[FFmpeg-cvslog] lavc/rawdec: Use 16-byte line alignment for 1, 2, 4 and 8 bpp
Mats Peterson
git at videolan.org
Mon Jan 25 11:12:17 CET 2016
ffmpeg | branch: master | Mats Peterson <matsp888 at yahoo.com> | Mon Jan 25 03:59:49 2016 +0100| [82325dbec144114f213a4f29450b7f5153b6ef0f] | committer: Michael Niedermayer
lavc/rawdec: Use 16-byte line alignment for 1, 2, 4 and 8 bpp
This patch aligns the lines of 1 bpp depth for QuickTime, and 2, 4 and 8
bpp depths for AVI and QuickTime, on 16-byte boundaries. At the same
time, the packet row stride is properly catered for.
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=82325dbec144114f213a4f29450b7f5153b6ef0f
---
libavcodec/rawdec.c | 87 +++++++++++++++++++++++++++++++++------------------
1 file changed, 57 insertions(+), 30 deletions(-)
diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c
index 1ab7112..0ddb521 100644
--- a/libavcodec/rawdec.c
+++ b/libavcodec/rawdec.c
@@ -41,7 +41,7 @@ typedef struct RawVideoContext {
AVBufferRef *palette;
int frame_size; /* size of the frame in bytes */
int flip;
- int is_1_2_4_bpp; // 1 bpp raw in mov, and 2 or 4 bpp raw in avi/mov
+ int is_1_2_4_8_bpp; // 1 bpp in mov, and 2, 4 and 8 bpp in avi/mov
int is_yuv2;
int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
int tff;
@@ -156,19 +156,20 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
RawVideoContext *context = avctx->priv_data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
+ int avpkt_stride = avpkt->size / avctx->height;
int linesize_align = 4;
int res, len;
int need_copy;
AVFrame *frame = data;
- if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2
- || avctx->bits_per_coded_sample == 1) &&
+ 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->pix_fmt == AV_PIX_FMT_PAL8 &&
(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))) {
- context->is_1_2_4_bpp = 1;
+ context->is_1_2_4_8_bpp = 1;
context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
- FFALIGN(avctx->width, 32),
+ FFALIGN(avctx->width, 16),
avctx->height, 1);
} else {
context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
@@ -178,7 +179,7 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
if (context->frame_size < 0)
return context->frame_size;
- need_copy = !avpkt->buf || context->is_1_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
+ need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp;
frame->pict_type = AV_PICTURE_TYPE_I;
frame->key_frame = 1;
@@ -205,39 +206,65 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
if (!frame->buf[0])
return AVERROR(ENOMEM);
- // 1 bpp raw in mov, and 2 or 4 bpp raw in avi/mov
- if (context->is_1_2_4_bpp) {
- int i;
+ // 1 bpp in mov, and 2, 4 and 8 bpp in avi/mov
+ if (context->is_1_2_4_8_bpp) {
+ int i, j, row_pix = 0;
uint8_t *dst = frame->buf[0]->data;
buf_size = context->frame_size - AVPALETTE_SIZE;
- if (avctx->bits_per_coded_sample == 4) {
- for (i = 0; 2 * i + 1 < buf_size && i<avpkt->size; i++) {
- dst[2 * i + 0] = buf[i] >> 4;
- dst[2 * i + 1] = buf[i] & 15;
+ if (avctx->bits_per_coded_sample == 8) {
+ for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
+ dst[j] = buf[i];
+ row_pix++;
+ if (row_pix == avctx->width) {
+ i += avpkt_stride - (i % avpkt_stride) - 1;
+ j += 16 - (j % 16) - 1;
+ row_pix = 0;
+ }
+ }
+ } else if (avctx->bits_per_coded_sample == 4) {
+ for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) {
+ dst[2 * j + 0] = buf[i] >> 4;
+ dst[2 * j + 1] = buf[i] & 15;
+ row_pix += 2;
+ if (row_pix >= avctx->width) {
+ i += avpkt_stride - (i % avpkt_stride) - 1;
+ j += 8 - (j % 8) - 1;
+ row_pix = 0;
+ }
}
- linesize_align = 8;
} else if (avctx->bits_per_coded_sample == 2) {
- for (i = 0; 4 * i + 3 < buf_size && i<avpkt->size; i++) {
- dst[4 * i + 0] = buf[i] >> 6;
- dst[4 * i + 1] = buf[i] >> 4 & 3;
- dst[4 * i + 2] = buf[i] >> 2 & 3;
- dst[4 * i + 3] = buf[i] & 3;
+ for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) {
+ dst[4 * j + 0] = buf[i] >> 6;
+ dst[4 * j + 1] = buf[i] >> 4 & 3;
+ dst[4 * j + 2] = buf[i] >> 2 & 3;
+ dst[4 * j + 3] = buf[i] & 3;
+ row_pix += 4;
+ if (row_pix >= avctx->width) {
+ i += avpkt_stride - (i % avpkt_stride) - 1;
+ j += 4 - (j % 4) - 1;
+ row_pix = 0;
+ }
}
- linesize_align = 16;
} else {
av_assert0(avctx->bits_per_coded_sample == 1);
- for (i = 0; 8 * i + 7 < buf_size && i<avpkt->size; i++) {
- dst[8 * i + 0] = buf[i] >> 7 & 1;
- dst[8 * i + 1] = buf[i] >> 6 & 1;
- dst[8 * i + 2] = buf[i] >> 5 & 1;
- dst[8 * i + 3] = buf[i] >> 4 & 1;
- dst[8 * i + 4] = buf[i] >> 3 & 1;
- dst[8 * i + 5] = buf[i] >> 2 & 1;
- dst[8 * i + 6] = buf[i] >> 1 & 1;
- dst[8 * i + 7] = buf[i] & 1;
+ for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) {
+ dst[8 * j + 0] = buf[i] >> 7;
+ dst[8 * j + 1] = buf[i] >> 6 & 1;
+ dst[8 * j + 2] = buf[i] >> 5 & 1;
+ dst[8 * j + 3] = buf[i] >> 4 & 1;
+ dst[8 * j + 4] = buf[i] >> 3 & 1;
+ dst[8 * j + 5] = buf[i] >> 2 & 1;
+ dst[8 * j + 6] = buf[i] >> 1 & 1;
+ dst[8 * j + 7] = buf[i] & 1;
+ row_pix += 8;
+ if (row_pix >= avctx->width) {
+ i += avpkt_stride - (i % avpkt_stride) - 1;
+ j += 2 - (j % 2) - 1;
+ row_pix = 0;
+ }
}
- linesize_align = 32;
}
+ linesize_align = 16;
buf = dst;
} else if (context->is_lt_16bpp) {
uint8_t *dst = frame->buf[0]->data;
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