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Code Issues Releases Activity

avcodec/cyuv: Remove useless private context

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It just contains duplicates of values from AVCodecContext
as well as an write-only pointer to said AVCodecContext.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-10-18 13:30:19 +02:00
parent 20a1296bb4
commit d94a445e3d
1 changed files with 11 additions and 25 deletions
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36
libavcodec/cyuv.c
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@ -37,22 +37,11 @@
#include "decode.h"
#include "libavutil/internal.h"
typedef struct CyuvDecodeContext {
AVCodecContext *avctx;
int width, height;
} CyuvDecodeContext;
static av_cold int cyuv_decode_init(AVCodecContext *avctx)
{
CyuvDecodeContext *s = avctx->priv_data;
s->avctx = avctx;
s->width = avctx->width;
/* width needs to be divisible by 4 for this codec to work */
if (s->width & 0x3)
if (avctx->width & 0x3)
return AVERROR_INVALIDDATA;
s->height = avctx->height;
return 0;
}
@ -62,7 +51,6 @@ static int cyuv_decode_frame(AVCodecContext *avctx, AVFrame *frame,
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
CyuvDecodeContext *s=avctx->priv_data;
unsigned char *y_plane;
unsigned char *u_plane;
@ -80,7 +68,7 @@ static int cyuv_decode_frame(AVCodecContext *avctx, AVFrame *frame,
int stream_ptr;
unsigned char cur_byte;
int pixel_groups;
int rawsize = s->height * FFALIGN(s->width,2) * 2;
int rawsize = avctx->height * FFALIGN(avctx->width,2) * 2;
int ret;
if (avctx->codec_id == AV_CODEC_ID_AURA) {
@ -91,13 +79,13 @@ static int cyuv_decode_frame(AVCodecContext *avctx, AVFrame *frame,
* followed by (height) lines each with 3 bytes to represent groups
* of 4 pixels. Thus, the total size of the buffer ought to be:
* (3 * 16) + height * (width * 3 / 4) */
if (buf_size == 48 + s->height * (s->width * 3 / 4)) {
if (buf_size == 48 + avctx->height * (avctx->width * 3 / 4)) {
avctx->pix_fmt = AV_PIX_FMT_YUV411P;
} else if(buf_size == rawsize ) {
avctx->pix_fmt = AV_PIX_FMT_UYVY422;
} else {
av_log(avctx, AV_LOG_ERROR, "got a buffer with %d bytes when %d were expected\n",
buf_size, 48 + s->height * (s->width * 3 / 4));
buf_size, 48 + avctx->height * (avctx->width * 3 / 4));
return AVERROR_INVALIDDATA;
}
@ -112,8 +100,8 @@ static int cyuv_decode_frame(AVCodecContext *avctx, AVFrame *frame,
v_plane = frame->data[2];
if (buf_size == rawsize) {
int linesize = FFALIGN(s->width,2) * 2;
y_plane += frame->linesize[0] * s->height;
int linesize = FFALIGN(avctx->width, 2) * 2;
y_plane += frame->linesize[0] * avctx->height;
for (stream_ptr = 0; stream_ptr < rawsize; stream_ptr += linesize) {
y_plane -= frame->linesize[0];
memcpy(y_plane, buf+stream_ptr, linesize);
@ -122,10 +110,10 @@ static int cyuv_decode_frame(AVCodecContext *avctx, AVFrame *frame,
/* iterate through each line in the height */
for (y_ptr = 0, u_ptr = 0, v_ptr = 0;
y_ptr < (s->height * frame->linesize[0]);
y_ptr += frame->linesize[0] - s->width,
u_ptr += frame->linesize[1] - s->width / 4,
v_ptr += frame->linesize[2] - s->width / 4) {
y_ptr < (avctx->height * frame->linesize[0]);
y_ptr += frame->linesize[0] - avctx->width,
u_ptr += frame->linesize[1] - avctx->width / 4,
v_ptr += frame->linesize[2] - avctx->width / 4) {
/* reset predictors */
cur_byte = buf[stream_ptr++];
@ -144,7 +132,7 @@ static int cyuv_decode_frame(AVCodecContext *avctx, AVFrame *frame,
y_plane[y_ptr++] = y_pred;
/* iterate through the remaining pixel groups (4 pixels/group) */
pixel_groups = s->width / 4 - 1;
pixel_groups = avctx->width / 4 - 1;
while (pixel_groups--) {
cur_byte = buf[stream_ptr++];
@ -180,7 +168,6 @@ const FFCodec ff_aura_decoder = {
CODEC_LONG_NAME("Auravision AURA"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_AURA,
.priv_data_size = sizeof(CyuvDecodeContext),
.init = cyuv_decode_init,
FF_CODEC_DECODE_CB(cyuv_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,
@ -193,7 +180,6 @@ const FFCodec ff_cyuv_decoder = {
CODEC_LONG_NAME("Creative YUV (CYUV)"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_CYUV,
.priv_data_size = sizeof(CyuvDecodeContext),
.init = cyuv_decode_init,
FF_CODEC_DECODE_CB(cyuv_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,