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00027 #include <string.h>
00028
00029 #include "avfilter.h"
00030 #include "formats.h"
00031 #include "internal.h"
00032 #include "video.h"
00033 #include "libavutil/pixdesc.h"
00034 #include "libavutil/internal.h"
00035 #include "libavutil/intreadwrite.h"
00036 #include "libavutil/imgutils.h"
00037
00038 typedef struct {
00039 int max_step[4];
00040 int hsub, vsub;
00041 } FlipContext;
00042
00043 static int query_formats(AVFilterContext *ctx)
00044 {
00045 static const enum AVPixelFormat pix_fmts[] = {
00046 AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGB48LE,
00047 AV_PIX_FMT_BGR48BE, AV_PIX_FMT_BGR48LE,
00048 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
00049 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
00050 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
00051 AV_PIX_FMT_RGB565BE, AV_PIX_FMT_RGB565LE,
00052 AV_PIX_FMT_RGB555BE, AV_PIX_FMT_RGB555LE,
00053 AV_PIX_FMT_RGB444BE, AV_PIX_FMT_RGB444LE,
00054 AV_PIX_FMT_BGR565BE, AV_PIX_FMT_BGR565LE,
00055 AV_PIX_FMT_BGR555BE, AV_PIX_FMT_BGR555LE,
00056 AV_PIX_FMT_BGR444BE, AV_PIX_FMT_BGR444LE,
00057 AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE,
00058 AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUV420P16BE,
00059 AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUV422P16BE,
00060 AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUV444P16BE,
00061 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
00062 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
00063 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
00064 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
00065 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
00066 AV_PIX_FMT_YUVA420P,
00067 AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8,
00068 AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE,
00069 AV_PIX_FMT_PAL8, AV_PIX_FMT_GRAY8,
00070 AV_PIX_FMT_NONE
00071 };
00072
00073 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
00074 return 0;
00075 }
00076
00077 static int config_props(AVFilterLink *inlink)
00078 {
00079 FlipContext *flip = inlink->dst->priv;
00080 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
00081
00082 av_image_fill_max_pixsteps(flip->max_step, NULL, pix_desc);
00083 flip->hsub = pix_desc->log2_chroma_w;
00084 flip->vsub = pix_desc->log2_chroma_h;
00085
00086 return 0;
00087 }
00088
00089 static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
00090 {
00091 AVFilterContext *ctx = inlink->dst;
00092 FlipContext *flip = ctx->priv;
00093 AVFilterLink *outlink = ctx->outputs[0];
00094 AVFilterBufferRef *out;
00095 uint8_t *inrow, *outrow;
00096 int i, j, plane, step, hsub, vsub;
00097
00098 out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
00099 if (!out) {
00100 avfilter_unref_bufferp(&in);
00101 return AVERROR(ENOMEM);
00102 }
00103 avfilter_copy_buffer_ref_props(out, in);
00104
00105
00106 if (av_pix_fmt_desc_get(inlink->format)->flags & PIX_FMT_PAL)
00107 memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
00108
00109 for (plane = 0; plane < 4 && in->data[plane]; plane++) {
00110 step = flip->max_step[plane];
00111 hsub = (plane == 1 || plane == 2) ? flip->hsub : 0;
00112 vsub = (plane == 1 || plane == 2) ? flip->vsub : 0;
00113
00114 outrow = out->data[plane];
00115 inrow = in ->data[plane] + ((inlink->w >> hsub) - 1) * step;
00116 for (i = 0; i < in->video->h >> vsub; i++) {
00117 switch (step) {
00118 case 1:
00119 for (j = 0; j < (inlink->w >> hsub); j++)
00120 outrow[j] = inrow[-j];
00121 break;
00122
00123 case 2:
00124 {
00125 uint16_t *outrow16 = (uint16_t *)outrow;
00126 uint16_t * inrow16 = (uint16_t *) inrow;
00127 for (j = 0; j < (inlink->w >> hsub); j++)
00128 outrow16[j] = inrow16[-j];
00129 }
00130 break;
00131
00132 case 3:
00133 {
00134 uint8_t *in = inrow;
00135 uint8_t *out = outrow;
00136 for (j = 0; j < (inlink->w >> hsub); j++, out += 3, in -= 3) {
00137 int32_t v = AV_RB24(in);
00138 AV_WB24(out, v);
00139 }
00140 }
00141 break;
00142
00143 case 4:
00144 {
00145 uint32_t *outrow32 = (uint32_t *)outrow;
00146 uint32_t * inrow32 = (uint32_t *) inrow;
00147 for (j = 0; j < (inlink->w >> hsub); j++)
00148 outrow32[j] = inrow32[-j];
00149 }
00150 break;
00151
00152 default:
00153 for (j = 0; j < (inlink->w >> hsub); j++)
00154 memcpy(outrow + j*step, inrow - j*step, step);
00155 }
00156
00157 inrow += in ->linesize[plane];
00158 outrow += out->linesize[plane];
00159 }
00160 }
00161
00162 avfilter_unref_bufferp(&in);
00163 return ff_filter_frame(outlink, out);
00164 }
00165
00166 static const AVFilterPad avfilter_vf_hflip_inputs[] = {
00167 {
00168 .name = "default",
00169 .type = AVMEDIA_TYPE_VIDEO,
00170 .filter_frame = filter_frame,
00171 .config_props = config_props,
00172 .min_perms = AV_PERM_READ,
00173 },
00174 { NULL }
00175 };
00176
00177 static const AVFilterPad avfilter_vf_hflip_outputs[] = {
00178 {
00179 .name = "default",
00180 .type = AVMEDIA_TYPE_VIDEO,
00181 },
00182 { NULL }
00183 };
00184
00185 AVFilter avfilter_vf_hflip = {
00186 .name = "hflip",
00187 .description = NULL_IF_CONFIG_SMALL("Horizontally flip the input video."),
00188 .priv_size = sizeof(FlipContext),
00189 .query_formats = query_formats,
00190
00191 .inputs = avfilter_vf_hflip_inputs,
00192 .outputs = avfilter_vf_hflip_outputs,
00193 };