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Code Issues Releases Activity

avcodec/rawdec: for 16-bit pix fmts, shift pixels when bits_per_coded_sample < 16

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Signed-off-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Peter Ross 2014-02-23 12:18:42 +11:00 committed by Michael Niedermayer
parent a3a4d07d6a
commit 7e23cfba76
1 changed files with 16 additions and 1 deletions
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17
libavcodec/rawdec.c
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@ -41,6 +41,7 @@ typedef struct RawVideoContext {
int flip;
int is_2_4_bpp; // 2 or 4 bpp raw in avi/mov
int is_yuv2;
int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
int tff;
} RawVideoContext;
@ -142,6 +143,7 @@ static av_cold int raw_init_decoder(AVCodecContext *avctx)
FFALIGN(avctx->width, 16),
avctx->height);
} else {
context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
context->frame_size = avpicture_get_size(avctx->pix_fmt, avctx->width,
avctx->height);
}
@ -175,7 +177,7 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
int buf_size = avpkt->size;
int linesize_align = 4;
int res, len;
int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2;
int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
AVFrame *frame = data;
AVPicture *picture = data;
@ -240,6 +242,19 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
return AVERROR(EINVAL);
}
if (context->is_lt_16bpp) {
int i;
uint8_t *dst = frame->buf[0]->data;
if (desc->flags & AV_PIX_FMT_FLAG_BE) {
for (i = 0; i + 1 < buf_size; i += 2)
AV_WB16(dst + i, AV_RB16(buf + i) << (16 - avctx->bits_per_coded_sample));
} else {
for (i = 0; i + 1 < buf_size; i += 2)
AV_WL16(dst + i, AV_RL16(buf + i) << (16 - avctx->bits_per_coded_sample));
}
buf = dst;
}
if ((res = avpicture_fill(picture, buf, avctx->pix_fmt,
avctx->width, avctx->height)) < 0) {
av_buffer_unref(&frame->buf[0]);