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Code Issues Releases Activity

lavc/rawdec: Use 16-byte line alignment for AV_PIX_FMT_MONOWHITE

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The line alignment for 1 bpp raw AV_PIX_FMT_MONOWHITE video (currently
used for AVI) was previously 4 bytes, which generated alignment warning
messages, not only for odd-width files. The alignment is now 16 bytes.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Mats Peterson
2016-01-25 18:09:18 +01:00
committed by Michael Niedermayer
parent 209f50e16b
commit 191ec55c9f
1 changed files with 19 additions and 11 deletions
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30
libavcodec/rawdec.c
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@ -41,7 +41,7 @@ typedef struct RawVideoContext {
AVBufferRef *palette; AVBufferRef *palette;
int frame_size; /* size of the frame in bytes */ int frame_size; /* size of the frame in bytes */
int flip; int flip;
int is_1_2_4_8_bpp; // 1 bpp in mov, and 2, 4 and 8 bpp in avi/mov int is_1_2_4_8_bpp; // 1, 2, 4 and 8 bpp in avi/mov
int is_yuv2; int is_yuv2;
int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16 int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
int tff; int tff;
@ -176,12 +176,18 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4 if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4
|| avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1) && || avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1) &&
avctx->pix_fmt == AV_PIX_FMT_PAL8 && (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_MONOWHITE) &&
(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) { (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
context->is_1_2_4_8_bpp = 1; context->is_1_2_4_8_bpp = 1;
context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, if (avctx->bits_per_coded_sample == 1 && avctx->pix_fmt == AV_PIX_FMT_MONOWHITE) {
FFALIGN(avctx->width, 16), int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
avctx->height, 1); context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
FFALIGN(row_bytes, 16) * 8,
avctx->height, 1);
} else
context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
FFALIGN(avctx->width, 16),
avctx->height, 1);
} else { } else {
context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16; 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 = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width,
@ -217,16 +223,18 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
if (!frame->buf[0]) if (!frame->buf[0])
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
// 1 bpp in mov, and 2, 4 and 8 bpp in avi/mov // 1, 2, 4 and 8 bpp in avi/mov
if (context->is_1_2_4_8_bpp) { if (context->is_1_2_4_8_bpp) {
int i, j, row_pix = 0; int i, j, row_pix = 0;
uint8_t *dst = frame->buf[0]->data; uint8_t *dst = frame->buf[0]->data;
buf_size = context->frame_size - AVPALETTE_SIZE; buf_size = context->frame_size -
if (avctx->bits_per_coded_sample == 8) { (avctx->pix_fmt == AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
if (avctx->bits_per_coded_sample == 8 || avctx->pix_fmt == AV_PIX_FMT_MONOWHITE) {
int pix_per_byte = avctx->pix_fmt == AV_PIX_FMT_MONOWHITE ? 8 : 1;
for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) { for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
dst[j] = buf[i]; dst[j] = buf[i];
row_pix++; row_pix += pix_per_byte;
if (row_pix == avctx->width) { if (row_pix >= avctx->width) {
i += avpkt_stride - (i % avpkt_stride) - 1; i += avpkt_stride - (i % avpkt_stride) - 1;
j += 16 - (j % 16) - 1; j += 16 - (j % 16) - 1;
row_pix = 0; row_pix = 0;