If you have a better solution, feel free to change the stride calculation code.
Original description follows:This patch removes the monowhite switching code for 1 bpp raw AVI without a palette. I don't see any reason to keep it, since it's semantically incorrect to use monowhite for palettized data in my book, it adds unnecessary noise to the code, and it's inconsistent with the rest of the code in FFmpeg.
For black & white AVI or QuickTime files, in order to produce a monochrome nut file, force the pixel format with "-pix_fmt monow" or "-pix_fmt monob".
Unfortunately, there is a problem with converting from pal8 to monow, and I know what it is now. There seems to be some weird dithering going on of the white color, so there will be black pixels here and there in the monow output. A better way is to use "ffmpeg -i 1bpp.avi -vcodec copy -vtag B1W0 1bpp.nut". The "-vtag" option is currently needed, otherwise FFmpeg will use a RGB[15] codec tag for some reason.
I have also updated the 1 bpp FATE test files (once again). Mats -- Mats Peterson http://matsp888.no-ip.org/~mats/
>From dc621b883570f00226a55dcbdeea6e23980a28ad Mon Sep 17 00:00:00 2001
From: Mats Peterson <matsp...@yahoo.com>
Date: Wed, 10 Feb 2016 10:01:02 +0100
Subject: [PATCH v6] lavc/rawdec: Remove monowhite switching code for 1 bpp AVI without a palette
---
libavcodec/rawdec.c | 37 +++++++++----------------------------
tests/ref/vsynth/vsynth1-bpp1 | 4 ++--
tests/ref/vsynth/vsynth2-bpp1 | 4 ++--
tests/ref/vsynth/vsynth3-bpp1 | 4 ++--
tests/ref/vsynth/vsynth_lena-bpp1 | 4 ++--
5 files changed, 17 insertions(+), 36 deletions(-)
diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c
index b7ce2b6..d2aacda 100644
--- a/libavcodec/rawdec.c
+++ b/libavcodec/rawdec.c
@@ -100,7 +100,7 @@ static av_cold int raw_init_decoder(AVCodecContext *avctx)
avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
else {
memset(context->palette->data, 0, AVPALETTE_SIZE);
- if (avctx->bits_per_coded_sample <= 1)
+ if (avctx->bits_per_coded_sample == 1)
memset(context->palette->data, 0xff, 4);
}
}
@@ -121,17 +121,13 @@ static av_cold int raw_init_decoder(AVCodecContext *avctx)
if (avctx->codec_tag == MKTAG('B','1','W','0') ||
avctx->codec_tag == MKTAG('B','0','W','1'))
context->is_nut_mono = 1;
- else if (avctx->codec_tag == MKTAG('P','A','L','8'))
+ else if (avctx->codec_tag == MKTAG('P','A','L',8))
context->is_nut_pal8 = 1;
if (avctx->codec_tag == AV_RL32("yuv2") &&
avctx->pix_fmt == AV_PIX_FMT_YUYV422)
context->is_yuv2 = 1;
- /* Temporary solution until PAL8 is implemented in nut */
- if (context->is_pal8 && avctx->bits_per_coded_sample == 1)
- avctx->pix_fmt = AV_PIX_FMT_NONE;
-
return 0;
}
@@ -192,33 +188,16 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
return AVERROR_INVALIDDATA;
}
- if (context->is_nut_mono)
- stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
- else if (context->is_nut_pal8)
- stride = avctx->width;
- else
- stride = avpkt->size / avctx->height;
+ stride = (avpkt->size - (context->is_nut_pal8 ? AVPALETTE_SIZE : 0)) / avctx->height;
+
+ av_log(avctx, AV_LOG_DEBUG, "PACKET SIZE: %d\n", avpkt->size);
+ av_log(avctx, AV_LOG_DEBUG, "STRIDE: %d\n", stride);
- if (stride == 0 || avpkt->size < stride * avctx->height) {
+ if (stride <= 0 || avpkt->size < stride * avctx->height) {
av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size);
return AVERROR_INVALIDDATA;
}
- /* Temporary solution until PAL8 is implemented in nut */
- if (avctx->pix_fmt == AV_PIX_FMT_NONE &&
- avctx->bits_per_coded_sample == 1 &&
- avctx->frame_number == 0 &&
- context->palette &&
- AV_RB64(context->palette->data) == 0xFFFFFFFF00000000
- ) {
- const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
- if (!pal) {
- avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
- context->is_pal8 = 0;
- context->is_mono = 1;
- } else
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
- }
desc = av_pix_fmt_desc_get(avctx->pix_fmt);
if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4
@@ -417,6 +396,8 @@ static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
(desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) {
+ if (context->is_nut_pal8)
+ memcpy(context->palette->data, avpkt->data + avpkt->size - AVPALETTE_SIZE, AVPALETTE_SIZE);
frame->buf[1] = av_buffer_ref(context->palette);
if (!frame->buf[1]) {
av_buffer_unref(&frame->buf[0]);
diff --git a/tests/ref/vsynth/vsynth1-bpp1 b/tests/ref/vsynth/vsynth1-bpp1
index 32dab11..378f990 100644
--- a/tests/ref/vsynth/vsynth1-bpp1
+++ b/tests/ref/vsynth/vsynth1-bpp1
@@ -1,4 +1,4 @@
3e5e0f4afb3a0350440e86b1ea56cec9 *tests/data/fate/vsynth1-bpp1.avi
640452 tests/data/fate/vsynth1-bpp1.avi
-ccef5f5d5b0392f1d01c200499dac657 *tests/data/fate/vsynth1-bpp1.out.rawvideo
-stddev: 97.30 PSNR: 8.37 MAXDIFF: 237 bytes: 7603200/ 7603200
+853694f3c1aa3ef3807ab1fccbeefe7b *tests/data/fate/vsynth1-bpp1.out.rawvideo
+stddev: 84.44 PSNR: 9.60 MAXDIFF: 221 bytes: 7603200/ 7603200
diff --git a/tests/ref/vsynth/vsynth2-bpp1 b/tests/ref/vsynth/vsynth2-bpp1
index d010bbd..ae8fd27 100644
--- a/tests/ref/vsynth/vsynth2-bpp1
+++ b/tests/ref/vsynth/vsynth2-bpp1
@@ -1,4 +1,4 @@
771437c9038b44f4e2d4ff764c1c3821 *tests/data/fate/vsynth2-bpp1.avi
640452 tests/data/fate/vsynth2-bpp1.avi
-ba70b5aebc786e625af6bd7f7ec82717 *tests/data/fate/vsynth2-bpp1.out.rawvideo
-stddev: 81.63 PSNR: 9.89 MAXDIFF: 237 bytes: 7603200/ 7603200
+94261fc8aa20130cbd4361e15b742ef7 *tests/data/fate/vsynth2-bpp1.out.rawvideo
+stddev: 70.29 PSNR: 11.19 MAXDIFF: 221 bytes: 7603200/ 7603200
diff --git a/tests/ref/vsynth/vsynth3-bpp1 b/tests/ref/vsynth/vsynth3-bpp1
index f84808a..6f71248 100644
--- a/tests/ref/vsynth/vsynth3-bpp1
+++ b/tests/ref/vsynth/vsynth3-bpp1
@@ -1,4 +1,4 @@
a5e6d1eff2f6fc3bba31e3bb8753b905 *tests/data/fate/vsynth3-bpp1.avi
15352 tests/data/fate/vsynth3-bpp1.avi
-75e8ee0c0b0ada4515455d9f29377a16 *tests/data/fate/vsynth3-bpp1.out.rawvideo
-stddev: 97.70 PSNR: 8.33 MAXDIFF: 248 bytes: 86700/ 86700
+79076b5fc43ee2a2284c0cde991d21f3 *tests/data/fate/vsynth3-bpp1.out.rawvideo
+stddev: 84.88 PSNR: 9.55 MAXDIFF: 232 bytes: 86700/ 86700
diff --git a/tests/ref/vsynth/vsynth_lena-bpp1 b/tests/ref/vsynth/vsynth_lena-bpp1
index d4570c7..3e250a8 100644
--- a/tests/ref/vsynth/vsynth_lena-bpp1
+++ b/tests/ref/vsynth/vsynth_lena-bpp1
@@ -1,4 +1,4 @@
d53d08c755ffde5fca744f0f941bfcb1 *tests/data/fate/vsynth_lena-bpp1.avi
640452 tests/data/fate/vsynth_lena-bpp1.avi
-9a66df9009670b0a593d889975246c00 *tests/data/fate/vsynth_lena-bpp1.out.rawvideo
-stddev: 96.36 PSNR: 8.45 MAXDIFF: 233 bytes: 7603200/ 7603200
+dce624117fcd2b16f38e0a0a62b13fa7 *tests/data/fate/vsynth_lena-bpp1.out.rawvideo
+stddev: 83.18 PSNR: 9.73 MAXDIFF: 217 bytes: 7603200/ 7603200
--
1.7.10.4
3x3.nut
Description: Binary data
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
