diff options
Diffstat (limited to 'ffmpeg/libavcodec/pamenc.c')
| -rw-r--r-- | ffmpeg/libavcodec/pamenc.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/pamenc.c b/ffmpeg/libavcodec/pamenc.c new file mode 100644 index 0000000..3e47278 --- /dev/null +++ b/ffmpeg/libavcodec/pamenc.c @@ -0,0 +1,143 @@ +/* + * 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 "internal.h" +#include "pnm.h" + + +static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt, + const AVFrame *pict, int *got_packet) +{ + PNMContext *s = avctx->priv_data; + AVFrame * const p = &s->picture; + int i, h, w, n, linesize, depth, maxval, ret; + const char *tuple_type; + uint8_t *ptr; + + h = avctx->height; + w = avctx->width; + switch (avctx->pix_fmt) { + case AV_PIX_FMT_MONOBLACK: + n = w; + depth = 1; + maxval = 1; + tuple_type = "BLACKANDWHITE"; + break; + case AV_PIX_FMT_GRAY8: + n = w; + depth = 1; + maxval = 255; + tuple_type = "GRAYSCALE"; + break; + case AV_PIX_FMT_GRAY16BE: + n = w * 2; + depth = 1; + maxval = 0xFFFF; + tuple_type = "GRAYSCALE"; + break; + case AV_PIX_FMT_GRAY8A: + n = w * 2; + depth = 2; + maxval = 255; + tuple_type = "GRAYSCALE_ALPHA"; + break; + case AV_PIX_FMT_RGB24: + n = w * 3; + depth = 3; + maxval = 255; + tuple_type = "RGB"; + break; + case AV_PIX_FMT_RGBA: + n = w * 4; + depth = 4; + maxval = 255; + tuple_type = "RGB_ALPHA"; + break; + case AV_PIX_FMT_RGB48BE: + n = w * 6; + depth = 3; + maxval = 0xFFFF; + tuple_type = "RGB"; + break; + case AV_PIX_FMT_RGBA64BE: + n = w * 8; + depth = 4; + maxval = 0xFFFF; + tuple_type = "RGB_ALPHA"; + break; + default: + return -1; + } + + if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200)) < 0) + return ret; + + *p = *pict; + p->pict_type = AV_PICTURE_TYPE_I; + p->key_frame = 1; + + s->bytestream_start = + s->bytestream = pkt->data; + s->bytestream_end = pkt->data + pkt->size; + + snprintf(s->bytestream, s->bytestream_end - s->bytestream, + "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %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 == AV_PIX_FMT_MONOBLACK){ + int j; + for (i = 0; i < h; i++) { + for (j = 0; j < w; j++) + *s->bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1; + ptr += linesize; + } + } else { + for (i = 0; i < h; i++) { + memcpy(s->bytestream, ptr, n); + s->bytestream += n; + ptr += linesize; + } + } + + pkt->size = s->bytestream - s->bytestream_start; + pkt->flags |= AV_PKT_FLAG_KEY; + *got_packet = 1; + return 0; +} + + +AVCodec ff_pam_encoder = { + .name = "pam", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_PAM, + .priv_data_size = sizeof(PNMContext), + .init = ff_pnm_init, + .encode2 = pam_encode_frame, + .pix_fmts = (const enum AVPixelFormat[]){ + AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE + }, + .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"), +}; |