Mark some read-only datastructures as const.

patch by Stefan Huehner, stefan & at & huehner & dot & org

Originally committed as revision 5639 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/dpcm.c

@@ -41,7 +41,7 @@ typedef struct DPCMContext {
     int channels;
     short roq_square_array[256];
     long sample[2];//for SOL_DPCM
-    int *sol_table;//for SOL_DPCM
+    const int *sol_table;//for SOL_DPCM
 } DPCMContext;
 
 #define SATURATE_S16(x)  if (x < -32768) x = -32768; \
@@ -84,15 +84,15 @@ static int interplay_delta_table[] = {
 
 };
 
-static int sol_table_old[16] =
+static const int sol_table_old[16] =
     { 0x0,  0x1,  0x2 , 0x3,  0x6,  0xA,  0xF, 0x15,
     -0x15, -0xF, -0xA, -0x6, -0x3, -0x2, -0x1, 0x0};
 
-static int sol_table_new[16] =
+static const int sol_table_new[16] =
     { 0x0,  0x1,  0x2,  0x3,  0x6,  0xA,  0xF,  0x15,
       0x0, -0x1, -0x2, -0x3, -0x6, -0xA, -0xF, -0x15};
 
-static int sol_table_16[128] = {
+static const int sol_table_16[128] = {
     0x000, 0x008, 0x010, 0x020, 0x030, 0x040, 0x050, 0x060, 0x070, 0x080,
     0x090, 0x0A0, 0x0B0, 0x0C0, 0x0D0, 0x0E0, 0x0F0, 0x100, 0x110, 0x120,
     0x130, 0x140, 0x150, 0x160, 0x170, 0x180, 0x190, 0x1A0, 0x1B0, 0x1C0,

libavcodec/imgconvert.c

@@ -63,7 +63,7 @@ typedef struct PixFmtInfo {
 } PixFmtInfo;
 
 /* this table gives more information about formats */
-static PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
+static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
     /* YUV formats */
     [PIX_FMT_YUV420P] = {
         .name = "yuv420p",
@@ -266,7 +266,7 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
                    int pix_fmt, int width, int height)
 {
     int size, w2, h2, size2;
-    PixFmtInfo *pinfo;
+    const PixFmtInfo *pinfo;
 
     if(avcodec_check_dimensions(NULL, width, height))
         goto fail;
@@ -359,7 +359,7 @@ fail:
 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
                      unsigned char *dest, int dest_size)
 {
-    PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
+    const PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
     int i, j, w, h, data_planes;
     const unsigned char* s;
     int size = avpicture_get_size(pix_fmt, width, height);
@@ -592,7 +592,7 @@ void img_copy(AVPicture *dst, const AVPicture *src,
               int pix_fmt, int width, int height)
 {
     int bwidth, bits, i;
-    PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
+    const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
 
     pf = &pix_fmt_info[pix_fmt];
     switch(pf->pixel_type) {
@@ -1723,7 +1723,7 @@ typedef struct ConvertEntry {
 
    The other conversion functions are just optimisations for common cases.
 */
-static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
+static const ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
     [PIX_FMT_YUV420P] = {
         [PIX_FMT_YUV422] = {
             .convert = yuv420p_to_yuv422,
@@ -1966,7 +1966,7 @@ void avpicture_free(AVPicture *picture)
 }
 
 /* return true if yuv planar */
-static inline int is_yuv_planar(PixFmtInfo *ps)
+static inline int is_yuv_planar(const PixFmtInfo *ps)
 {
     return (ps->color_type == FF_COLOR_YUV ||
             ps->color_type == FF_COLOR_YUV_JPEG) &&
@@ -2055,8 +2055,8 @@ int img_convert(AVPicture *dst, int dst_pix_fmt,
 {
     static int inited;
     int i, ret, dst_width, dst_height, int_pix_fmt;
-    PixFmtInfo *src_pix, *dst_pix;
-    ConvertEntry *ce;
+    const PixFmtInfo *src_pix, *dst_pix;
+    const ConvertEntry *ce;
     AVPicture tmp1, *tmp = &tmp1;
 
     if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||
@@ -2323,7 +2323,7 @@ static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
 int img_get_alpha_info(const AVPicture *src,
                        int pix_fmt, int width, int height)
 {
-    PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
+    const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
     int ret;
 
     pf = &pix_fmt_info[pix_fmt];

libavcodec/utils.c

@@ -450,7 +450,7 @@ static const char* context_to_name(void* ptr) {
 #define E AV_OPT_FLAG_ENCODING_PARAM
 #define D AV_OPT_FLAG_DECODING_PARAM
 
-static AVOption options[]={
+static const AVOption options[]={
 {"bit_rate", NULL, OFFSET(bit_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|A|E},
 {"bit_rate_tolerance", NULL, OFFSET(bit_rate_tolerance), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 {"flags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|A|E|D, "flags"},