Skip to content

F
ffmpeg.wasm-core
Commit 89d26797 authored by Ronald S. Bultje's avatar Ronald S. Bultje
Browse files
Options

ulti: convert to new bytestream API.

parent 3d72a6f1
Hide whitespace changes
Inline Side-by-side
Showing with 38 additions and 40 deletions
libavcodec/bytestream.h
View file @ 89d26797
......@@ -39,11 +39,15 @@ static av_always_inline void bytestream_put_ ##name(uint8_t **b, const type valu
write(*b, value);\
(*b) += bytes;\
}\
static av_always_inline type bytestream2_get_ ## name ## u(GetByteContext *g)\
{\
return bytestream_get_ ## name(&g->buffer);\
}\
static av_always_inline type bytestream2_get_ ## name(GetByteContext *g)\
{\
if (g->buffer_end - g->buffer < bytes)\
return 0;\
return bytestream_get_ ## name(&g->buffer);\
return bytestream2_get_ ## name ## u(g);\
}\
static av_always_inline type bytestream2_peek_ ## name(GetByteContext *g)\
{\
......
libavcodec/ulti.c
View file @ 89d26797
......@@ -38,16 +38,9 @@ typedef struct UltimotionDecodeContext {
int width, height, blocks;
AVFrame frame;
const uint8_t *ulti_codebook;
GetByteContext gb;
} UltimotionDecodeContext;
#define CHECK_OVERREAD_SIZE(size) \
do { \
if (buf_end - buf < (size)) { \
av_log(avctx, AV_LOG_ERROR, "Insufficient data\n"); \
return AVERROR_INVALIDDATA; \
} \
} while(0)
static av_cold int ulti_decode_init(AVCodecContext *avctx)
{
UltimotionDecodeContext *s = avctx->priv_data;
......@@ -231,7 +224,6 @@ static int ulti_decode_frame(AVCodecContext *avctx,
int i;
int skip;
int tmp;
const uint8_t *buf_end = buf + buf_size;
s->frame.reference = 1;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
......@@ -240,18 +232,20 @@ static int ulti_decode_frame(AVCodecContext *avctx,
return -1;
}
bytestream2_init(&s->gb, buf, buf_size);
while(!done) {
int idx;
if(blocks >= s->blocks || y >= s->height)
break;//all blocks decoded
CHECK_OVERREAD_SIZE(1);
idx = *buf++;
if (bytestream2_get_bytes_left(&s->gb) < 1)
goto err;
idx = bytestream2_get_byteu(&s->gb);
if((idx & 0xF8) == 0x70) {
switch(idx) {
case 0x70: //change modifier
CHECK_OVERREAD_SIZE(1);
modifier = *buf++;
modifier = bytestream2_get_byte(&s->gb);
if(modifier>1)
av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier);
break;
......@@ -265,8 +259,7 @@ static int ulti_decode_frame(AVCodecContext *avctx,
done = 1;
break;
case 0x74: //skip some blocks
CHECK_OVERREAD_SIZE(1);
skip = *buf++;
skip = bytestream2_get_byte(&s->gb);
if ((blocks + skip) >= s->blocks)
break;
blocks += skip;
......@@ -293,8 +286,7 @@ static int ulti_decode_frame(AVCodecContext *avctx,
} else {
cf = 0;
if (idx) {
CHECK_OVERREAD_SIZE(1);
chroma = *buf++;
chroma = bytestream2_get_byte(&s->gb);
}
}
for (i = 0; i < 4; i++) { // for every subblock
......@@ -302,15 +294,13 @@ static int ulti_decode_frame(AVCodecContext *avctx,
if(!code) //skip subblock
continue;
if(cf) {
CHECK_OVERREAD_SIZE(1);
chroma = *buf++;
chroma = bytestream2_get_byte(&s->gb);
}
tx = x + block_coords[i * 2];
ty = y + block_coords[(i * 2) + 1];
switch(code) {
case 1:
CHECK_OVERREAD_SIZE(1);
tmp = *buf++;
tmp = bytestream2_get_byte(&s->gb);
angle = angle_by_index[(tmp >> 6) & 0x3];
......@@ -330,8 +320,7 @@ static int ulti_decode_frame(AVCodecContext *avctx,
case 2:
if (modifier) { // unpack four luma samples
CHECK_OVERREAD_SIZE(3);
tmp = bytestream_get_be24(&buf);
tmp = bytestream2_get_be24(&s->gb);
Y[0] = (tmp >> 18) & 0x3F;
Y[1] = (tmp >> 12) & 0x3F;
......@@ -339,8 +328,7 @@ static int ulti_decode_frame(AVCodecContext *avctx,
Y[3] = tmp & 0x3F;
angle = 16;
} else { // retrieve luma samples from codebook
CHECK_OVERREAD_SIZE(2);
tmp = bytestream_get_be16(&buf);
tmp = bytestream2_get_be16(&s->gb);
angle = (tmp >> 12) & 0xF;
tmp &= 0xFFF;
......@@ -356,27 +344,27 @@ static int ulti_decode_frame(AVCodecContext *avctx,
if (modifier) { // all 16 luma samples
uint8_t Luma[16];
CHECK_OVERREAD_SIZE(12);
tmp = bytestream_get_be24(&buf);
if (bytestream2_get_bytes_left(&s->gb) < 12)
goto err;
tmp = bytestream2_get_be24u(&s->gb);
Luma[0] = (tmp >> 18) & 0x3F;
Luma[1] = (tmp >> 12) & 0x3F;
Luma[2] = (tmp >> 6) & 0x3F;
Luma[3] = tmp & 0x3F;
tmp = bytestream_get_be24(&buf);
tmp = bytestream2_get_be24u(&s->gb);
Luma[4] = (tmp >> 18) & 0x3F;
Luma[5] = (tmp >> 12) & 0x3F;
Luma[6] = (tmp >> 6) & 0x3F;
Luma[7] = tmp & 0x3F;
tmp = bytestream_get_be24(&buf);
tmp = bytestream2_get_be24u(&s->gb);
Luma[8] = (tmp >> 18) & 0x3F;
Luma[9] = (tmp >> 12) & 0x3F;
Luma[10] = (tmp >> 6) & 0x3F;
Luma[11] = tmp & 0x3F;
tmp = bytestream_get_be24(&buf);
tmp = bytestream2_get_be24u(&s->gb);
Luma[12] = (tmp >> 18) & 0x3F;
Luma[13] = (tmp >> 12) & 0x3F;
Luma[14] = (tmp >> 6) & 0x3F;
......@@ -384,22 +372,23 @@ static int ulti_decode_frame(AVCodecContext *avctx,
ulti_convert_yuv(&s->frame, tx, ty, Luma, chroma);
} else {
CHECK_OVERREAD_SIZE(4);
tmp = *buf++;
if (bytestream2_get_bytes_left(&s->gb) < 4)
goto err;
tmp = bytestream2_get_byteu(&s->gb);
if(tmp & 0x80) {
angle = (tmp >> 4) & 0x7;
tmp = (tmp << 8) + *buf++;
tmp = (tmp << 8) + bytestream2_get_byteu(&s->gb);
Y[0] = (tmp >> 6) & 0x3F;
Y[1] = tmp & 0x3F;
Y[2] = (*buf++) & 0x3F;
Y[3] = (*buf++) & 0x3F;
Y[2] = bytestream2_get_byteu(&s->gb) & 0x3F;
Y[3] = bytestream2_get_byteu(&s->gb) & 0x3F;
ulti_grad(&s->frame, tx, ty, Y, chroma, angle); //draw block
} else { // some patterns
int f0, f1;
f0 = *buf++;
f0 = bytestream2_get_byteu(&s->gb);
f1 = tmp;
Y[0] = (*buf++) & 0x3F;
Y[1] = (*buf++) & 0x3F;
Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F;
Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F;
ulti_pattern(&s->frame, tx, ty, f1, f0, Y[0], Y[1], chroma);
}
}
......@@ -421,6 +410,11 @@ static int ulti_decode_frame(AVCodecContext *avctx,
*(AVFrame*)data= s->frame;
return buf_size;
err:
av_log(avctx, AV_LOG_ERROR,
"Insufficient data\n");
return AVERROR_INVALIDDATA;
}
AVCodec ff_ulti_decoder = {
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment