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
23 #include "bytestream.h"
28 static int pnm_decode_frame(AVCodecContext *avctx, void *data,
29 int *data_size, AVPacket *avpkt)
31 const uint8_t *buf = avpkt->data;
32 int buf_size = avpkt->size;
33 PNMContext * const s = avctx->priv_data;
34 AVFrame *picture = data;
35 AVFrame * const p = (AVFrame*)&s->picture;
36 int i, j, n, linesize, h, upgrade = 0;
38 int components, sample_len;
42 s->bytestream_end = buf + buf_size;
44 if (ff_pnm_decode_header(avctx, s) < 0)
48 avctx->release_buffer(avctx, p);
51 if (avctx->get_buffer(avctx, p) < 0) {
52 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
55 p->pict_type = FF_I_TYPE;
58 switch (avctx->pix_fmt) {
78 case PIX_FMT_GRAY16BE:
79 case PIX_FMT_GRAY16LE:
83 if (s->maxval < 65535)
86 case PIX_FMT_MONOWHITE:
87 case PIX_FMT_MONOBLACK:
88 n = (avctx->width + 7) >> 3;
93 linesize = p->linesize[0];
94 if (s->bytestream + n * avctx->height > s->bytestream_end)
97 for (i=0; i<avctx->height; i++) {
99 init_put_bits(&pb, ptr, linesize);
100 for(j=0; j<avctx->width * components; j++){
103 while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
105 if(s->bytestream >= s->bytestream_end)
109 c= (*s->bytestream++) - '0';
111 put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
117 for (i = 0; i < avctx->height; i++) {
119 memcpy(ptr, s->bytestream, n);
120 else if (upgrade == 1) {
121 unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
122 for (j = 0; j < n; j++)
123 ptr[j] = (s->bytestream[j] * f + 64) >> 7;
124 } else if (upgrade == 2) {
125 unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval;
126 for (j = 0; j < n / 2; j++) {
127 v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
128 ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
136 case PIX_FMT_YUV420P:
138 unsigned char *ptr1, *ptr2;
142 linesize = p->linesize[0];
143 if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
145 for (i = 0; i < avctx->height; i++) {
146 memcpy(ptr, s->bytestream, n);
153 h = avctx->height >> 1;
154 for (i = 0; i < h; i++) {
155 memcpy(ptr1, s->bytestream, n);
157 memcpy(ptr2, s->bytestream, n);
159 ptr1 += p->linesize[1];
160 ptr2 += p->linesize[2];
166 linesize = p->linesize[0];
167 if (s->bytestream + avctx->width * avctx->height * 4 > s->bytestream_end)
169 for (i = 0; i < avctx->height; i++) {
172 for (j = 0; j < avctx->width; j++) {
173 r = *s->bytestream++;
174 g = *s->bytestream++;
175 b = *s->bytestream++;
176 a = *s->bytestream++;
177 ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
183 *picture = *(AVFrame*)&s->picture;
184 *data_size = sizeof(AVPicture);
186 return s->bytestream - s->bytestream_start;
190 #if CONFIG_PGM_DECODER
191 AVCodec pgm_decoder = {
201 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE},
203 .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
207 #if CONFIG_PGMYUV_DECODER
208 AVCodec pgmyuv_decoder = {
218 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
220 .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
224 #if CONFIG_PPM_DECODER
225 AVCodec ppm_decoder = {
235 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE},
237 .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
241 #if CONFIG_PBM_DECODER
242 AVCodec pbm_decoder = {
252 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE},
254 .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
258 #if CONFIG_PAM_DECODER
259 AVCodec pam_decoder = {
269 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
271 .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),