| /* |
| * PAM 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 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 = AV_PICTURE_TYPE_I; |
| 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; |
| } |
| |
| |
| AVCodec ff_pam_encoder = { |
| .name = "pam", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = CODEC_ID_PAM, |
| .priv_data_size = sizeof(PNMContext), |
| .init = ff_pnm_init, |
| .encode = pam_encode_frame, |
| .pix_fmts = (const 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"), |
| }; |