Lines Matching refs:mp
54 MotionPixelsContext *mp = avctx->priv_data;
57 mp->avctx = avctx;
58 dsputil_init(&mp->dsp, avctx);
59 mp->changes_map = av_mallocz(avctx->width * avctx->height);
60 mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
61 mp->vpt = av_mallocz(avctx->height * sizeof(YuvPixel));
62 mp->hpt = av_mallocz(avctx->height * avctx->width / 16 * sizeof(YuvPixel));
67 static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
73 offset = get_bits_long(gb, mp->offset_bits_len);
78 x = offset % mp->avctx->width;
79 y = offset / mp->avctx->width;
80 if (y >= mp->avctx->height)
82 w = FFMIN(w, mp->avctx->width - x);
83 h = FFMIN(h, mp->avctx->height - y);
84 pixels = (uint16_t *)&mp->frame.data[0][y * mp->frame.linesize[0] + x * 2];
86 mp->changes_map[offset] = w;
90 offset += mp->avctx->width;
91 pixels += mp->frame.linesize[0] / 2;
96 static void mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size, int code)
100 if (size > mp->max_codes_bits) {
101 av_log(mp->avctx, AV_LOG_ERROR, "invalid code size %d/%d\n", size, mp->max_codes_bits);
105 mp_get_code(mp, gb, size, code + 1);
107 if (mp->current_codes_count >= MAX_HUFF_CODES) {
108 av_log(mp->avctx, AV_LOG_ERROR, "too many codes\n");
111 mp->codes[mp->current_codes_count ].code = code;
112 mp->codes[mp->current_codes_count++].size = size;
115 static void mp_read_codes_table(MotionPixelsContext *mp, GetBitContext *gb)
117 if (mp->codes_count == 1) {
118 mp->codes[0].delta = get_bits(gb, 4);
122 mp->max_codes_bits = get_bits(gb, 4);
123 for (i = 0; i < mp->codes_count; ++i)
124 mp->codes[i].delta = get_bits(gb, 4);
125 mp->current_codes_count = 0;
126 mp_get_code(mp, gb, 0, 0);
130 static int mp_gradient(MotionPixelsContext *mp, int component, int v)
134 delta = (v - 7) * mp->gradient_scale[component];
135 mp->gradient_scale[component] = (v == 0 || v == 14) ? 2 : 1;
139 static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
143 color = *(uint16_t *)&mp->frame.data[0][y * mp->frame.linesize[0] + x * 2];
147 static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
152 *(uint16_t *)&mp->frame.data[0][y * mp->frame.linesize[0] + x * 2] = color;
155 static int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
159 i = (mp->codes_count == 1) ? 0 : get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1);
160 return mp->codes[i].delta;
163 static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
166 const int y0 = y * mp->avctx->width;
169 p = mp->vpt[y];
170 if (mp->changes_map[y0 + x] == 0) {
171 memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
174 while (x < mp->avctx->width) {
175 w = mp->changes_map[y0 + x];
178 if (mp->changes_map[y0 + x + mp->avctx->width] < w ||
179 mp->changes_map[y0 + x + mp->avctx->width * 2] < w ||
180 mp->changes_map[y0 + x + mp->avctx->width * 3] < w) {
182 mp->hpt[((y / 4) * mp->avctx->width + i) / 4] = mp_get_yuv_from_rgb(mp, i, y);
187 memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
188 p = mp_get_yuv_from_rgb(mp, x - 1, y);
190 p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
193 p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
194 p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
195 mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p;
197 p.v = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].v;
198 p.u = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].u;
201 mp_set_rgb_from_yuv(mp, x, y, &p);
207 static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
212 for (y = 0; y < mp->avctx->height; ++y) {
213 if (mp->changes_map[y * mp->avctx->width] != 0) {
214 memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
215 p = mp_get_yuv_from_rgb(mp, 0, y);
217 p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
219 p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
220 p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
222 mp->vpt[y] = p;
223 mp_set_rgb_from_yuv(mp, 0, y, &p);
227 for (y = y0; y < mp->avctx->height; y += 2)
228 mp_decode_line(mp, gb, y);
237 MotionPixelsContext *mp = avctx->priv_data;
241 mp->frame.reference = 1;
242 mp->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
243 if (avctx->reget_buffer(avctx, &mp->frame)) {
249 av_fast_malloc(&mp->bswapbuf, &mp->bswapbuf_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
250 if (!mp->bswapbuf)
252 mp->dsp.bswap_buf((uint32_t *)mp->bswapbuf, (const uint32_t *)buf, buf_size / 4);
254 memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
255 init_get_bits(&gb, mp->bswapbuf, buf_size * 8);
257 memset(mp->changes_map, 0, avctx->width * avctx->height);
261 mp_read_changes_map(mp, &gb, count1, 8, i);
262 mp_read_changes_map(mp, &gb, count2, 4, i);
265 mp->codes_count = get_bits(&gb, 4);
266 if (mp->codes_count == 0)
269 if (mp->changes_map[0] == 0) {
270 *(uint16_t *)mp->frame.data[0] = get_bits(&gb, 15);
271 mp->changes_map[0] = 1;
273 mp_read_codes_table(mp, &gb);
281 init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0);
282 mp_decode_frame_helper(mp, &gb);
283 free_vlc(&mp->vlc);
287 *(AVFrame *)data = mp->frame;
293 MotionPixelsContext *mp = avctx->priv_data;
295 av_freep(&mp->changes_map);
296 av_freep(&mp->vpt);
297 av_freep(&mp->hpt);
298 av_freep(&mp->bswapbuf);
299 if (mp->frame.data[0])
300 avctx->release_buffer(avctx, &mp->frame);