262 lines
7.2 KiB
C
262 lines
7.2 KiB
C
/*
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* PNM 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 "avcodec.h"
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#include "bytestream.h"
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#include "pnm.h"
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static int pnm_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
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int buf_size, void *data)
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{
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PNMContext *s = avctx->priv_data;
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AVFrame *pict = data;
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AVFrame * const p = (AVFrame*)&s->picture;
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int i, h, h1, c, n, linesize;
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uint8_t *ptr, *ptr1, *ptr2;
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if (buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200) {
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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*p = *pict;
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p->pict_type = FF_I_TYPE;
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p->key_frame = 1;
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s->bytestream_start =
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s->bytestream = outbuf;
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s->bytestream_end = outbuf + buf_size;
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h = avctx->height;
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h1 = h;
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switch (avctx->pix_fmt) {
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case PIX_FMT_MONOWHITE:
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c = '4';
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n = (avctx->width + 7) >> 3;
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break;
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case PIX_FMT_GRAY8:
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c = '5';
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n = avctx->width;
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break;
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case PIX_FMT_GRAY16BE:
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c = '5';
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n = avctx->width * 2;
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break;
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case PIX_FMT_RGB24:
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c = '6';
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n = avctx->width * 3;
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break;
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case PIX_FMT_RGB48BE:
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c = '6';
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n = avctx->width * 6;
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break;
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case PIX_FMT_YUV420P:
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c = '5';
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n = avctx->width;
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h1 = (h * 3) / 2;
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break;
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default:
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return -1;
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}
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snprintf(s->bytestream, s->bytestream_end - s->bytestream,
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"P%c\n%d %d\n", c, avctx->width, h1);
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s->bytestream += strlen(s->bytestream);
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if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
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snprintf(s->bytestream, s->bytestream_end - s->bytestream,
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"%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE && avctx->pix_fmt != PIX_FMT_RGB48BE) ? 255 : 65535);
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s->bytestream += strlen(s->bytestream);
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}
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ptr = p->data[0];
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linesize = p->linesize[0];
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for (i = 0; i < h; i++) {
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memcpy(s->bytestream, ptr, n);
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s->bytestream += n;
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ptr += linesize;
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}
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if (avctx->pix_fmt == PIX_FMT_YUV420P) {
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h >>= 1;
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n >>= 1;
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ptr1 = p->data[1];
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ptr2 = p->data[2];
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for (i = 0; i < h; i++) {
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memcpy(s->bytestream, ptr1, n);
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s->bytestream += n;
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memcpy(s->bytestream, ptr2, n);
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s->bytestream += n;
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ptr1 += p->linesize[1];
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ptr2 += p->linesize[2];
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}
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}
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return s->bytestream - s->bytestream_start;
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}
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static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
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int buf_size, void *data)
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{
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PNMContext *s = avctx->priv_data;
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AVFrame *pict = data;
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AVFrame * const p = (AVFrame*)&s->picture;
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int i, h, w, n, linesize, depth, maxval;
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const char *tuple_type;
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uint8_t *ptr;
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if (buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200) {
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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*p = *pict;
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p->pict_type = FF_I_TYPE;
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p->key_frame = 1;
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s->bytestream_start =
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s->bytestream = outbuf;
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s->bytestream_end = outbuf+buf_size;
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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 PIX_FMT_MONOWHITE:
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n = (w + 7) >> 3;
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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 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 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 PIX_FMT_RGB32:
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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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default:
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return -1;
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}
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snprintf(s->bytestream, s->bytestream_end - s->bytestream,
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"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
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w, h, depth, maxval, tuple_type);
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s->bytestream += strlen(s->bytestream);
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ptr = p->data[0];
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linesize = p->linesize[0];
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if (avctx->pix_fmt == PIX_FMT_RGB32) {
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int j;
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unsigned int v;
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for (i = 0; i < h; i++) {
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for (j = 0; j < w; j++) {
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v = ((uint32_t *)ptr)[j];
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bytestream_put_be24(&s->bytestream, v);
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*s->bytestream++ = v >> 24;
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}
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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(s->bytestream, ptr, n);
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s->bytestream += n;
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ptr += linesize;
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}
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}
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return s->bytestream - s->bytestream_start;
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}
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#if CONFIG_PGM_ENCODER
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AVCodec pgm_encoder = {
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"pgm",
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CODEC_TYPE_VIDEO,
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CODEC_ID_PGM,
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sizeof(PNMContext),
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ff_pnm_init,
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pnm_encode_frame,
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.pix_fmts = (const enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
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};
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#endif
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#if CONFIG_PGMYUV_ENCODER
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AVCodec pgmyuv_encoder = {
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"pgmyuv",
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CODEC_TYPE_VIDEO,
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CODEC_ID_PGMYUV,
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sizeof(PNMContext),
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ff_pnm_init,
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pnm_encode_frame,
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.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
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};
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#endif
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#if CONFIG_PPM_ENCODER
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AVCodec ppm_encoder = {
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"ppm",
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CODEC_TYPE_VIDEO,
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CODEC_ID_PPM,
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sizeof(PNMContext),
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ff_pnm_init,
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pnm_encode_frame,
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.pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
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};
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#endif
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#if CONFIG_PBM_ENCODER
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AVCodec pbm_encoder = {
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"pbm",
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CODEC_TYPE_VIDEO,
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CODEC_ID_PBM,
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sizeof(PNMContext),
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ff_pnm_init,
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pnm_encode_frame,
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.pix_fmts = (const enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
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};
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#endif
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#if CONFIG_PAM_ENCODER
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AVCodec pam_encoder = {
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"pam",
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CODEC_TYPE_VIDEO,
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CODEC_ID_PAM,
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sizeof(PNMContext),
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ff_pnm_init,
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pam_encode_frame,
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.pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
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};
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#endif
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