[SCM] libav/experimental: Targa image decoder
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:52:05 UTC 2013
The following commit has been merged in the experimental branch:
commit 3689cf16497109974777194e6ca18316c758d963
Author: Kostya Shishkov <kostya.shishkov at gmail.com>
Date: Wed Oct 11 04:15:04 2006 +0000
Targa image decoder
Originally committed as revision 6640 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/Changelog b/Changelog
index 1bcfe36..82f7b22 100644
--- a/Changelog
+++ b/Changelog
@@ -59,6 +59,7 @@ version <next>
- VP5 video decoder
- VP6 video decoder
- WavPack lossless audio decoder
+- Targa (.TGA) picture decoder
version 0.4.9-pre1:
diff --git a/MAINTAINERS b/MAINTAINERS
index d73d55d..4d83324 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -155,6 +155,7 @@ Codecs:
snow.c Michael Niedermayer, Loren Merritt
sonic.c Alex Beregszaszi
svq3.c Michael Niedermayer
+ targa.c Kostya Shishkov
truemotion1* Mike Melanson
truemotion2* Kostya Shishkov
truespeech.c Kostya Shishkov
diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi
index c41807d..b4333be 100644
--- a/doc/ffmpeg-doc.texi
+++ b/doc/ffmpeg-doc.texi
@@ -753,6 +753,7 @@ following image formats are supported:
@item .Y.U.V @tab X @tab X @tab one raw file per component
@item animated GIF @tab X @tab X @tab Only uncompressed GIFs are generated.
@item PNG @tab X @tab X @tab 2 bit and 4 bit/pixel not supported yet.
+ at item Targa @tab @tab X @tab Targa (.TGA) image format.
@item SGI @tab X @tab X @tab SGI RGB image format
@end multitable
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index ac1c88b..da5236e 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -131,6 +131,7 @@ OBJS-$(CONFIG_SONIC_LS_DECODER) += sonic.o
OBJS-$(CONFIG_SVQ1_DECODER) += svq1.o
OBJS-$(CONFIG_SVQ1_ENCODER) += svq1.o
OBJS-$(CONFIG_SVQ3_DECODER) += h264.o
+OBJS-$(CONFIG_TARGA_DECODER) += targa.o
OBJS-$(CONFIG_THEORA_DECODER) += vp3.o
OBJS-$(CONFIG_TRUEMOTION1_DECODER) += truemotion1.o
OBJS-$(CONFIG_TRUEMOTION2_DECODER) += truemotion2.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 8307457..8cd2542 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -545,6 +545,9 @@ void avcodec_register_all(void)
#ifdef CONFIG_WAVPACK_DECODER
register_avcodec(&wavpack_decoder);
#endif //CONFIG_WAVPACK_DECODER
+#ifdef CONFIG_TARGA_DECODER
+ register_avcodec(&targa_decoder);
+#endif //CONFIG_TARGA_DECODER
#if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED)
#ifdef CONFIG_AMR_NB_DECODER
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 5123732..933c461 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -37,8 +37,8 @@ extern "C" {
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
-#define LIBAVCODEC_VERSION_INT ((51<<16)+(16<<8)+0)
-#define LIBAVCODEC_VERSION 51.16.0
+#define LIBAVCODEC_VERSION_INT ((51<<16)+(17<<8)+0)
+#define LIBAVCODEC_VERSION 51.17.0
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
@@ -144,6 +144,7 @@ enum CodecID {
CODEC_ID_VP5,
CODEC_ID_VP6,
CODEC_ID_VP6F,
+ CODEC_ID_TARGA,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
@@ -2292,6 +2293,7 @@ extern AVCodec flashsv_decoder;
extern AVCodec cavs_decoder;
extern AVCodec vmnc_decoder;
extern AVCodec wavpack_decoder;
+extern AVCodec targa_decoder;
/* pcm codecs */
#define PCM_CODEC(id, name) \
diff --git a/libavcodec/targa.c b/libavcodec/targa.c
new file mode 100644
index 0000000..4f83bb6
--- /dev/null
+++ b/libavcodec/targa.c
@@ -0,0 +1,244 @@
+/*
+ * Targa (.tga) image decoder
+ * Copyright (c) 2006 Konstantin Shishkov
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+#include "avcodec.h"
+
+enum TargaCompr{
+ TGA_NODATA = 0, // no image data
+ TGA_PAL = 1, // palettized
+ TGA_RGB = 2, // true-color
+ TGA_BW = 3, // black & white or grayscale
+ TGA_RLE = 8, // flag pointing that data is RLE-coded
+};
+
+typedef struct TargaContext {
+ AVFrame picture;
+
+ int width, height;
+ int bpp;
+ int color_type;
+ int compression_type;
+} TargaContext;
+
+static void targa_decode_rle(AVCodecContext *avctx, TargaContext *s, uint8_t *src, uint8_t *dst, int w, int h, int stride, int bpp)
+{
+ int i, x, y;
+ int depth = (bpp + 1) >> 3;
+ int type, count;
+ int diff;
+
+ diff = stride - w * depth;
+ x = y = 0;
+ while(y < h){
+ type = *src++;
+ count = (type & 0x7F) + 1;
+ type &= 0x80;
+ if((x + count > w) && (x + count + 1 > (h - y) * w)){
+ av_log(avctx, AV_LOG_ERROR, "Packet went out of bounds: position (%i,%i) size %i\n", x, y, count);
+ return;
+ }
+ for(i = 0; i < count; i++){
+ switch(depth){
+ case 1:
+ *dst = *src;
+ break;
+ case 2:
+ *((uint16_t*)dst) = LE_16(src);
+ break;
+ case 3:
+ dst[0] = src[0];
+ dst[1] = src[1];
+ dst[2] = src[2];
+ break;
+ }
+ dst += depth;
+ if(!type)
+ src += depth;
+
+ x++;
+ if(x == w){
+ x = 0;
+ y++;
+ dst += diff;
+ }
+ }
+ if(type)
+ src += depth;
+ }
+}
+
+static int decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ TargaContext * const s = avctx->priv_data;
+ AVFrame *picture = data;
+ AVFrame * const p= (AVFrame*)&s->picture;
+ uint8_t *dst;
+ int stride;
+ int idlen, pal, compr, x, y, w, h, bpp, flags;
+ int first_clr, colors, csize;
+
+ /* parse image header */
+ idlen = *buf++;
+ pal = *buf++;
+ compr = *buf++;
+ first_clr = LE_16(buf); buf += 2;
+ colors = LE_16(buf); buf += 2;
+ csize = *buf++;
+ x = LE_16(buf); buf += 2;
+ y = LE_16(buf); buf += 2;
+ w = LE_16(buf); buf += 2;
+ h = LE_16(buf); buf += 2;
+ bpp = *buf++;
+ flags = *buf++;
+ //skip identifier if any
+ buf += idlen;
+ s->bpp = bpp;
+ s->width = w;
+ s->height = h;
+ switch(s->bpp){
+ case 8:
+ avctx->pix_fmt = ((compr & (~TGA_RLE)) == TGA_BW) ? PIX_FMT_GRAY8 : PIX_FMT_PAL8;
+ break;
+ case 15:
+ avctx->pix_fmt = PIX_FMT_RGB555;
+ break;
+ case 16:
+ avctx->pix_fmt = PIX_FMT_RGB555;
+ break;
+ case 24:
+ avctx->pix_fmt = PIX_FMT_BGR24;
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Bit depth %i is not supported\n", avctx->bits_per_sample);
+ return -1;
+ }
+
+ if(s->picture.data[0])
+ avctx->release_buffer(avctx, &s->picture);
+
+ if(avcodec_check_dimensions(avctx, w, h))
+ return -1;
+ if(w != avctx->width || h != avctx->height)
+ avcodec_set_dimensions(avctx, w, h);
+ if(avctx->get_buffer(avctx, p) < 0){
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+ if(flags & 0x20){
+ dst = p->data[0];
+ stride = p->linesize[0];
+ }else{ //image is upside-down
+ dst = p->data[0] + p->linesize[0] * (h - 1);
+ stride = -p->linesize[0];
+ }
+
+ if(avctx->pix_fmt == PIX_FMT_PAL8 && avctx->palctrl){
+ memcpy(p->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
+ if(avctx->palctrl->palette_changed){
+ p->palette_has_changed = 1;
+ avctx->palctrl->palette_changed = 0;
+ }
+ }
+ if(colors){
+ if((colors + first_clr) > 256){
+ av_log(avctx, AV_LOG_ERROR, "Incorrect palette: %i colors with offset %i\n", colors, first_clr);
+ return -1;
+ }
+ if(csize != 24){
+ av_log(avctx, AV_LOG_ERROR, "Palette entry size %i bits is not supported\n", csize);
+ return -1;
+ }
+ if(avctx->pix_fmt != PIX_FMT_PAL8)//should not occur but skip palette anyway
+ buf += colors * ((csize + 1) >> 3);
+ else{
+ int r, g, b, t;
+ int32_t *pal = ((int32_t*)p->data[1]) + first_clr;
+ for(t = 0; t < colors; t++){
+ r = *buf++;
+ g = *buf++;
+ b = *buf++;
+ *pal++ = (b << 16) | (g << 8) | r;
+ }
+ p->palette_has_changed = 1;
+ avctx->palctrl->palette_changed = 0;
+ }
+ }
+ if((compr & (~TGA_RLE)) == TGA_NODATA)
+ memset(p->data[0], 0, p->linesize[0] * s->height);
+ else{
+ if(compr & TGA_RLE)
+ targa_decode_rle(avctx, s, buf, dst, avctx->width, avctx->height, stride, bpp);
+ else{
+ for(y = 0; y < s->height; y++){
+#ifdef WORDS_BIGENDIAN
+ if((s->bpp + 1) >> 3 == 2){
+ uint16_t *dst16 = (uint16_t*)dst;
+ for(x = 0; x < s->width; x++)
+ dst16[x] = LE_16(buf + x * 2);
+ }else
+#endif
+ memcpy(dst, buf, s->width * ((s->bpp + 1) >> 3));
+
+ dst += stride;
+ buf += s->width * ((s->bpp + 1) >> 3);
+ }
+ }
+ }
+
+ *picture= *(AVFrame*)&s->picture;
+ *data_size = sizeof(AVPicture);
+
+ return buf_size;
+}
+
+static int targa_init(AVCodecContext *avctx){
+ TargaContext *s = avctx->priv_data;
+
+ avcodec_get_frame_defaults((AVFrame*)&s->picture);
+ avctx->coded_frame= (AVFrame*)&s->picture;
+ s->picture.data[0] = NULL;
+
+ return 0;
+}
+
+static int targa_end(AVCodecContext *avctx){
+ TargaContext *s = avctx->priv_data;
+
+ if(s->picture.data[0])
+ avctx->release_buffer(avctx, &s->picture);
+
+ return 0;
+}
+
+AVCodec targa_decoder = {
+ "targa",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_TARGA,
+ sizeof(TargaContext),
+ targa_init,
+ NULL,
+ targa_end,
+ decode_frame,
+ 0,
+ NULL
+};
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 18e1ab9..edeaa9f 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -117,6 +117,7 @@ static const CodecTag mov_video_tags[] = {
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */
{ CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */
//{ CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
+ { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
{ CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
{ CODEC_ID_NONE, 0 },
};
--
Libav/FFmpeg packaging
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