/* * PNM image format * Copyright (c) 2002, 2003 Fabrice Bellard. * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avformat.h" static inline int pnm_space(int c) { return (c == ' ' || c == '\n' || c == '\r' || c == '\t'); } static void pnm_get(ByteIOContext *f, char *str, int buf_size) { char *s; int c; /* skip spaces and comments */ for(;;) { c = url_fgetc(f); if (c == '#') { do { c = url_fgetc(f); } while (c != '\n' && c != URL_EOF); } else if (!pnm_space(c)) { break; } } s = str; while (c != URL_EOF && !pnm_space(c)) { if ((s - str) < buf_size - 1) *s++ = c; c = url_fgetc(f); } *s = '\0'; } static int pnm_read1(ByteIOContext *f, int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque, int allow_yuv) { int i, n, linesize, h; char buf1[32]; unsigned char *ptr; AVImageInfo info1, *info = &info1; int ret; pnm_get(f, buf1, sizeof(buf1)); if (!strcmp(buf1, "P4")) { info->pix_fmt = PIX_FMT_MONOWHITE; } else if (!strcmp(buf1, "P5")) { if (allow_yuv) info->pix_fmt = PIX_FMT_YUV420P; else info->pix_fmt = PIX_FMT_GRAY8; } else if (!strcmp(buf1, "P6")) { info->pix_fmt = PIX_FMT_RGB24; } else { return AVERROR_INVALIDDATA; } pnm_get(f, buf1, sizeof(buf1)); info->width = atoi(buf1); if (info->width <= 0) return AVERROR_INVALIDDATA; pnm_get(f, buf1, sizeof(buf1)); info->height = atoi(buf1); if (info->height <= 0) return AVERROR_INVALIDDATA; if (info->pix_fmt != PIX_FMT_MONOWHITE) { pnm_get(f, buf1, sizeof(buf1)); } /* more check if YUV420 */ if (info->pix_fmt == PIX_FMT_YUV420P) { if ((info->width & 1) != 0) return AVERROR_INVALIDDATA; h = (info->height * 2); if ((h % 3) != 0) return AVERROR_INVALIDDATA; h /= 3; info->height = h; } ret = alloc_cb(opaque, info); if (ret) return ret; switch(info->pix_fmt) { default: return AVERROR_INVALIDDATA; case PIX_FMT_RGB24: n = info->width * 3; goto do_read; case PIX_FMT_GRAY8: n = info->width; goto do_read; case PIX_FMT_MONOWHITE: n = (info->width + 7) >> 3; do_read: ptr = info->pict.data[0]; linesize = info->pict.linesize[0]; for(i = 0; i < info->height; i++) { get_buffer(f, ptr, n); ptr += linesize; } break; case PIX_FMT_YUV420P: { unsigned char *ptr1, *ptr2; n = info->width; ptr = info->pict.data[0]; linesize = info->pict.linesize[0]; for(i = 0; i < info->height; i++) { get_buffer(f, ptr, n); ptr += linesize; } ptr1 = info->pict.data[1]; ptr2 = info->pict.data[2]; n >>= 1; h = info->height >> 1; for(i = 0; i < h; i++) { get_buffer(f, ptr1, n); get_buffer(f, ptr2, n); ptr1 += info->pict.linesize[1]; ptr2 += info->pict.linesize[2]; } } break; } return 0; } static int pnm_read(ByteIOContext *f, int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque) { return pnm_read1(f, alloc_cb, opaque, 0); } static int pgmyuv_read(ByteIOContext *f, int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque) { return pnm_read1(f, alloc_cb, opaque, 1); } static int pnm_write(ByteIOContext *pb, AVImageInfo *info) { int i, h, h1, c, n, linesize; char buf[100]; uint8_t *ptr, *ptr1, *ptr2; h = info->height; h1 = h; switch(info->pix_fmt) { case PIX_FMT_MONOWHITE: c = '4'; n = (info->width + 7) >> 3; break; case PIX_FMT_GRAY8: c = '5'; n = info->width; break; case PIX_FMT_RGB24: c = '6'; n = info->width * 3; break; case PIX_FMT_YUV420P: c = '5'; n = info->width; h1 = (h * 3) / 2; break; default: return AVERROR_INVALIDDATA; } snprintf(buf, sizeof(buf), "P%c\n%d %d\n", c, info->width, h1); put_buffer(pb, buf, strlen(buf)); if (info->pix_fmt != PIX_FMT_MONOWHITE) { snprintf(buf, sizeof(buf), "%d\n", 255); put_buffer(pb, buf, strlen(buf)); } ptr = info->pict.data[0]; linesize = info->pict.linesize[0]; for(i=0;i<h;i++) { put_buffer(pb, ptr, n); ptr += linesize; } if (info->pix_fmt == PIX_FMT_YUV420P) { h >>= 1; n >>= 1; ptr1 = info->pict.data[1]; ptr2 = info->pict.data[2]; for(i=0;i<h;i++) { put_buffer(pb, ptr1, n); put_buffer(pb, ptr2, n); ptr1 += info->pict.linesize[1]; ptr2 += info->pict.linesize[2]; } } put_flush_packet(pb); return 0; } static int pam_read(ByteIOContext *f, int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque) { int i, n, linesize, h, w, depth, maxval; char buf1[32], tuple_type[32]; unsigned char *ptr; AVImageInfo info1, *info = &info1; int ret; pnm_get(f, buf1, sizeof(buf1)); if (strcmp(buf1, "P7") != 0) return AVERROR_INVALIDDATA; w = -1; h = -1; maxval = -1; depth = -1; tuple_type[0] = '\0'; for(;;) { pnm_get(f, buf1, sizeof(buf1)); if (!strcmp(buf1, "WIDTH")) { pnm_get(f, buf1, sizeof(buf1)); w = strtol(buf1, NULL, 10); } else if (!strcmp(buf1, "HEIGHT")) { pnm_get(f, buf1, sizeof(buf1)); h = strtol(buf1, NULL, 10); } else if (!strcmp(buf1, "DEPTH")) { pnm_get(f, buf1, sizeof(buf1)); depth = strtol(buf1, NULL, 10); } else if (!strcmp(buf1, "MAXVAL")) { pnm_get(f, buf1, sizeof(buf1)); maxval = strtol(buf1, NULL, 10); } else if (!strcmp(buf1, "TUPLETYPE")) { pnm_get(f, buf1, sizeof(buf1)); pstrcpy(tuple_type, sizeof(tuple_type), buf1); } else if (!strcmp(buf1, "ENDHDR")) { break; } else { return AVERROR_INVALIDDATA; } } /* check that all tags are present */ if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0') return AVERROR_INVALIDDATA; info->width = w; info->height = h; if (depth == 1) { if (maxval == 1) info->pix_fmt = PIX_FMT_MONOWHITE; else info->pix_fmt = PIX_FMT_GRAY8; } else if (depth == 3) { info->pix_fmt = PIX_FMT_RGB24; } else if (depth == 4) { info->pix_fmt = PIX_FMT_RGBA32; } else { return AVERROR_INVALIDDATA; } ret = alloc_cb(opaque, info); if (ret) return ret; switch(info->pix_fmt) { default: return AVERROR_INVALIDDATA; case PIX_FMT_RGB24: n = info->width * 3; goto do_read; case PIX_FMT_GRAY8: n = info->width; goto do_read; case PIX_FMT_MONOWHITE: n = (info->width + 7) >> 3; do_read: ptr = info->pict.data[0]; linesize = info->pict.linesize[0]; for(i = 0; i < info->height; i++) { get_buffer(f, ptr, n); ptr += linesize; } break; case PIX_FMT_RGBA32: ptr = info->pict.data[0]; linesize = info->pict.linesize[0]; for(i = 0; i < info->height; i++) { int j, r, g, b, a; for(j = 0;j < w; j++) { r = get_byte(f); g = get_byte(f); b = get_byte(f); a = get_byte(f); ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b; } ptr += linesize; } break; } return 0; } static int pam_write(ByteIOContext *pb, AVImageInfo *info) { int i, h, w, n, linesize, depth, maxval; const char *tuple_type; char buf[100]; uint8_t *ptr; h = info->height; w = info->width; switch(info->pix_fmt) { case PIX_FMT_MONOWHITE: n = (info->width + 7) >> 3; depth = 1; maxval = 1; tuple_type = "BLACKANDWHITE"; break; case PIX_FMT_GRAY8: n = info->width; depth = 1; maxval = 255; tuple_type = "GRAYSCALE"; break; case PIX_FMT_RGB24: n = info->width * 3; depth = 3; maxval = 255; tuple_type = "RGB"; break; case PIX_FMT_RGBA32: n = info->width * 4; depth = 4; maxval = 255; tuple_type = "RGB_ALPHA"; break; default: return AVERROR_INVALIDDATA; } snprintf(buf, sizeof(buf), "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n", w, h, depth, maxval, tuple_type); put_buffer(pb, buf, strlen(buf)); ptr = info->pict.data[0]; linesize = info->pict.linesize[0]; if (info->pix_fmt == PIX_FMT_RGBA32) { int j; unsigned int v; for(i=0;i<h;i++) { for(j=0;j<w;j++) { v = ((uint32_t *)ptr)[j]; put_byte(pb, (v >> 16) & 0xff); put_byte(pb, (v >> 8) & 0xff); put_byte(pb, (v) & 0xff); put_byte(pb, (v >> 24) & 0xff); } ptr += linesize; } } else { for(i=0;i<h;i++) { put_buffer(pb, ptr, n); ptr += linesize; } } put_flush_packet(pb); return 0; } static int pnm_probe(AVProbeData *pd) { const char *p = pd->buf; if (pd->buf_size >= 8 && p[0] == 'P' && p[1] >= '4' && p[1] <= '6' && pnm_space(p[2]) ) return AVPROBE_SCORE_MAX - 1; /* to permit pgmyuv probe */ else return 0; } static int pgmyuv_probe(AVProbeData *pd) { if (match_ext(pd->filename, "pgmyuv")) return AVPROBE_SCORE_MAX; else return 0; } static int pam_probe(AVProbeData *pd) { const char *p = pd->buf; if (pd->buf_size >= 8 && p[0] == 'P' && p[1] == '7' && p[2] == '\n') return AVPROBE_SCORE_MAX; else return 0; } AVImageFormat pnm_image_format = { "pnm", NULL, pnm_probe, pnm_read, 0, NULL, }; AVImageFormat pbm_image_format = { "pbm", "pbm", NULL, NULL, (1 << PIX_FMT_MONOWHITE), pnm_write, }; AVImageFormat pgm_image_format = { "pgm", "pgm", NULL, NULL, (1 << PIX_FMT_GRAY8), pnm_write, }; AVImageFormat ppm_image_format = { "ppm", "ppm", NULL, NULL, (1 << PIX_FMT_RGB24), pnm_write, }; AVImageFormat pam_image_format = { "pam", "pam", pam_probe, pam_read, (1 << PIX_FMT_MONOWHITE) | (1 << PIX_FMT_GRAY8) | (1 << PIX_FMT_RGB24) | (1 << PIX_FMT_RGBA32), pam_write, }; AVImageFormat pgmyuv_image_format = { "pgmyuv", "pgmyuv", pgmyuv_probe, pgmyuv_read, (1 << PIX_FMT_YUV420P), pnm_write, };