FFmpeg: libavfilter/vf_transpose.c Source File

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libavfilter

vf_transpose.c

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1 /*

4 *

5 * This file is part of FFmpeg.

6 *

7 * FFmpeg is free software; you can redistribute it and/or

8 * modify it under the terms of the GNU Lesser General Public

9 * License as published by the Free Software Foundation; either

10 * version 2.1 of the License, or (at your option) any later version.

11 *

12 * FFmpeg is distributed in the hope that it will be useful,

13 * but WITHOUT ANY WARRANTY; without even the implied warranty of

14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

15 * Lesser General Public License for more details.

16 *

17 * You should have received a copy of the GNU Lesser General Public

18 * License along with FFmpeg; if not, write to the Free Software

19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

20 */

22 /**

23 * @file

24 * transposition filter

25 * Based on MPlayer libmpcodecs/vf_rotate.c.

26 */

28 #include <stdio.h>

30 #include "libavutil/imgutils.h"

31 #include "libavutil/internal.h"

32 #include "libavutil/intreadwrite.h"

33 #include "libavutil/opt.h"

34 #include "libavutil/pixdesc.h"

36 #include "avfilter.h"

37 #include "formats.h"

38 #include "internal.h"

39 #include "video.h"

41 typedef enum {

42 TRANSPOSE_PT_TYPE_NONE,

43 TRANSPOSE_PT_TYPE_LANDSCAPE,

44 TRANSPOSE_PT_TYPE_PORTRAIT,

45 } PassthroughType;

47 enum TransposeDir {

48 TRANSPOSE_CCLOCK_FLIP,

49 TRANSPOSE_CLOCK,

50 TRANSPOSE_CCLOCK,

51 TRANSPOSE_CLOCK_FLIP,

52 };

54 typedef struct TransContext {

55 const AVClass *class;

56 int hsub, vsub;

57 int pixsteps[4];

59 PassthroughType passthrough; ///< landscape passthrough mode enabled

60 enum TransposeDir dir;

61 } TransContext;

63 static int query_formats(AVFilterContext *ctx)

64 {

65 AVFilterFormats *pix_fmts = NULL;

66 int fmt;

68 for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {

69 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);

70 if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||

71 desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||

72 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ||

73 desc->log2_chroma_w != desc->log2_chroma_h))

74 ff_add_format(&pix_fmts, fmt);

75 }

78 ff_set_common_formats(ctx, pix_fmts);

79 return 0;

80 }

82 static int config_props_output(AVFilterLink *outlink)

83 {

84 AVFilterContext *ctx = outlink->src;

85 TransContext *trans = ctx->priv;

86 AVFilterLink *inlink = ctx->inputs[0];

87 const AVPixFmtDescriptor *desc_out = av_pix_fmt_desc_get(outlink->format);

88 const AVPixFmtDescriptor *desc_in = av_pix_fmt_desc_get(inlink->format);

90 if (trans->dir&4) {

91 av_log(ctx, AV_LOG_WARNING,

92 "dir values greater than 3 are deprecated, use the passthrough option instead\n");

93 trans->dir &= 3;

94 trans->passthrough = TRANSPOSE_PT_TYPE_LANDSCAPE;

95 }

97 if ((inlink->w >= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) ||

98 (inlink->w <= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) {

99 av_log(ctx, AV_LOG_VERBOSE,

100 "w:%d h:%d -> w:%d h:%d (passthrough mode)\n",

101 inlink->w, inlink->h, inlink->w, inlink->h);

102 return 0;

103 } else {

104 trans->passthrough = TRANSPOSE_PT_TYPE_NONE;

105 }

106

107 trans->hsub = desc_in->log2_chroma_w;

108 trans->vsub = desc_in->log2_chroma_h;

109

110 av_image_fill_max_pixsteps(trans->pixsteps, NULL, desc_out);

111

112 outlink->w = inlink->h;

113 outlink->h = inlink->w;

114

115 if (inlink->sample_aspect_ratio.num)

116 outlink->sample_aspect_ratio = av_div_q((AVRational) { 1, 1 },

117 inlink->sample_aspect_ratio);

118 else

119 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;

120

121 av_log(ctx, AV_LOG_VERBOSE,

122 "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",

123 inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,

124 trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",

125 trans->dir == 0 || trans->dir == 3);

126 return 0;

127 }

128

129 static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)

130 {

131 TransContext *trans = inlink->dst->priv;

132

133 return trans->passthrough ?

134 ff_null_get_video_buffer (inlink, w, h) :

135 ff_default_get_video_buffer(inlink, w, h);

136 }

137

138 typedef struct ThreadData {

139 AVFrame *in, *out;

140 } ThreadData;

141

142 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr,

143 int nb_jobs)

144 {

145 TransContext *trans = ctx->priv;

146 ThreadData *td = arg;

147 AVFrame *out = td->out;

148 AVFrame *in = td->in;

149 int plane;

150

151 for (plane = 0; out->data[plane]; plane++) {

152 int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;

153 int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;

154 int pixstep = trans->pixsteps[plane];

155 int inh = in->height >> vsub;

156 int outw = FF_CEIL_RSHIFT(out->width, hsub);

157 int outh = FF_CEIL_RSHIFT(out->height, vsub);

158 int start = (outh * jobnr ) / nb_jobs;

159 int end = (outh * (jobnr+1)) / nb_jobs;

160 uint8_t *dst, *src;

161 int dstlinesize, srclinesize;

162 int x, y;

163

164 dstlinesize = out->linesize[plane];

165 dst = out->data[plane] + start * dstlinesize;

166 src = in->data[plane];

167 srclinesize = in->linesize[plane];

168

169 if (trans->dir & 1) {

170 src += in->linesize[plane] * (inh - 1);

171 srclinesize *= -1;

172 }

173

174 if (trans->dir & 2) {

175 dst = out->data[plane] + dstlinesize * (outh - start - 1);

176 dstlinesize *= -1;

177 }

178

179 switch (pixstep) {

180 case 1:

181 for (y = start; y < end; y++, dst += dstlinesize)

182 for (x = 0; x < outw; x++)

183 dst[x] = src[x * srclinesize + y];

184 break;

185 case 2:

186 for (y = start; y < end; y++, dst += dstlinesize) {

187 for (x = 0; x < outw; x++)

188 *((uint16_t *)(dst + 2 * x)) =

189 *((uint16_t *)(src + x * srclinesize + y * 2));

190 }

191 break;

192 case 3:

193 for (y = start; y < end; y++, dst += dstlinesize) {

194 for (x = 0; x < outw; x++) {

195 int32_t v = AV_RB24(src + x * srclinesize + y * 3);

196 AV_WB24(dst + 3 * x, v);

197 }

198 }

199 break;

200 case 4:

201 for (y = start; y < end; y++, dst += dstlinesize) {

202 for (x = 0; x < outw; x++)

203 *((uint32_t *)(dst + 4 * x)) =

204 *((uint32_t *)(src + x * srclinesize + y * 4));

205 }

206 break;

207 case 6:

208 for (y = start; y < end; y++, dst += dstlinesize) {

209 for (x = 0; x < outw; x++) {

210 int64_t v = AV_RB48(src + x * srclinesize + y*6);

211 AV_WB48(dst + 6*x, v);

212 }

213 }

214 break;

215 case 8:

216 for (y = start; y < end; y++, dst += dstlinesize) {

217 for (x = 0; x < outw; x++)

218 *((uint64_t *)(dst + 8*x)) = *((uint64_t *)(src + x * srclinesize + y*8));

219 }

220 break;

221 }

222 }

223

224 return 0;

225 }

226

227 static int filter_frame(AVFilterLink *inlink, AVFrame *in)

228 {

229 AVFilterContext *ctx = inlink->dst;

230 TransContext *trans = ctx->priv;

231 AVFilterLink *outlink = ctx->outputs[0];

232 ThreadData td;

233 AVFrame *out;

234

235 if (trans->passthrough)

236 return ff_filter_frame(outlink, in);

237

238 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);

239 if (!out) {

240 av_frame_free(&in);

241 return AVERROR(ENOMEM);

242 }

243 av_frame_copy_props(out, in);

244

245 if (in->sample_aspect_ratio.num == 0) {

246 out->sample_aspect_ratio = in->sample_aspect_ratio;

247 } else {

248 out->sample_aspect_ratio.num = in->sample_aspect_ratio.den;

249 out->sample_aspect_ratio.den = in->sample_aspect_ratio.num;

250 }

251

252 td.in = in, td.out = out;

253 ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outlink->h, ctx->graph->nb_threads));

254 av_frame_free(&in);

255 return ff_filter_frame(outlink, out);

256 }

257

258 #define OFFSET(x) offsetof(TransContext, x)

259 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

260

261 static const AVOption transpose_options[] = {

262 { "dir", "set transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP }, 0, 7, FLAGS, "dir" },

263 { "cclock_flip", "rotate counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" },

264 { "clock", "rotate clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" },

265 { "cclock", "rotate counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" },

266 { "clock_flip", "rotate clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" },

267

268 { "passthrough", "do not apply transposition if the input matches the specified geometry",

269 OFFSET(passthrough), AV_OPT_TYPE_INT, {.i64=TRANSPOSE_PT_TYPE_NONE}, 0, INT_MAX, FLAGS, "passthrough" },

270 { "none", "always apply transposition", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_NONE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },

271 { "portrait", "preserve portrait geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT}, INT_MIN, INT_MAX, FLAGS, "passthrough" },

272 { "landscape", "preserve landscape geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },

273

274 { NULL }

275 };

276

277 AVFILTER_DEFINE_CLASS(transpose);

278

279 static const AVFilterPad avfilter_vf_transpose_inputs[] = {

280 {

281 .name = "default",

282 .type = AVMEDIA_TYPE_VIDEO,

283 .get_video_buffer = get_video_buffer,

284 .filter_frame = filter_frame,

285 },

286 { NULL }

287 };

288

289 static const AVFilterPad avfilter_vf_transpose_outputs[] = {

290 {

291 .name = "default",

292 .config_props = config_props_output,

293 .type = AVMEDIA_TYPE_VIDEO,

294 },

295 { NULL }

296 };

297

298 AVFilter ff_vf_transpose = {

299 .name = "transpose",

300 .description = NULL_IF_CONFIG_SMALL("Transpose input video."),

301 .priv_size = sizeof(TransContext),

302 .priv_class = &transpose_class,

303 .query_formats = query_formats,

304 .inputs = avfilter_vf_transpose_inputs,

305 .outputs = avfilter_vf_transpose_outputs,

306 .flags = AVFILTER_FLAG_SLICE_THREADS,

307 };

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