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00022 #include "libavutil/pixdesc.h"
00023 #include "avfilter.h"
00024
00028 static void merge_ref(AVFilterFormats *ret, AVFilterFormats *a)
00029 {
00030 int i;
00031
00032 for(i = 0; i < a->refcount; i ++) {
00033 ret->refs[ret->refcount] = a->refs[i];
00034 *ret->refs[ret->refcount++] = ret;
00035 }
00036
00037 av_free(a->refs);
00038 av_free(a->formats);
00039 av_free(a);
00040 }
00041
00042 AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
00043 {
00044 AVFilterFormats *ret;
00045 unsigned i, j, k = 0;
00046
00047 ret = av_mallocz(sizeof(AVFilterFormats));
00048
00049
00050 ret->formats = av_malloc(sizeof(*ret->formats) * FFMIN(a->format_count,
00051 b->format_count));
00052 for(i = 0; i < a->format_count; i ++)
00053 for(j = 0; j < b->format_count; j ++)
00054 if(a->formats[i] == b->formats[j])
00055 ret->formats[k++] = a->formats[i];
00056
00057 ret->format_count = k;
00058
00059 if(!ret->format_count) {
00060 av_free(ret->formats);
00061 av_free(ret);
00062 return NULL;
00063 }
00064
00065 ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount));
00066
00067 merge_ref(ret, a);
00068 merge_ref(ret, b);
00069
00070 return ret;
00071 }
00072
00073 AVFilterFormats *avfilter_make_format_list(const enum PixelFormat *pix_fmts)
00074 {
00075 AVFilterFormats *formats;
00076 int count;
00077
00078 for (count = 0; pix_fmts[count] != PIX_FMT_NONE; count++)
00079 ;
00080
00081 formats = av_mallocz(sizeof(AVFilterFormats));
00082 formats->formats = av_malloc(sizeof(*formats->formats) * count);
00083 formats->format_count = count;
00084 memcpy(formats->formats, pix_fmts, sizeof(*formats->formats) * count);
00085
00086 return formats;
00087 }
00088
00089 int avfilter_add_colorspace(AVFilterFormats **avff, enum PixelFormat pix_fmt)
00090 {
00091 enum PixelFormat *pix_fmts;
00092
00093 if (!(*avff) && !(*avff = av_mallocz(sizeof(AVFilterFormats))))
00094 return AVERROR(ENOMEM);
00095
00096 pix_fmts = av_realloc((*avff)->formats,
00097 sizeof((*avff)->formats) * ((*avff)->format_count+1));
00098 if (!pix_fmts)
00099 return AVERROR(ENOMEM);
00100
00101 (*avff)->formats = pix_fmts;
00102 (*avff)->formats[(*avff)->format_count++] = pix_fmt;
00103 return 0;
00104 }
00105
00106 AVFilterFormats *avfilter_all_colorspaces(void)
00107 {
00108 AVFilterFormats *ret = NULL;
00109 enum PixelFormat pix_fmt;
00110
00111 for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
00112 if (!(av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL))
00113 avfilter_add_colorspace(&ret, pix_fmt);
00114
00115 return ret;
00116 }
00117
00118 void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
00119 {
00120 *ref = f;
00121 f->refs = av_realloc(f->refs, sizeof(AVFilterFormats**) * ++f->refcount);
00122 f->refs[f->refcount-1] = ref;
00123 }
00124
00125 static int find_ref_index(AVFilterFormats **ref)
00126 {
00127 int i;
00128 for(i = 0; i < (*ref)->refcount; i ++)
00129 if((*ref)->refs[i] == ref)
00130 return i;
00131 return -1;
00132 }
00133
00134 void avfilter_formats_unref(AVFilterFormats **ref)
00135 {
00136 int idx;
00137
00138 if (!*ref)
00139 return;
00140
00141 idx = find_ref_index(ref);
00142
00143 if(idx >= 0)
00144 memmove((*ref)->refs + idx, (*ref)->refs + idx+1,
00145 sizeof(AVFilterFormats**) * ((*ref)->refcount-idx-1));
00146
00147 if(!--(*ref)->refcount) {
00148 av_free((*ref)->formats);
00149 av_free((*ref)->refs);
00150 av_free(*ref);
00151 }
00152 *ref = NULL;
00153 }
00154
00155 void avfilter_formats_changeref(AVFilterFormats **oldref,
00156 AVFilterFormats **newref)
00157 {
00158 int idx = find_ref_index(oldref);
00159
00160 if(idx >= 0) {
00161 (*oldref)->refs[idx] = newref;
00162 *newref = *oldref;
00163 *oldref = NULL;
00164 }
00165 }
00166