| /* |
| * 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 "avcodec.h" |
| #include "bytestream.h" |
| #include "pnm.h" |
| |
| |
| static av_cold int common_init(AVCodecContext *avctx){ |
| PNMContext *s = avctx->priv_data; |
| |
| avcodec_get_frame_defaults((AVFrame*)&s->picture); |
| avctx->coded_frame= (AVFrame*)&s->picture; |
| |
| return 0; |
| } |
| |
| static int pnm_decode_frame(AVCodecContext *avctx, |
| void *data, int *data_size, |
| const uint8_t *buf, int buf_size) |
| { |
| PNMContext * const s = avctx->priv_data; |
| AVFrame *picture = data; |
| AVFrame * const p= (AVFrame*)&s->picture; |
| int i, n, linesize, h, upgrade = 0; |
| unsigned char *ptr; |
| |
| s->bytestream_start= |
| s->bytestream= buf; |
| s->bytestream_end= buf + buf_size; |
| |
| if(ff_pnm_decode_header(avctx, s) < 0) |
| return -1; |
| |
| if(p->data[0]) |
| avctx->release_buffer(avctx, p); |
| |
| p->reference= 0; |
| if(avctx->get_buffer(avctx, p) < 0){ |
| av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
| return -1; |
| } |
| p->pict_type= FF_I_TYPE; |
| p->key_frame= 1; |
| |
| switch(avctx->pix_fmt) { |
| default: |
| return -1; |
| case PIX_FMT_RGB48BE: |
| n = avctx->width * 6; |
| goto do_read; |
| case PIX_FMT_RGB24: |
| n = avctx->width * 3; |
| goto do_read; |
| case PIX_FMT_GRAY8: |
| n = avctx->width; |
| if (s->maxval < 255) |
| upgrade = 1; |
| goto do_read; |
| case PIX_FMT_GRAY16BE: |
| case PIX_FMT_GRAY16LE: |
| n = avctx->width * 2; |
| if (s->maxval < 65535) |
| upgrade = 2; |
| goto do_read; |
| case PIX_FMT_MONOWHITE: |
| case PIX_FMT_MONOBLACK: |
| n = (avctx->width + 7) >> 3; |
| do_read: |
| ptr = p->data[0]; |
| linesize = p->linesize[0]; |
| if(s->bytestream + n*avctx->height > s->bytestream_end) |
| return -1; |
| for(i = 0; i < avctx->height; i++) { |
| if (!upgrade) |
| memcpy(ptr, s->bytestream, n); |
| else if (upgrade == 1) { |
| unsigned int j, f = (255*128 + s->maxval/2) / s->maxval; |
| for (j=0; j<n; j++) |
| ptr[j] = (s->bytestream[j] * f + 64) >> 7; |
| } else if (upgrade == 2) { |
| unsigned int j, v, f = (65535*32768 + s->maxval/2) / s->maxval; |
| for (j=0; j<n/2; j++) { |
| v = be2me_16(((uint16_t *)s->bytestream)[j]); |
| ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15; |
| } |
| } |
| s->bytestream += n; |
| ptr += linesize; |
| } |
| break; |
| case PIX_FMT_YUV420P: |
| { |
| unsigned char *ptr1, *ptr2; |
| |
| n = avctx->width; |
| ptr = p->data[0]; |
| linesize = p->linesize[0]; |
| if(s->bytestream + n*avctx->height*3/2 > s->bytestream_end) |
| return -1; |
| for(i = 0; i < avctx->height; i++) { |
| memcpy(ptr, s->bytestream, n); |
| s->bytestream += n; |
| ptr += linesize; |
| } |
| ptr1 = p->data[1]; |
| ptr2 = p->data[2]; |
| n >>= 1; |
| h = avctx->height >> 1; |
| for(i = 0; i < h; i++) { |
| memcpy(ptr1, s->bytestream, n); |
| s->bytestream += n; |
| memcpy(ptr2, s->bytestream, n); |
| s->bytestream += n; |
| ptr1 += p->linesize[1]; |
| ptr2 += p->linesize[2]; |
| } |
| } |
| break; |
| case PIX_FMT_RGB32: |
| ptr = p->data[0]; |
| linesize = p->linesize[0]; |
| if(s->bytestream + avctx->width*avctx->height*4 > s->bytestream_end) |
| return -1; |
| for(i = 0; i < avctx->height; i++) { |
| int j, r, g, b, a; |
| |
| for(j = 0;j < avctx->width; j++) { |
| r = *s->bytestream++; |
| g = *s->bytestream++; |
| b = *s->bytestream++; |
| a = *s->bytestream++; |
| ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b; |
| } |
| ptr += linesize; |
| } |
| break; |
| } |
| *picture= *(AVFrame*)&s->picture; |
| *data_size = sizeof(AVPicture); |
| |
| return s->bytestream - s->bytestream_start; |
| } |
| |
| static int pnm_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){ |
| PNMContext *s = avctx->priv_data; |
| AVFrame *pict = data; |
| AVFrame * const p= (AVFrame*)&s->picture; |
| int i, h, h1, c, n, linesize; |
| uint8_t *ptr, *ptr1, *ptr2; |
| |
| if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){ |
| av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
| return -1; |
| } |
| |
| *p = *pict; |
| p->pict_type= FF_I_TYPE; |
| p->key_frame= 1; |
| |
| s->bytestream_start= |
| s->bytestream= outbuf; |
| s->bytestream_end= outbuf+buf_size; |
| |
| h = avctx->height; |
| h1 = h; |
| switch(avctx->pix_fmt) { |
| case PIX_FMT_MONOWHITE: |
| c = '4'; |
| n = (avctx->width + 7) >> 3; |
| break; |
| case PIX_FMT_GRAY8: |
| c = '5'; |
| n = avctx->width; |
| break; |
| case PIX_FMT_GRAY16BE: |
| c = '5'; |
| n = avctx->width * 2; |
| break; |
| case PIX_FMT_RGB24: |
| c = '6'; |
| n = avctx->width * 3; |
| break; |
| case PIX_FMT_RGB48BE: |
| c = '6'; |
| n = avctx->width * 6; |
| break; |
| case PIX_FMT_YUV420P: |
| c = '5'; |
| n = avctx->width; |
| h1 = (h * 3) / 2; |
| break; |
| default: |
| return -1; |
| } |
| snprintf(s->bytestream, s->bytestream_end - s->bytestream, |
| "P%c\n%d %d\n", |
| c, avctx->width, h1); |
| s->bytestream += strlen(s->bytestream); |
| if (avctx->pix_fmt != PIX_FMT_MONOWHITE) { |
| snprintf(s->bytestream, s->bytestream_end - s->bytestream, |
| "%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE && avctx->pix_fmt != PIX_FMT_RGB48BE) ? 255 : 65535); |
| s->bytestream += strlen(s->bytestream); |
| } |
| |
| ptr = p->data[0]; |
| linesize = p->linesize[0]; |
| for(i=0;i<h;i++) { |
| memcpy(s->bytestream, ptr, n); |
| s->bytestream += n; |
| ptr += linesize; |
| } |
| |
| if (avctx->pix_fmt == PIX_FMT_YUV420P) { |
| h >>= 1; |
| n >>= 1; |
| ptr1 = p->data[1]; |
| ptr2 = p->data[2]; |
| for(i=0;i<h;i++) { |
| memcpy(s->bytestream, ptr1, n); |
| s->bytestream += n; |
| memcpy(s->bytestream, ptr2, n); |
| s->bytestream += n; |
| ptr1 += p->linesize[1]; |
| ptr2 += p->linesize[2]; |
| } |
| } |
| return s->bytestream - s->bytestream_start; |
| } |
| |
| static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){ |
| PNMContext *s = avctx->priv_data; |
| AVFrame *pict = data; |
| AVFrame * const p= (AVFrame*)&s->picture; |
| int i, h, w, n, linesize, depth, maxval; |
| const char *tuple_type; |
| uint8_t *ptr; |
| |
| if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){ |
| av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
| return -1; |
| } |
| |
| *p = *pict; |
| p->pict_type= FF_I_TYPE; |
| p->key_frame= 1; |
| |
| s->bytestream_start= |
| s->bytestream= outbuf; |
| s->bytestream_end= outbuf+buf_size; |
| |
| h = avctx->height; |
| w = avctx->width; |
| switch(avctx->pix_fmt) { |
| case PIX_FMT_MONOWHITE: |
| n = (w + 7) >> 3; |
| depth = 1; |
| maxval = 1; |
| tuple_type = "BLACKANDWHITE"; |
| break; |
| case PIX_FMT_GRAY8: |
| n = w; |
| depth = 1; |
| maxval = 255; |
| tuple_type = "GRAYSCALE"; |
| break; |
| case PIX_FMT_RGB24: |
| n = w * 3; |
| depth = 3; |
| maxval = 255; |
| tuple_type = "RGB"; |
| break; |
| case PIX_FMT_RGB32: |
| n = w * 4; |
| depth = 4; |
| maxval = 255; |
| tuple_type = "RGB_ALPHA"; |
| break; |
| default: |
| return -1; |
| } |
| snprintf(s->bytestream, s->bytestream_end - s->bytestream, |
| "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n", |
| w, h, depth, maxval, tuple_type); |
| s->bytestream += strlen(s->bytestream); |
| |
| ptr = p->data[0]; |
| linesize = p->linesize[0]; |
| |
| if (avctx->pix_fmt == PIX_FMT_RGB32) { |
| int j; |
| unsigned int v; |
| |
| for(i=0;i<h;i++) { |
| for(j=0;j<w;j++) { |
| v = ((uint32_t *)ptr)[j]; |
| bytestream_put_be24(&s->bytestream, v); |
| *s->bytestream++ = v >> 24; |
| } |
| ptr += linesize; |
| } |
| } else { |
| for(i=0;i<h;i++) { |
| memcpy(s->bytestream, ptr, n); |
| s->bytestream += n; |
| ptr += linesize; |
| } |
| } |
| return s->bytestream - s->bytestream_start; |
| } |
| |
| #if 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; |
| } |
| #endif |
| |
| |
| #if CONFIG_PGM_DECODER |
| AVCodec pgm_decoder = { |
| "pgm", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PGM, |
| sizeof(PNMContext), |
| common_init, |
| NULL, |
| NULL, |
| pnm_decode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), |
| }; |
| #endif |
| |
| #if CONFIG_PGM_ENCODER |
| AVCodec pgm_encoder = { |
| "pgm", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PGM, |
| sizeof(PNMContext), |
| common_init, |
| pnm_encode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), |
| }; |
| #endif // CONFIG_PGM_ENCODER |
| |
| #if CONFIG_PGMYUV_DECODER |
| AVCodec pgmyuv_decoder = { |
| "pgmyuv", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PGMYUV, |
| sizeof(PNMContext), |
| common_init, |
| NULL, |
| NULL, |
| pnm_decode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), |
| }; |
| #endif |
| |
| #if CONFIG_PGMYUV_ENCODER |
| AVCodec pgmyuv_encoder = { |
| "pgmyuv", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PGMYUV, |
| sizeof(PNMContext), |
| common_init, |
| pnm_encode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), |
| }; |
| #endif // CONFIG_PGMYUV_ENCODER |
| |
| #if CONFIG_PPM_DECODER |
| AVCodec ppm_decoder = { |
| "ppm", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PPM, |
| sizeof(PNMContext), |
| common_init, |
| NULL, |
| NULL, |
| pnm_decode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), |
| }; |
| #endif |
| |
| #if CONFIG_PPM_ENCODER |
| AVCodec ppm_encoder = { |
| "ppm", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PPM, |
| sizeof(PNMContext), |
| common_init, |
| pnm_encode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), |
| }; |
| #endif // CONFIG_PPM_ENCODER |
| |
| #if CONFIG_PBM_DECODER |
| AVCodec pbm_decoder = { |
| "pbm", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PBM, |
| sizeof(PNMContext), |
| common_init, |
| NULL, |
| NULL, |
| pnm_decode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), |
| }; |
| #endif |
| |
| #if CONFIG_PBM_ENCODER |
| AVCodec pbm_encoder = { |
| "pbm", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PBM, |
| sizeof(PNMContext), |
| common_init, |
| pnm_encode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), |
| }; |
| #endif // CONFIG_PBM_ENCODER |
| |
| #if CONFIG_PAM_DECODER |
| AVCodec pam_decoder = { |
| "pam", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PAM, |
| sizeof(PNMContext), |
| common_init, |
| NULL, |
| NULL, |
| pnm_decode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"), |
| }; |
| #endif |
| |
| #if CONFIG_PAM_ENCODER |
| AVCodec pam_encoder = { |
| "pam", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_PAM, |
| sizeof(PNMContext), |
| common_init, |
| pam_encode_frame, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"), |
| }; |
| #endif // CONFIG_PAM_ENCODER |
