
}
else
{
int i;
unsigned char **temp_rows;
int temp_cmodel = BC_YUV888;
int temp_rowsize = cmodel_calculate_pixelsize(temp_cmodel) * track_width;
if(!codec->temp_video)
codec->temp_video = malloc(temp_rowsize * track_height);
temp_rows = malloc(sizeof(unsigned char*) * track_height);
for(i = 0; i < track_height; i++)
temp_rows[i] = codec->temp_video + i * temp_rowsize;
//printf("decode 10\n");
mjpeg_decompress(codec->mjpeg,
codec->buffer,
size,
field2_offset,
temp_rows,
temp_rows[0],
temp_rows[1],
temp_rows[2],
temp_cmodel,
file->cpus);
cmodel_transfer(row_pointers,
temp_rows,
row_pointers[0],
row_pointers[1],
row_pointers[2],
temp_rows[0],
temp_rows[1],
temp_rows[2],
file->in_x,
file->in_y,
file->in_w,
file->in_h,
0,
0,
file->out_w,
file->out_h,
temp_cmodel,
file->color_model,
0,
track_width,
file->out_w);
//printf("decode 30\n");
free(temp_rows);
//printf("decode 40\n");
}
}
//printf("decode 2 %d\n", result);
return result;
}
