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xxan: make code independent of sizeof(AVFrame) 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-24 15:14:17 +01:00
parent 8097e5b212
commit 67607e20e8
1 changed files with 31 additions and 23 deletions
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54
libavcodec/xxan.c
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@ -30,7 +30,7 @@
typedef struct XanContext {
AVCodecContext *avctx;
AVFrame pic;
AVFrame *pic;
uint8_t *y_buffer;
uint8_t *scratch_buffer;
@ -38,6 +38,8 @@ typedef struct XanContext {
GetByteContext gb;
} XanContext;
static av_cold int xan_decode_end(AVCodecContext *avctx);
static av_cold int xan_decode_init(AVCodecContext *avctx)
{
XanContext *s = avctx->priv_data;
@ -57,7 +59,13 @@ static av_cold int xan_decode_init(AVCodecContext *avctx)
return AVERROR(ENOMEM);
s->scratch_buffer = av_malloc(s->buffer_size + 130);
if (!s->scratch_buffer) {
av_freep(&s->y_buffer);
xan_decode_end(avctx);
return AVERROR(ENOMEM);
}
s->pic = av_frame_alloc();
if (!s->pic) {
xan_decode_end(avctx);
return AVERROR(ENOMEM);
}
@ -195,8 +203,8 @@ static int xan_decode_chroma(AVCodecContext *avctx, unsigned chroma_off)
return dec_size;
}
U = s->pic.data[1];
V = s->pic.data[2];
U = s->pic->data[1];
V = s->pic->data[2];
src = s->scratch_buffer;
src_end = src + dec_size;
if (mode) {
@ -215,16 +223,16 @@ static int xan_decode_chroma(AVCodecContext *avctx, unsigned chroma_off)
V[i] = vval | (vval >> 5);
}
}
U += s->pic.linesize[1];
V += s->pic.linesize[2];
U += s->pic->linesize[1];
V += s->pic->linesize[2];
}
if (avctx->height & 1) {
memcpy(U, U - s->pic.linesize[1], avctx->width >> 1);
memcpy(V, V - s->pic.linesize[2], avctx->width >> 1);
memcpy(U, U - s->pic->linesize[1], avctx->width >> 1);
memcpy(V, V - s->pic->linesize[2], avctx->width >> 1);
}
} else {
uint8_t *U2 = U + s->pic.linesize[1];
uint8_t *V2 = V + s->pic.linesize[2];
uint8_t *U2 = U + s->pic->linesize[1];
uint8_t *V2 = V + s->pic->linesize[2];
for (j = 0; j < avctx->height >> 2; j++) {
for (i = 0; i < avctx->width >> 1; i += 2) {
@ -241,16 +249,16 @@ static int xan_decode_chroma(AVCodecContext *avctx, unsigned chroma_off)
V[i] = V[i+1] = V2[i] = V2[i+1] = vval | (vval >> 5);
}
}
U += s->pic.linesize[1] * 2;
V += s->pic.linesize[2] * 2;
U2 += s->pic.linesize[1] * 2;
V2 += s->pic.linesize[2] * 2;
U += s->pic->linesize[1] * 2;
V += s->pic->linesize[2] * 2;
U2 += s->pic->linesize[1] * 2;
V2 += s->pic->linesize[2] * 2;
}
if (avctx->height & 3) {
int lines = ((avctx->height + 1) >> 1) - (avctx->height >> 2) * 2;
memcpy(U, U - lines * s->pic.linesize[1], lines * s->pic.linesize[1]);
memcpy(V, V - lines * s->pic.linesize[2], lines * s->pic.linesize[2]);
memcpy(U, U - lines * s->pic->linesize[1], lines * s->pic->linesize[1]);
memcpy(V, V - lines * s->pic->linesize[2], lines * s->pic->linesize[2]);
}
}
@ -327,12 +335,12 @@ static int xan_decode_frame_type0(AVCodecContext *avctx)
}
src = s->y_buffer;
ybuf = s->pic.data[0];
ybuf = s->pic->data[0];
for (j = 0; j < avctx->height; j++) {
for (i = 0; i < avctx->width; i++)
ybuf[i] = (src[i] << 2) | (src[i] >> 3);
src += avctx->width;
ybuf += s->pic.linesize[0];
ybuf += s->pic->linesize[0];
}
return 0;
@ -373,12 +381,12 @@ static int xan_decode_frame_type1(AVCodecContext *avctx)
}
src = s->y_buffer;
ybuf = s->pic.data[0];
ybuf = s->pic->data[0];
for (j = 0; j < avctx->height; j++) {
for (i = 0; i < avctx->width; i++)
ybuf[i] = (src[i] << 2) | (src[i] >> 3);
src += avctx->width;
ybuf += s->pic.linesize[0];
ybuf += s->pic->linesize[0];
}
return 0;
@ -392,7 +400,7 @@ static int xan_decode_frame(AVCodecContext *avctx,
int ftype;
int ret;
if ((ret = ff_reget_buffer(avctx, &s->pic)) < 0)
if ((ret = ff_reget_buffer(avctx, s->pic)) < 0)
return ret;
bytestream2_init(&s->gb, avpkt->data, avpkt->size);
@ -411,7 +419,7 @@ static int xan_decode_frame(AVCodecContext *avctx,
if (ret)
return ret;
if ((ret = av_frame_ref(data, &s->pic)) < 0)
if ((ret = av_frame_ref(data, s->pic)) < 0)
return ret;
*got_frame = 1;
@ -423,7 +431,7 @@ static av_cold int xan_decode_end(AVCodecContext *avctx)
{
XanContext *s = avctx->priv_data;
av_frame_unref(&s->pic);
av_frame_free(&s->pic);
av_freep(&s->y_buffer);
av_freep(&s->scratch_buffer);