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ffmpeg.wasm-core
Commit 65a455a8 authored by Aurelien Jacobs's avatar Aurelien Jacobs
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Use pointers to avoid copying AVFrame. 

This ensure get_buffer() won't be confused with an AVFrame pointer
which looks like it wasn't released.

Originally committed as revision 8105 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 6ca0c110
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Showing with 33 additions and 30 deletions
libavcodec/roqvideo.c
View file @ 65a455a8
......@@ -51,8 +51,9 @@ typedef struct RoqContext {
AVCodecContext *avctx;
DSPContext dsp;
AVFrame last_frame;
AVFrame current_frame;
AVFrame frames[2];
AVFrame *last_frame;
AVFrame *current_frame;
int first_frame;
int y_stride;
int c_stride;
......@@ -87,14 +88,14 @@ static void apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
{
unsigned char *yptr;
yptr = ri->current_frame.data[0] + (y * ri->y_stride) + x;
yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
*yptr++ = cell->y0;
*yptr++ = cell->y1;
yptr += (ri->y_stride - 2);
*yptr++ = cell->y2;
*yptr++ = cell->y3;
ri->current_frame.data[1][(y/2) * (ri->c_stride) + x/2] = cell->u;
ri->current_frame.data[2][(y/2) * (ri->c_stride) + x/2] = cell->v;
ri->current_frame->data[1][(y/2) * (ri->c_stride) + x/2] = cell->u;
ri->current_frame->data[2][(y/2) * (ri->c_stride) + x/2] = cell->v;
}
static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
......@@ -103,9 +104,9 @@ static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
register unsigned char y0, y1, u, v;
unsigned char *yptr, *uptr, *vptr;
yptr = ri->current_frame.data[0] + (y * ri->y_stride) + x;
uptr = ri->current_frame.data[1] + (y/2) * (ri->c_stride) + x/2;
vptr = ri->current_frame.data[2] + (y/2) * (ri->c_stride) + x/2;
yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
uptr = ri->current_frame->data[1] + (y/2) * (ri->c_stride) + x/2;
vptr = ri->current_frame->data[2] + (y/2) * (ri->c_stride) + x/2;
row_inc = ri->y_stride - 4;
c_row_inc = (ri->c_stride) - 2;
......@@ -153,8 +154,8 @@ static void apply_motion_4x4(RoqContext *ri, int x, int y, unsigned char mv,
return;
}
pa = ri->current_frame.data[0] + (y * ri->y_stride) + x;
pb = ri->last_frame.data[0] + (my * ri->y_stride) + mx;
pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
for(i = 0; i < 4; i++) {
pa[0] = pb[0];
pa[1] = pb[1];
......@@ -165,8 +166,8 @@ static void apply_motion_4x4(RoqContext *ri, int x, int y, unsigned char mv,
}
hw = ri->y_stride/2;
pa = ri->current_frame.data[1] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame.data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
for(i = 0; i < 2; i++) {
switch(((my & 0x01) << 1) | (mx & 0x01)) {
......@@ -200,8 +201,8 @@ static void apply_motion_4x4(RoqContext *ri, int x, int y, unsigned char mv,
break;
}
pa = ri->current_frame.data[2] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame.data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
}
}
......@@ -222,8 +223,8 @@ static void apply_motion_8x8(RoqContext *ri, int x, int y,
return;
}
pa = ri->current_frame.data[0] + (y * ri->y_stride) + x;
pb = ri->last_frame.data[0] + (my * ri->y_stride) + mx;
pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
for(i = 0; i < 8; i++) {
pa[0] = pb[0];
pa[1] = pb[1];
......@@ -238,8 +239,8 @@ static void apply_motion_8x8(RoqContext *ri, int x, int y,
}
hw = ri->c_stride;
pa = ri->current_frame.data[1] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame.data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
for(j = 0; j < 2; j++) {
for(i = 0; i < 4; i++) {
switch(((my & 0x01) << 1) | (mx & 0x01)) {
......@@ -276,8 +277,8 @@ static void apply_motion_8x8(RoqContext *ri, int x, int y,
pb += ri->c_stride;
}
pa = ri->current_frame.data[2] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame.data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
}
}
......@@ -407,6 +408,8 @@ static int roq_decode_init(AVCodecContext *avctx)
s->avctx = avctx;
s->first_frame = 1;
s->last_frame = &s->frames[0];
s->current_frame = &s->frames[1];
avctx->pix_fmt = PIX_FMT_YUV420P;
avctx->has_b_frames = 0;
dsputil_init(&s->dsp, avctx);
......@@ -424,12 +427,12 @@ static int roq_decode_frame(AVCodecContext *avctx,
{
RoqContext *s = avctx->priv_data;
if (avctx->get_buffer(avctx, &s->current_frame)) {
if (avctx->get_buffer(avctx, s->current_frame)) {
av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
return -1;
}
s->y_stride = s->current_frame.linesize[0];
s->c_stride = s->current_frame.linesize[1];
s->y_stride = s->current_frame->linesize[0];
s->c_stride = s->current_frame->linesize[1];
s->buf = buf;
s->size = buf_size;
......@@ -439,13 +442,13 @@ static int roq_decode_frame(AVCodecContext *avctx,
if (s->first_frame)
s->first_frame = 0;
else
avctx->release_buffer(avctx, &s->last_frame);
/* shuffle frames */
s->last_frame = s->current_frame;
avctx->release_buffer(avctx, s->last_frame);
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->current_frame;
*(AVFrame*)data = *s->current_frame;
/* shuffle frames */
FFSWAP(AVFrame *, s->current_frame, s->last_frame);
return buf_size;
}
......@@ -455,8 +458,8 @@ static int roq_decode_end(AVCodecContext *avctx)
RoqContext *s = avctx->priv_data;
/* release the last frame */
if (s->last_frame.data[0])
avctx->release_buffer(avctx, &s->last_frame);
if (s->last_frame->data[0])
avctx->release_buffer(avctx, s->last_frame);
return 0;
}
......
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