[FFmpeg-devel] [PATCH] Add XPM decoder

Paras paraschadha18 at gmail.com
Fri Mar 10 21:04:18 EET 2017


From: Paras Chadha <paraschadha18 at gmail.com>

Signed-off-by: Paras <paraschadha18 at gmail.com>
---
 Changelog               |   1 +
 doc/general.texi        |   2 +
 libavcodec/Makefile     |   1 +
 libavcodec/allcodecs.c  |   1 +
 libavcodec/avcodec.h    |   1 +
 libavcodec/codec_desc.c |   7 +
 libavcodec/version.h    |   4 +-
 libavcodec/xpmdec.c     | 409 ++++++++++++++++++++++++++++++++++++++++++++++++
 libavformat/img2.c      |   1 +
 9 files changed, 425 insertions(+), 2 deletions(-)
 create mode 100644 libavcodec/xpmdec.c

diff --git a/Changelog b/Changelog
index 13628ca..716b6ff 100644
--- a/Changelog
+++ b/Changelog
@@ -26,6 +26,7 @@ version <next>:
 - native Opus encoder
 - ScreenPressor decoder
 - incomplete ClearVideo decoder
+- XPM decoder
 
 version 3.2:
 - libopenmpt demuxer
diff --git a/doc/general.texi b/doc/general.texi
index 30450c0..83f54b3 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -607,6 +607,8 @@ following image formats are supported:
     @tab WebP image format, encoding supported through external library libwebp
 @item XBM  @tab X @tab X
     @tab X BitMap image format
+ at item XPM  @tab X @tab X
+    @tab X PixMap image format
 @item XFace @tab X @tab X
     @tab X-Face image format
 @item XWD  @tab X @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 65ccbad..fc5fa1f 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -645,6 +645,7 @@ OBJS-$(CONFIG_XAN_WC4_DECODER)         += xxan.o
 OBJS-$(CONFIG_XBIN_DECODER)            += bintext.o cga_data.o
 OBJS-$(CONFIG_XBM_DECODER)             += xbmdec.o
 OBJS-$(CONFIG_XBM_ENCODER)             += xbmenc.o
+OBJS-$(CONFIG_XPM_DECODER)             += xpmdec.o
 OBJS-$(CONFIG_XFACE_DECODER)           += xfacedec.o xface.o
 OBJS-$(CONFIG_XFACE_ENCODER)           += xfaceenc.o xface.o
 OBJS-$(CONFIG_XL_DECODER)              += xl.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 074efd4..81208b2 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -376,6 +376,7 @@ static void register_all(void)
     REGISTER_DECODER(XAN_WC3,           xan_wc3);
     REGISTER_DECODER(XAN_WC4,           xan_wc4);
     REGISTER_ENCDEC (XBM,               xbm);
+    REGISTER_DECODER (XPM,               xpm);
     REGISTER_ENCDEC (XFACE,             xface);
     REGISTER_DECODER(XL,                xl);
     REGISTER_ENCDEC (XWD,               xwd);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 30ac236..a862716 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -377,6 +377,7 @@ enum AVCodecID {
     AV_CODEC_ID_XWD,
     AV_CODEC_ID_CDXL,
     AV_CODEC_ID_XBM,
+    AV_CODEC_ID_XPM,
     AV_CODEC_ID_ZEROCODEC,
     AV_CODEC_ID_MSS1,
     AV_CODEC_ID_MSA1,
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 06bcfc3..88cfddb 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -1591,6 +1591,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
     },
     {
+        .id        = AV_CODEC_ID_XPM,
+        .type      = AVMEDIA_TYPE_VIDEO,
+        .name      = "xpm",
+        .long_name = NULL_IF_CONFIG_SMALL("XPM (X PixMap) image"),
+        .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
+    },
+    {
         .id        = AV_CODEC_ID_XWD,
         .type      = AVMEDIA_TYPE_VIDEO,
         .name      = "xwd",
diff --git a/libavcodec/version.h b/libavcodec/version.h
index b00e011..3ed5a71 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,8 +28,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  57
-#define LIBAVCODEC_VERSION_MINOR  82
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MINOR  83
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \
diff --git a/libavcodec/xpmdec.c b/libavcodec/xpmdec.c
new file mode 100644
index 0000000..635f25a
--- /dev/null
+++ b/libavcodec/xpmdec.c
@@ -0,0 +1,409 @@
+/*
+ * XPM image format
+ *
+ * Copyright (c) 2012 Paul B Mahol
+ * Copyright (c) 2016 Paras Chadha
+ *
+ * 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 "libavutil/parseutils.h"
+#include "libavutil/avstring.h"
+#include "avcodec.h"
+#include "internal.h"
+
+typedef struct XPMContext {
+    uint32_t  *pixels;
+    int      pixels_size;
+} XPMDecContext;
+
+typedef struct ColorEntry {
+    const char *name;            ///< a string representing the name of the color
+    uint8_t     rgb_color[3];    ///< RGB values for the color
+} ColorEntry;
+
+static int color_table_compare(const void *lhs, const void *rhs)
+{
+    return av_strcasecmp(lhs, ((const ColorEntry *)rhs)->name);
+}
+
+static const ColorEntry color_table[] = {
+    { "AliceBlue",            { 0xF0, 0xF8, 0xFF } },
+    { "AntiqueWhite",         { 0xFA, 0xEB, 0xD7 } },
+    { "Aqua",                 { 0x00, 0xFF, 0xFF } },
+    { "Aquamarine",           { 0x7F, 0xFF, 0xD4 } },
+    { "Azure",                { 0xF0, 0xFF, 0xFF } },
+    { "Beige",                { 0xF5, 0xF5, 0xDC } },
+    { "Bisque",               { 0xFF, 0xE4, 0xC4 } },
+    { "Black",                { 0x00, 0x00, 0x00 } },
+    { "BlanchedAlmond",       { 0xFF, 0xEB, 0xCD } },
+    { "Blue",                 { 0x00, 0x00, 0xFF } },
+    { "BlueViolet",           { 0x8A, 0x2B, 0xE2 } },
+    { "Brown",                { 0xA5, 0x2A, 0x2A } },
+    { "BurlyWood",            { 0xDE, 0xB8, 0x87 } },
+    { "CadetBlue",            { 0x5F, 0x9E, 0xA0 } },
+    { "Chartreuse",           { 0x7F, 0xFF, 0x00 } },
+    { "Chocolate",            { 0xD2, 0x69, 0x1E } },
+    { "Coral",                { 0xFF, 0x7F, 0x50 } },
+    { "CornflowerBlue",       { 0x64, 0x95, 0xED } },
+    { "Cornsilk",             { 0xFF, 0xF8, 0xDC } },
+    { "Crimson",              { 0xDC, 0x14, 0x3C } },
+    { "Cyan",                 { 0x00, 0xFF, 0xFF } },
+    { "DarkBlue",             { 0x00, 0x00, 0x8B } },
+    { "DarkCyan",             { 0x00, 0x8B, 0x8B } },
+    { "DarkGoldenRod",        { 0xB8, 0x86, 0x0B } },
+    { "DarkGray",             { 0xA9, 0xA9, 0xA9 } },
+    { "DarkGreen",            { 0x00, 0x64, 0x00 } },
+    { "DarkKhaki",            { 0xBD, 0xB7, 0x6B } },
+    { "DarkMagenta",          { 0x8B, 0x00, 0x8B } },
+    { "DarkOliveGreen",       { 0x55, 0x6B, 0x2F } },
+    { "Darkorange",           { 0xFF, 0x8C, 0x00 } },
+    { "DarkOrchid",           { 0x99, 0x32, 0xCC } },
+    { "DarkRed",              { 0x8B, 0x00, 0x00 } },
+    { "DarkSalmon",           { 0xE9, 0x96, 0x7A } },
+    { "DarkSeaGreen",         { 0x8F, 0xBC, 0x8F } },
+    { "DarkSlateBlue",        { 0x48, 0x3D, 0x8B } },
+    { "DarkSlateGray",        { 0x2F, 0x4F, 0x4F } },
+    { "DarkTurquoise",        { 0x00, 0xCE, 0xD1 } },
+    { "DarkViolet",           { 0x94, 0x00, 0xD3 } },
+    { "DeepPink",             { 0xFF, 0x14, 0x93 } },
+    { "DeepSkyBlue",          { 0x00, 0xBF, 0xFF } },
+    { "DimGray",              { 0x69, 0x69, 0x69 } },
+    { "DodgerBlue",           { 0x1E, 0x90, 0xFF } },
+    { "FireBrick",            { 0xB2, 0x22, 0x22 } },
+    { "FloralWhite",          { 0xFF, 0xFA, 0xF0 } },
+    { "ForestGreen",          { 0x22, 0x8B, 0x22 } },
+    { "Fuchsia",              { 0xFF, 0x00, 0xFF } },
+    { "Gainsboro",            { 0xDC, 0xDC, 0xDC } },
+    { "GhostWhite",           { 0xF8, 0xF8, 0xFF } },
+    { "Gold",                 { 0xFF, 0xD7, 0x00 } },
+    { "GoldenRod",            { 0xDA, 0xA5, 0x20 } },
+    { "Gray",                 { 0x80, 0x80, 0x80 } },
+    { "Green",                { 0x00, 0x80, 0x00 } },
+    { "GreenYellow",          { 0xAD, 0xFF, 0x2F } },
+    { "HoneyDew",             { 0xF0, 0xFF, 0xF0 } },
+    { "HotPink",              { 0xFF, 0x69, 0xB4 } },
+    { "IndianRed",            { 0xCD, 0x5C, 0x5C } },
+    { "Indigo",               { 0x4B, 0x00, 0x82 } },
+    { "Ivory",                { 0xFF, 0xFF, 0xF0 } },
+    { "Khaki",                { 0xF0, 0xE6, 0x8C } },
+    { "Lavender",             { 0xE6, 0xE6, 0xFA } },
+    { "LavenderBlush",        { 0xFF, 0xF0, 0xF5 } },
+    { "LawnGreen",            { 0x7C, 0xFC, 0x00 } },
+    { "LemonChiffon",         { 0xFF, 0xFA, 0xCD } },
+    { "LightBlue",            { 0xAD, 0xD8, 0xE6 } },
+    { "LightCoral",           { 0xF0, 0x80, 0x80 } },
+    { "LightCyan",            { 0xE0, 0xFF, 0xFF } },
+    { "LightGoldenRodYellow", { 0xFA, 0xFA, 0xD2 } },
+    { "LightGreen",           { 0x90, 0xEE, 0x90 } },
+    { "LightGrey",            { 0xD3, 0xD3, 0xD3 } },
+    { "LightPink",            { 0xFF, 0xB6, 0xC1 } },
+    { "LightSalmon",          { 0xFF, 0xA0, 0x7A } },
+    { "LightSeaGreen",        { 0x20, 0xB2, 0xAA } },
+    { "LightSkyBlue",         { 0x87, 0xCE, 0xFA } },
+    { "LightSlateGray",       { 0x77, 0x88, 0x99 } },
+    { "LightSteelBlue",       { 0xB0, 0xC4, 0xDE } },
+    { "LightYellow",          { 0xFF, 0xFF, 0xE0 } },
+    { "Lime",                 { 0x00, 0xFF, 0x00 } },
+    { "LimeGreen",            { 0x32, 0xCD, 0x32 } },
+    { "Linen",                { 0xFA, 0xF0, 0xE6 } },
+    { "Magenta",              { 0xFF, 0x00, 0xFF } },
+    { "Maroon",               { 0x80, 0x00, 0x00 } },
+    { "MediumAquaMarine",     { 0x66, 0xCD, 0xAA } },
+    { "MediumBlue",           { 0x00, 0x00, 0xCD } },
+    { "MediumOrchid",         { 0xBA, 0x55, 0xD3 } },
+    { "MediumPurple",         { 0x93, 0x70, 0xD8 } },
+    { "MediumSeaGreen",       { 0x3C, 0xB3, 0x71 } },
+    { "MediumSlateBlue",      { 0x7B, 0x68, 0xEE } },
+    { "MediumSpringGreen",    { 0x00, 0xFA, 0x9A } },
+    { "MediumTurquoise",      { 0x48, 0xD1, 0xCC } },
+    { "MediumVioletRed",      { 0xC7, 0x15, 0x85 } },
+    { "MidnightBlue",         { 0x19, 0x19, 0x70 } },
+    { "MintCream",            { 0xF5, 0xFF, 0xFA } },
+    { "MistyRose",            { 0xFF, 0xE4, 0xE1 } },
+    { "Moccasin",             { 0xFF, 0xE4, 0xB5 } },
+    { "NavajoWhite",          { 0xFF, 0xDE, 0xAD } },
+    { "Navy",                 { 0x00, 0x00, 0x80 } },
+    { "OldLace",              { 0xFD, 0xF5, 0xE6 } },
+    { "Olive",                { 0x80, 0x80, 0x00 } },
+    { "OliveDrab",            { 0x6B, 0x8E, 0x23 } },
+    { "Orange",               { 0xFF, 0xA5, 0x00 } },
+    { "OrangeRed",            { 0xFF, 0x45, 0x00 } },
+    { "Orchid",               { 0xDA, 0x70, 0xD6 } },
+    { "PaleGoldenRod",        { 0xEE, 0xE8, 0xAA } },
+    { "PaleGreen",            { 0x98, 0xFB, 0x98 } },
+    { "PaleTurquoise",        { 0xAF, 0xEE, 0xEE } },
+    { "PaleVioletRed",        { 0xD8, 0x70, 0x93 } },
+    { "PapayaWhip",           { 0xFF, 0xEF, 0xD5 } },
+    { "PeachPuff",            { 0xFF, 0xDA, 0xB9 } },
+    { "Peru",                 { 0xCD, 0x85, 0x3F } },
+    { "Pink",                 { 0xFF, 0xC0, 0xCB } },
+    { "Plum",                 { 0xDD, 0xA0, 0xDD } },
+    { "PowderBlue",           { 0xB0, 0xE0, 0xE6 } },
+    { "Purple",               { 0x80, 0x00, 0x80 } },
+    { "Red",                  { 0xFF, 0x00, 0x00 } },
+    { "RosyBrown",            { 0xBC, 0x8F, 0x8F } },
+    { "RoyalBlue",            { 0x41, 0x69, 0xE1 } },
+    { "SaddleBrown",          { 0x8B, 0x45, 0x13 } },
+    { "Salmon",               { 0xFA, 0x80, 0x72 } },
+    { "SandyBrown",           { 0xF4, 0xA4, 0x60 } },
+    { "SeaGreen",             { 0x2E, 0x8B, 0x57 } },
+    { "SeaShell",             { 0xFF, 0xF5, 0xEE } },
+    { "Sienna",               { 0xA0, 0x52, 0x2D } },
+    { "Silver",               { 0xC0, 0xC0, 0xC0 } },
+    { "SkyBlue",              { 0x87, 0xCE, 0xEB } },
+    { "SlateBlue",            { 0x6A, 0x5A, 0xCD } },
+    { "SlateGray",            { 0x70, 0x80, 0x90 } },
+    { "Snow",                 { 0xFF, 0xFA, 0xFA } },
+    { "SpringGreen",          { 0x00, 0xFF, 0x7F } },
+    { "SteelBlue",            { 0x46, 0x82, 0xB4 } },
+    { "Tan",                  { 0xD2, 0xB4, 0x8C } },
+    { "Teal",                 { 0x00, 0x80, 0x80 } },
+    { "Thistle",              { 0xD8, 0xBF, 0xD8 } },
+    { "Tomato",               { 0xFF, 0x63, 0x47 } },
+    { "Turquoise",            { 0x40, 0xE0, 0xD0 } },
+    { "Violet",               { 0xEE, 0x82, 0xEE } },
+    { "Wheat",                { 0xF5, 0xDE, 0xB3 } },
+    { "White",                { 0xFF, 0xFF, 0xFF } },
+    { "WhiteSmoke",           { 0xF5, 0xF5, 0xF5 } },
+    { "Yellow",               { 0xFF, 0xFF, 0x00 } },
+    { "YellowGreen",          { 0x9A, 0xCD, 0x32 } },
+};
+
+static int convert(uint8_t x)
+{
+    if (x >= 'a')
+        x -= 87;
+    else if (x >= 'A')
+        x -= 55;
+    else
+        x -= '0';
+    return x;
+}
+
+/*
+**  functions same as strcspn but ignores characters in reject if they are inside a C style comment...
+**  @param str, reject - same as that of strcspn 
+**  @return length till any character in reject does not occur in str
+*/
+static size_t mod_strcspn(const char *str, const char *rej){
+    size_t v1, v2;
+    const char * ptr = str;
+    
+    v1 = strcspn(str, "/");
+    v2 = strcspn(str, rej);
+    
+    while(v1<v2){
+        ptr += v1+1;
+        if(*(ptr)=='*'){
+            ptr = strstr(ptr, "*/")+2;
+        }
+        else if(*(ptr)=='/'){
+            ptr = strstr(ptr, "\n")+1;
+        }
+        v1 = strcspn(ptr, "/");
+        v2 = strcspn(ptr, rej);
+    }
+    
+    return (size_t)(ptr-str)+v2;
+}
+
+static uint32_t hexstring_to_rgba(const char *p, int len){
+    uint32_t ret = 0xFF000000;
+    const ColorEntry *entry;
+    char color_name[100];
+
+    if(*p == '#'){
+        p++;
+        len--;
+        if (len == 3) {
+            ret |= (convert(p[2]) <<  4) |
+                   (convert(p[1]) << 12) |
+                   (convert(p[0]) << 20);
+        } else if (len == 4) {
+            ret  = (convert(p[3]) <<  4) |
+                   (convert(p[2]) << 12) |
+                   (convert(p[1]) << 20) |
+                   (convert(p[0]) << 28);
+        } else if (len == 6) {
+            ret |=  convert(p[5])        |
+                   (convert(p[4]) <<  4) |
+                   (convert(p[3]) <<  8) |
+                   (convert(p[2]) << 12) |
+                   (convert(p[1]) << 16) |
+                   (convert(p[0]) << 20);
+        } else if (len == 8) {
+            ret  =  convert(p[7])        |
+                   (convert(p[6]) <<  4) |
+                   (convert(p[5]) <<  8) |
+                   (convert(p[4]) << 12) |
+                   (convert(p[3]) << 16) |
+                   (convert(p[2]) << 20) |
+                   (convert(p[1]) << 24) |
+                   (convert(p[0]) << 28);
+        }
+    }
+    else{
+        strncpy(color_name, p, len);
+        color_name[len] = '\0';
+
+        entry = bsearch(color_name,
+                        color_table,
+                        (sizeof(color_table)/sizeof(color_table[0])),
+                        sizeof(ColorEntry),
+                        color_table_compare);
+        
+        ret |=      entry->rgb_color[2] |
+                   (entry->rgb_color[1] << 8) |
+                   (entry->rgb_color[0] << 16); 
+    }
+    return ret;
+}
+
+static int ascii2index(const uint8_t *cpixel, int cpp)
+{
+    const uint8_t *p = cpixel;
+    int n = 0, m = 1, i;
+
+    for (i = 0; i < cpp; i++) {
+        if (*p < ' ' || *p > '~')
+            return AVERROR_INVALIDDATA;
+        n += (*p++ - ' ') * m;
+        m *= 95;
+    }
+    return n;
+}
+
+static int xpm_decode_frame(AVCodecContext *avctx, void *data,
+                            int *got_frame, AVPacket *avpkt)
+{
+    XPMDecContext *x = avctx->priv_data;
+    AVFrame *p=data;
+    const uint8_t *end, *ptr = avpkt->data;
+    int ncolors, cpp, ret, i, j;
+    int64_t size;
+    uint32_t *dst;
+    
+    avctx->pix_fmt = AV_PIX_FMT_BGRA;
+
+    end = avpkt->data + avpkt->size;
+    if (memcmp(ptr, "/* XPM */", 9)) {
+        av_log(avctx, AV_LOG_ERROR, "missing signature\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    ptr += mod_strcspn(ptr, "\"");
+    if (sscanf(ptr, "\"%u %u %u %u\",",
+               &avctx->width, &avctx->height, &ncolors, &cpp) != 4) {
+        av_log(avctx, AV_LOG_ERROR, "missing image parameters\n");
+        return AVERROR_INVALIDDATA;
+    }
+    
+    if ((ret = ff_set_dimensions(avctx, avctx->width, avctx->height)) < 0)
+        return ret;
+        
+    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
+        return ret;
+
+    if (ncolors <= 0 || cpp <= 0) {
+        av_log(avctx, AV_LOG_ERROR, "invalid number of colors or chars per pixel\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    size = 1;
+    j = 1;
+    for(i=0;i<cpp;i++){
+        size += j*94;
+        j *= 95;
+    }
+        
+    if (size<0) {
+        av_log(avctx, AV_LOG_ERROR, "unsupported number of chars per pixel\n");
+        return AVERROR_PATCHWELCOME;
+    }
+
+    av_fast_padded_malloc(&x->pixels, &x->pixels_size, size);
+    if (!x->pixels)
+        return AVERROR(ENOMEM);
+
+    ptr += mod_strcspn(ptr, ",") + 1;
+    for (i = 0; i < ncolors; i++) {
+        const uint8_t *index;
+        int len;
+
+        ptr += mod_strcspn(ptr, "\"") + 1;
+        if (ptr + cpp > end)
+            return AVERROR_INVALIDDATA;
+        index = ptr;
+        ptr += cpp;
+
+        ptr = strstr(ptr, "c ");
+        if (ptr)
+            ptr += 2;
+        else
+            return AVERROR_INVALIDDATA;
+
+        len = strcspn(ptr, "\" ");
+
+        if ((ret = ascii2index(index, cpp)) < 0)
+            return ret;
+            
+        x->pixels[ret] = hexstring_to_rgba(ptr, len);
+
+        ptr += mod_strcspn(ptr, ",") + 1;
+    }
+
+    for (i = 0; i < avctx->height; i++) {
+        dst = (uint32_t *)(p->data[0] + i * p->linesize[0]);
+        ptr += mod_strcspn(ptr, "\"") + 1;
+        for (j = 0; j < avctx->width; j++) {
+            if (ptr + cpp > end)
+                return AVERROR_INVALIDDATA;
+            ret = ascii2index(ptr, cpp);
+            *dst++ = x->pixels[ret];
+            ptr += cpp;
+        }
+        ptr += mod_strcspn(ptr, ",") + 1;
+    }
+
+    p->key_frame = 1;
+    p->pict_type = AV_PICTURE_TYPE_I;
+
+    *got_frame = 1;
+    *(AVFrame *)data = *p;
+
+    return avpkt->size;
+}
+
+static av_cold int xpm_decode_close(AVCodecContext *avctx)
+{
+    XPMDecContext *x = avctx->priv_data;
+    av_freep(&x->pixels);
+
+    return 0;
+}
+
+AVCodec ff_xpm_decoder = {
+    .name           = "xpm",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_XPM,
+    .priv_data_size = sizeof(XPMDecContext),
+    .close          = xpm_decode_close,
+    .decode         = xpm_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("XPM (X PixMap) image")
+};
diff --git a/libavformat/img2.c b/libavformat/img2.c
index f9f53ff..29df4f0 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -75,6 +75,7 @@ const IdStrMap ff_img_tags[] = {
     { AV_CODEC_ID_V210X,      "yuv10"    },
     { AV_CODEC_ID_WEBP,       "webp"     },
     { AV_CODEC_ID_XBM,        "xbm"      },
+    { AV_CODEC_ID_XPM,        "xpm"      },
     { AV_CODEC_ID_XFACE,      "xface"    },
     { AV_CODEC_ID_XWD,        "xwd"      },
     { AV_CODEC_ID_NONE,       NULL       }
-- 
2.4.11



More information about the ffmpeg-devel mailing list