static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
int block_nb, int thread_nb)
{
HapContext *ctx = avctx->priv_data;
AVFrame *frame = arg;
int x = (TEXTURE_BLOCK_W * block_nb) % avctx->coded_width;
int y = TEXTURE_BLOCK_H * (TEXTURE_BLOCK_W * block_nb / avctx->coded_width);
uint8_t *p = frame->data[0] + x * 4 + y * frame->linesize[0];
const uint8_t *d = ctx->tex_data + block_nb * ctx->tex_rat;
ctx->tex_fun(p, frame->linesize[0], d);
return 0;
}
static void compress_texture(AVCodecContext *avctx, const AVFrame *f)
{
HapContext *ctx = avctx->priv_data;
uint8_t *out = ctx->tex_buf;
int i, j;
for (j = 0; j < avctx->height; j += 4) {
for (i = 0; i < avctx->width; i += 4) {
uint8_t *p = f->data[0] + i * 4 + j * f->linesize[0];
const int step = ctx->tex_fun(out, f->linesize[0], p);
out += step;
}
}
}
static int compress_texture(AVCodecContext *avctx, uint8_t *out, int out_length, const AVFrame *f)
{
HapContext *ctx = avctx->priv_data;
int i, j;
if (ctx->tex_size > out_length)
return AVERROR_BUFFER_TOO_SMALL;
for (j = 0; j < avctx->height; j += 4) {
for (i = 0; i < avctx->width; i += 4) {
uint8_t *p = f->data[0] + i * 4 + j * f->linesize[0];
const int step = ctx->tex_fun(out, f->linesize[0], p);
out += step;
}
}
return 0;
}
static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
int slice, int thread_nb)
{
HapContext *ctx = avctx->priv_data;
AVFrame *frame = arg;
const uint8_t *d = ctx->tex_data;
int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
int x, y;
int start_slice, end_slice;
int base_blocks_per_slice = h_block / ctx->slice_count;
int remainder_blocks = h_block % ctx->slice_count;
/* When the frame height (in blocks) doesn't divide evenly between the
* number of slices, spread the remaining blocks evenly between the first
* operations */
start_slice = slice * base_blocks_per_slice;
/* Add any extra blocks (one per slice) that have been added before this slice */
start_slice += FFMIN(slice, remainder_blocks);
end_slice = start_slice + base_blocks_per_slice;
/* Add an extra block if there are still remainder blocks to be accounted for */
if (slice < remainder_blocks)
end_slice++;
for (y = start_slice; y < end_slice; y++) {
uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
int off = y * w_block;
for (x = 0; x < w_block; x++) {
ctx->tex_fun(p + x * 16, frame->linesize[0],
d + (off + x) * ctx->tex_rat);
}
}
return 0;
}
