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00022 #include "libavutil/pixdesc.h"
00023 #include "avfilter.h"
00024 #include "internal.h"
00025
00029 static void merge_ref(AVFilterFormats *ret, AVFilterFormats *a)
00030 {
00031 int i;
00032
00033 for(i = 0; i < a->refcount; i ++) {
00034 ret->refs[ret->refcount] = a->refs[i];
00035 *ret->refs[ret->refcount++] = ret;
00036 }
00037
00038 av_free(a->refs);
00039 av_free(a->formats);
00040 av_free(a);
00041 }
00042
00043 AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
00044 {
00045 AVFilterFormats *ret;
00046 unsigned i, j, k = 0, m_count;
00047
00048 if (a == b)
00049 return a;
00050
00051 ret = av_mallocz(sizeof(AVFilterFormats));
00052
00053
00054 m_count = FFMIN(a->format_count, b->format_count);
00055 if (m_count) {
00056 ret->formats = av_malloc(sizeof(*ret->formats) * m_count);
00057 for(i = 0; i < a->format_count; i ++)
00058 for(j = 0; j < b->format_count; j ++)
00059 if(a->formats[i] == b->formats[j])
00060 ret->formats[k++] = a->formats[i];
00061
00062 ret->format_count = k;
00063 }
00064
00065 if(!ret->format_count) {
00066 av_free(ret->formats);
00067 av_free(ret);
00068 return NULL;
00069 }
00070
00071 ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount));
00072
00073 merge_ref(ret, a);
00074 merge_ref(ret, b);
00075
00076 return ret;
00077 }
00078
00079 int ff_fmt_is_in(int fmt, const int *fmts)
00080 {
00081 const int *p;
00082
00083 for (p = fmts; *p != PIX_FMT_NONE; p++) {
00084 if (fmt == *p)
00085 return 1;
00086 }
00087 return 0;
00088 }
00089
00090 AVFilterFormats *avfilter_make_format_list(const int *fmts)
00091 {
00092 AVFilterFormats *formats;
00093 int count;
00094
00095 for (count = 0; fmts[count] != -1; count++)
00096 ;
00097
00098 formats = av_mallocz(sizeof(AVFilterFormats));
00099 if (count)
00100 formats->formats = av_malloc(sizeof(*formats->formats) * count);
00101 formats->format_count = count;
00102 memcpy(formats->formats, fmts, sizeof(*formats->formats) * count);
00103
00104 return formats;
00105 }
00106
00107 int avfilter_add_format(AVFilterFormats **avff, int fmt)
00108 {
00109 int *fmts;
00110
00111 if (!(*avff) && !(*avff = av_mallocz(sizeof(AVFilterFormats))))
00112 return AVERROR(ENOMEM);
00113
00114 fmts = av_realloc((*avff)->formats,
00115 sizeof(*(*avff)->formats) * ((*avff)->format_count+1));
00116 if (!fmts)
00117 return AVERROR(ENOMEM);
00118
00119 (*avff)->formats = fmts;
00120 (*avff)->formats[(*avff)->format_count++] = fmt;
00121 return 0;
00122 }
00123
00124 AVFilterFormats *avfilter_all_formats(enum AVMediaType type)
00125 {
00126 AVFilterFormats *ret = NULL;
00127 int fmt;
00128 int num_formats = type == AVMEDIA_TYPE_VIDEO ? PIX_FMT_NB :
00129 type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0;
00130
00131 for (fmt = 0; fmt < num_formats; fmt++)
00132 if ((type != AVMEDIA_TYPE_VIDEO) ||
00133 (type == AVMEDIA_TYPE_VIDEO && !(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_HWACCEL)))
00134 avfilter_add_format(&ret, fmt);
00135
00136 return ret;
00137 }
00138
00139 void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
00140 {
00141 *ref = f;
00142 f->refs = av_realloc(f->refs, sizeof(AVFilterFormats**) * ++f->refcount);
00143 f->refs[f->refcount-1] = ref;
00144 }
00145
00146 static int find_ref_index(AVFilterFormats **ref)
00147 {
00148 int i;
00149 for(i = 0; i < (*ref)->refcount; i ++)
00150 if((*ref)->refs[i] == ref)
00151 return i;
00152 return -1;
00153 }
00154
00155 void avfilter_formats_unref(AVFilterFormats **ref)
00156 {
00157 int idx;
00158
00159 if (!*ref)
00160 return;
00161
00162 idx = find_ref_index(ref);
00163
00164 if(idx >= 0)
00165 memmove((*ref)->refs + idx, (*ref)->refs + idx+1,
00166 sizeof(AVFilterFormats**) * ((*ref)->refcount-idx-1));
00167
00168 if(!--(*ref)->refcount) {
00169 av_free((*ref)->formats);
00170 av_free((*ref)->refs);
00171 av_free(*ref);
00172 }
00173 *ref = NULL;
00174 }
00175
00176 void avfilter_formats_changeref(AVFilterFormats **oldref,
00177 AVFilterFormats **newref)
00178 {
00179 int idx = find_ref_index(oldref);
00180
00181 if(idx >= 0) {
00182 (*oldref)->refs[idx] = newref;
00183 *newref = *oldref;
00184 *oldref = NULL;
00185 }
00186 }
00187