Eliminated some calculations inside loops.
Mats
>From e836bfee99b6de39acfe023c3a50b4e5b53f82e1 Mon Sep 17 00:00:00 2001
From: Mats Peterson <matsp...@yahoo.com>
Date: Mon, 18 Jan 2016 08:40:57 +0100
Subject: [PATCH v4] lavc/rawdec: Use AV_PIX_FMT_PAL8 for 1-bit raw QuickTime video
Match the use of AV_PIX_FMT_PAL8 for 1-bit QuickTime Animation in
lavc/qtrle. To reiterate, 1-bit video is not necessary black & white in
QuickTime, merely bi-level. The two colors can be any color. The palette,
either included in the sample description, or the default Macintosh
palette (black & white for 1-bit video) will be set in lavf/qtpalette.
See the QuickTime File Format Specification for details.
---
libavcodec/raw.c | 4 ++--
libavcodec/rawdec.c | 49 +++++++++++++++++++++++++++++++------------------
2 files changed, 33 insertions(+), 20 deletions(-)
diff --git a/libavcodec/raw.c b/libavcodec/raw.c
index cda70ac..3f2cc11 100644
--- a/libavcodec/raw.c
+++ b/libavcodec/raw.c
@@ -255,13 +255,13 @@ const PixelFormatTag avpriv_pix_fmt_bps_avi[] = {
};
const PixelFormatTag avpriv_pix_fmt_bps_mov[] = {
- { AV_PIX_FMT_MONOWHITE, 1 },
+ { AV_PIX_FMT_PAL8, 1 },
{ AV_PIX_FMT_PAL8, 2 },
{ AV_PIX_FMT_PAL8, 4 },
{ AV_PIX_FMT_PAL8, 8 },
{ AV_PIX_FMT_RGB555BE, 16 },
{ AV_PIX_FMT_RGB24, 24 },
{ AV_PIX_FMT_ARGB, 32 },
- { AV_PIX_FMT_MONOWHITE,33 },
+ { AV_PIX_FMT_PAL8, 33 },
{ AV_PIX_FMT_NONE, 0 },
};
diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c
index 50cee39..0f765af 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_2_4_bpp; // 2 or 4 bpp raw in avi/mov
+ int is_1_2_4_bpp; // 1 bpp raw in mov, and 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;
@@ -159,12 +159,13 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
AVFrame *frame = data;
- if ((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
+ if ((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_2_4_bpp = 1;
+ context->is_1_2_4_bpp = 1;
context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
- FFALIGN(avctx->width, 16),
+ FFALIGN(avctx->width, 32),
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;
@@ -174,7 +175,7 @@ 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_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
+ need_copy = !avpkt->buf || context->is_1_2_4_bpp || context->is_yuv2 || context->is_lt_16bpp;
frame->pict_type = AV_PICTURE_TYPE_I;
frame->key_frame = 1;
@@ -201,26 +202,38 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
if (!frame->buf[0])
return AVERROR(ENOMEM);
- //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
- if (context->is_2_4_bpp) {
- int i;
+ // 1 bpp raw in mov, and 2 or 4 bpp raw in avi/mov
+ if (context->is_1_2_4_bpp) {
+ int i, j = 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;
+ for (i = 0; j + 1 < buf_size && i<avpkt->size; i++) {
+ dst[j++] = buf[i] >> 4;
+ dst[j++] = buf[i] & 15;
}
linesize_align = 8;
- } else {
- av_assert0(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;
+ } else if (avctx->bits_per_coded_sample == 2) {
+ for (i = 0; j + 3 < buf_size && i<avpkt->size; i++) {
+ dst[j++] = buf[i] >> 6;
+ dst[j++] = buf[i] >> 4 & 3;
+ dst[j++] = buf[i] >> 2 & 3;
+ dst[j++] = buf[i] & 3;
}
linesize_align = 16;
+ } else {
+ av_assert0(avctx->bits_per_coded_sample == 1);
+ for (i = 0; j + 7 < buf_size && i<avpkt->size; i++) {
+ dst[j++] = buf[i] >> 7 & 1;
+ dst[j++] = buf[i] >> 6 & 1;
+ dst[j++] = buf[i] >> 5 & 1;
+ dst[j++] = buf[i] >> 4 & 1;
+ dst[j++] = buf[i] >> 3 & 1;
+ dst[j++] = buf[i] >> 2 & 1;
+ dst[j++] = buf[i] >> 1 & 1;
+ dst[j++] = buf[i] & 1;
+ }
+ linesize_align = 32;
}
buf = dst;
} else if (context->is_lt_16bpp) {
--
1.7.10.4
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