3 * Copyright (c) 2002, 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
27 static void samplecpy(uint8_t *dst, const uint8_t *src, int n, int maxval)
33 for (i=0; i<n/2; i++) {
34 ((uint16_t *)dst)[i] = AV_RB16(src+2*i);
39 static int pnm_decode_frame(AVCodecContext *avctx, void *data,
40 int *got_frame, AVPacket *avpkt)
42 const uint8_t *buf = avpkt->data;
43 int buf_size = avpkt->size;
44 PNMContext * const s = avctx->priv_data;
45 AVFrame * const p = data;
46 int i, j, k, n, linesize, h, upgrade = 0, is_mono = 0;
48 int components, sample_len, ret;
51 s->bytestream = (uint8_t *)buf;
52 s->bytestream_end = (uint8_t *)buf + buf_size;
54 if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
57 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
59 p->pict_type = AV_PICTURE_TYPE_I;
61 avctx->bits_per_raw_sample = av_log2(s->maxval) + 1;
63 switch (avctx->pix_fmt) {
65 return AVERROR(EINVAL);
66 case AV_PIX_FMT_RGBA64:
70 if (s->maxval < 65535)
73 case AV_PIX_FMT_RGB48:
77 if (s->maxval < 65535)
85 case AV_PIX_FMT_RGB24:
92 case AV_PIX_FMT_GRAY8:
99 case AV_PIX_FMT_GRAY8A:
100 n = avctx->width * 2;
104 case AV_PIX_FMT_GRAY16:
105 n = avctx->width * 2;
108 if (s->maxval < 65535)
111 case AV_PIX_FMT_YA16:
112 n = avctx->width * 4;
115 if (s->maxval < 65535)
118 case AV_PIX_FMT_MONOWHITE:
119 case AV_PIX_FMT_MONOBLACK:
120 n = (avctx->width + 7) >> 3;
126 linesize = p->linesize[0];
127 if (n * avctx->height > s->bytestream_end - s->bytestream)
128 return AVERROR_INVALIDDATA;
129 if(s->type < 4 || (is_mono && s->type==7)){
130 for (i=0; i<avctx->height; i++) {
132 init_put_bits(&pb, ptr, linesize);
133 for(j=0; j<avctx->width * components; j++){
137 while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
139 if(s->bytestream >= s->bytestream_end)
140 return AVERROR_INVALIDDATA;
142 /* read a single digit */
143 v = (*s->bytestream++)&1;
145 /* read a sequence of digits */
146 for (k = 0; k < 5 && c <= 9; k += 1) {
148 c = (*s->bytestream++) - '0';
151 av_log(avctx, AV_LOG_ERROR, "value %d larger than maxval %d\n", v, s->maxval);
152 return AVERROR_INVALIDDATA;
155 if (sample_len == 16) {
156 ((uint16_t*)ptr)[j] = (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval;
158 put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
160 if (sample_len != 16)
165 for (i = 0; i < avctx->height; i++) {
167 samplecpy(ptr, s->bytestream, n, s->maxval);
168 else if (upgrade == 1) {
169 unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
170 for (j = 0; j < n; j++)
171 ptr[j] = (s->bytestream[j] * f + 64) >> 7;
172 } else if (upgrade == 2) {
173 unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval;
174 for (j = 0; j < n / 2; j++) {
175 v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
176 ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
184 case AV_PIX_FMT_YUV420P:
185 case AV_PIX_FMT_YUV420P9:
186 case AV_PIX_FMT_YUV420P10:
188 unsigned char *ptr1, *ptr2;
192 linesize = p->linesize[0];
193 if (s->maxval >= 256)
195 if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
196 return AVERROR_INVALIDDATA;
197 for (i = 0; i < avctx->height; i++) {
198 samplecpy(ptr, s->bytestream, n, s->maxval);
205 h = avctx->height >> 1;
206 for (i = 0; i < h; i++) {
207 samplecpy(ptr1, s->bytestream, n, s->maxval);
209 samplecpy(ptr2, s->bytestream, n, s->maxval);
211 ptr1 += p->linesize[1];
212 ptr2 += p->linesize[2];
216 case AV_PIX_FMT_YUV420P16:
218 uint16_t *ptr1, *ptr2;
219 const int f = (65535 * 32768 + s->maxval / 2) / s->maxval;
222 n = avctx->width * 2;
224 linesize = p->linesize[0];
225 if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
226 return AVERROR_INVALIDDATA;
227 for (i = 0; i < avctx->height; i++) {
228 for (j = 0; j < n / 2; j++) {
229 v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
230 ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
235 ptr1 = (uint16_t*)p->data[1];
236 ptr2 = (uint16_t*)p->data[2];
238 h = avctx->height >> 1;
239 for (i = 0; i < h; i++) {
240 for (j = 0; j < n / 2; j++) {
241 v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
242 ptr1[j] = (v * f + 16384) >> 15;
246 for (j = 0; j < n / 2; j++) {
247 v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
248 ptr2[j] = (v * f + 16384) >> 15;
252 ptr1 += p->linesize[1] / 2;
253 ptr2 += p->linesize[2] / 2;
260 return s->bytestream - s->bytestream_start;
264 #if CONFIG_PGM_DECODER
265 AVCodec ff_pgm_decoder = {
267 .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
268 .type = AVMEDIA_TYPE_VIDEO,
269 .id = AV_CODEC_ID_PGM,
270 .priv_data_size = sizeof(PNMContext),
271 .decode = pnm_decode_frame,
272 .capabilities = AV_CODEC_CAP_DR1,
276 #if CONFIG_PGMYUV_DECODER
277 AVCodec ff_pgmyuv_decoder = {
279 .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
280 .type = AVMEDIA_TYPE_VIDEO,
281 .id = AV_CODEC_ID_PGMYUV,
282 .priv_data_size = sizeof(PNMContext),
283 .decode = pnm_decode_frame,
284 .capabilities = AV_CODEC_CAP_DR1,
288 #if CONFIG_PPM_DECODER
289 AVCodec ff_ppm_decoder = {
291 .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
292 .type = AVMEDIA_TYPE_VIDEO,
293 .id = AV_CODEC_ID_PPM,
294 .priv_data_size = sizeof(PNMContext),
295 .decode = pnm_decode_frame,
296 .capabilities = AV_CODEC_CAP_DR1,
300 #if CONFIG_PBM_DECODER
301 AVCodec ff_pbm_decoder = {
303 .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
304 .type = AVMEDIA_TYPE_VIDEO,
305 .id = AV_CODEC_ID_PBM,
306 .priv_data_size = sizeof(PNMContext),
307 .decode = pnm_decode_frame,
308 .capabilities = AV_CODEC_CAP_DR1,
312 #if CONFIG_PAM_DECODER
313 AVCodec ff_pam_decoder = {
315 .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
316 .type = AVMEDIA_TYPE_VIDEO,
317 .id = AV_CODEC_ID_PAM,
318 .priv_data_size = sizeof(PNMContext),
319 .decode = pnm_decode_frame,
320 .capabilities = AV_CODEC_CAP_DR1,