mirror of
https://github.com/FFmpeg/FFmpeg.git
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146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/*
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* PAM image format
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* Copyright (c) 2002, 2003 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "encode.h"
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static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *p, int *got_packet)
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{
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int i, h, w, n, linesize, depth, maxval, ret, header_size;
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uint8_t *bytestream;
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const uint8_t *ptr;
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const char *tuple_type;
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char header[100];
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h = avctx->height;
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w = avctx->width;
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_MONOBLACK:
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n = w;
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depth = 1;
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maxval = 1;
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tuple_type = "BLACKANDWHITE";
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break;
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case AV_PIX_FMT_GRAY8:
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n = w;
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depth = 1;
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maxval = 255;
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tuple_type = "GRAYSCALE";
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break;
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case AV_PIX_FMT_GRAY16BE:
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n = w * 2;
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depth = 1;
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maxval = 0xFFFF;
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tuple_type = "GRAYSCALE";
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break;
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case AV_PIX_FMT_GRAY8A:
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n = w * 2;
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depth = 2;
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maxval = 255;
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tuple_type = "GRAYSCALE_ALPHA";
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break;
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case AV_PIX_FMT_YA16BE:
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n = w * 4;
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depth = 2;
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maxval = 0xFFFF;
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tuple_type = "GRAYSCALE_ALPHA";
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break;
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case AV_PIX_FMT_RGB24:
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n = w * 3;
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depth = 3;
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maxval = 255;
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tuple_type = "RGB";
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break;
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case AV_PIX_FMT_RGBA:
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n = w * 4;
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depth = 4;
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maxval = 255;
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tuple_type = "RGB_ALPHA";
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break;
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case AV_PIX_FMT_RGB48BE:
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n = w * 6;
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depth = 3;
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maxval = 0xFFFF;
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tuple_type = "RGB";
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break;
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case AV_PIX_FMT_RGBA64BE:
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n = w * 8;
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depth = 4;
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maxval = 0xFFFF;
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tuple_type = "RGB_ALPHA";
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break;
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default:
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return -1;
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}
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header_size = snprintf(header, sizeof(header),
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"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
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w, h, depth, maxval, tuple_type);
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av_assert1(header_size < sizeof(header));
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if ((ret = ff_get_encode_buffer(avctx, pkt, n*h + header_size, 0)) < 0)
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return ret;
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bytestream = pkt->data;
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memcpy(bytestream, header, header_size);
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bytestream += header_size;
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ptr = p->data[0];
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linesize = p->linesize[0];
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if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){
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int j;
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for (i = 0; i < h; i++) {
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for (j = 0; j < w; j++)
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*bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
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ptr += linesize;
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}
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} else {
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for (i = 0; i < h; i++) {
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memcpy(bytestream, ptr, n);
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bytestream += n;
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ptr += linesize;
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}
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}
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*got_packet = 1;
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return 0;
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}
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const FFCodec ff_pam_encoder = {
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.p.name = "pam",
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CODEC_LONG_NAME("PAM (Portable AnyMap) image"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_PAM,
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.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
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FF_CODEC_ENCODE_CB(pam_encode_frame),
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.p.pix_fmts = (const enum AVPixelFormat[]){
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AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
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AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A,
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AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_YA16BE,
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AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE
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},
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};
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