mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-21 08:45:06 +02:00
714 lines
16 KiB
C
714 lines
16 KiB
C
/*
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* Image format
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* Copyright (c) 2000, 2001 Gerard Lantau.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <math.h>
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#include "avformat.h"
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#define IMGFMT_YUV 1
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#define IMGFMT_PGMYUV 2
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#define IMGFMT_PGM 3
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#define IMGFMT_PPM 4
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typedef struct {
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int width;
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int height;
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int img_number;
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int img_size;
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int img_fmt;
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int is_pipe;
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char path[1024];
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} VideoData;
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static inline int pnm_space(int c)
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{
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return (c==' ' || c=='\n' || c=='\r' || c=='\t');
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}
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static void pnm_get(ByteIOContext *f, char *str, int buf_size)
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{
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char *s;
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int c;
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do {
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c=get_byte(f);
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if (c=='#') {
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do {
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c=get_byte(f);
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} while (c!='\n');
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c=get_byte(f);
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}
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} while (pnm_space(c));
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s=str;
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do {
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if (url_feof(f))
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break;
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if ((s - str) < buf_size - 1)
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*s++=c;
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c=get_byte(f);
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} while (!pnm_space(c));
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*s = '\0';
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}
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static int pgm_read(VideoData *s, ByteIOContext *f, UINT8 *buf, int size, int is_yuv)
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{
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int width, height, i;
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char buf1[32];
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UINT8 *picture[3];
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width = s->width;
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height = s->height;
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pnm_get(f, buf1, sizeof(buf1));
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if (strcmp(buf1, "P5")) {
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return -EIO;
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}
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pnm_get(f, buf1, sizeof(buf1));
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pnm_get(f, buf1, sizeof(buf1));
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pnm_get(f, buf1, sizeof(buf1));
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picture[0] = buf;
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picture[1] = buf + width * height;
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picture[2] = buf + width * height + (width * height / 4);
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get_buffer(f, picture[0], width * height);
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height>>=1;
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width>>=1;
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if (is_yuv) {
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for(i=0;i<height;i++) {
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get_buffer(f, picture[1] + i * width, width);
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get_buffer(f, picture[2] + i * width, width);
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}
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} else {
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for(i=0;i<height;i++) {
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memset(picture[1] + i * width, 128, width);
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memset(picture[2] + i * width, 128, width);
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}
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}
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return 0;
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}
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static int ppm_read(VideoData *s, ByteIOContext *f, UINT8 *buf, int size)
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{
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int width, height;
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char buf1[32];
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UINT8 *picture[3];
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width = s->width;
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height = s->height;
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pnm_get(f, buf1, sizeof(buf1));
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if (strcmp(buf1, "P6")) {
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return -EIO;
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}
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pnm_get(f, buf1, sizeof(buf1));
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pnm_get(f, buf1, sizeof(buf1));
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pnm_get(f, buf1, sizeof(buf1));
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picture[0] = buf;
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get_buffer(f, picture[0], width * height*3);
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return 0;
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}
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static int yuv_read(VideoData *s, const char *filename, UINT8 *buf, int size1)
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{
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ByteIOContext pb1, *pb = &pb1;
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char fname[1024], *p;
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int size;
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size = s->width * s->height;
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strcpy(fname, filename);
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p = strrchr(fname, '.');
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if (!p || p[1] != 'Y')
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return -EIO;
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if (url_fopen(pb, fname, URL_RDONLY) < 0)
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return -EIO;
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get_buffer(pb, buf, size);
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url_fclose(pb);
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p[1] = 'U';
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if (url_fopen(pb, fname, URL_RDONLY) < 0)
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return -EIO;
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get_buffer(pb, buf + size, size / 4);
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url_fclose(pb);
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p[1] = 'V';
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if (url_fopen(pb, fname, URL_RDONLY) < 0)
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return -EIO;
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get_buffer(pb, buf + size + (size / 4), size / 4);
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url_fclose(pb);
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return 0;
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}
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int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
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{
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VideoData *s = s1->priv_data;
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char filename[1024];
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int ret;
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ByteIOContext f1, *f;
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snprintf(filename, sizeof(filename), s->path, s->img_number);
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if (!s->is_pipe) {
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f = &f1;
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if (url_fopen(f, filename, URL_RDONLY) < 0)
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return -EIO;
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} else {
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f = &s1->pb;
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if (url_feof(f))
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return -EIO;
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}
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av_new_packet(pkt, s->img_size);
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pkt->stream_index = 0;
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switch(s->img_fmt) {
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case IMGFMT_PGMYUV:
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ret = pgm_read(s, f, pkt->data, pkt->size, 1);
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break;
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case IMGFMT_PGM:
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ret = pgm_read(s, f, pkt->data, pkt->size, 0);
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break;
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case IMGFMT_YUV:
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ret = yuv_read(s, filename, pkt->data, pkt->size);
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break;
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case IMGFMT_PPM:
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ret = ppm_read(s, f, pkt->data, pkt->size);
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break;
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default:
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return -EIO;
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}
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if (!s->is_pipe) {
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url_fclose(f);
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}
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if (ret < 0) {
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av_free_packet(pkt);
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return -EIO; /* signal EOF */
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} else {
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s->img_number++;
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return 0;
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}
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}
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static int sizes[][2] = {
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{ 640, 480 },
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{ 720, 480 },
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{ 720, 576 },
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{ 352, 288 },
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{ 352, 240 },
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{ 160, 128 },
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{ 512, 384 },
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{ 640, 352 },
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};
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static int infer_size(int *width_ptr, int *height_ptr, int size)
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{
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int i;
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for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) {
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if ((sizes[i][0] * sizes[i][1]) == size) {
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*width_ptr = sizes[i][0];
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*height_ptr = sizes[i][1];
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return 0;
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}
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}
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return -1;
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}
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static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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{
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VideoData *s;
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int i, h;
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char buf[1024];
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char buf1[32];
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ByteIOContext pb1, *f = &pb1;
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AVStream *st;
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s = malloc(sizeof(VideoData));
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if (!s)
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return -ENOMEM;
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s1->priv_data = s;
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s1->nb_streams = 1;
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st = av_mallocz(sizeof(AVStream));
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if (!st) {
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free(s);
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return -ENOMEM;
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}
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s1->streams[0] = st;
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strcpy(s->path, s1->filename);
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s->img_number = 0;
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/* find format */
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if (s1->format->flags & AVFMT_NOFILE)
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s->is_pipe = 0;
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else
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s->is_pipe = 1;
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if (s1->format == &pgmyuvpipe_format ||
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s1->format == &pgmyuv_format)
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s->img_fmt = IMGFMT_PGMYUV;
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else if (s1->format == &pgmpipe_format ||
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s1->format == &pgm_format)
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s->img_fmt = IMGFMT_PGM;
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else if (s1->format == &imgyuv_format)
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s->img_fmt = IMGFMT_YUV;
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else if (s1->format == &ppmpipe_format ||
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s1->format == &ppm_format)
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s->img_fmt = IMGFMT_PPM;
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else
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goto fail;
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if (!s->is_pipe) {
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/* try to find the first image */
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for(i=0;i<5;i++) {
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snprintf(buf, sizeof(buf), s->path, s->img_number);
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if (url_fopen(f, buf, URL_RDONLY) >= 0)
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break;
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s->img_number++;
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}
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if (i == 5)
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goto fail;
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} else {
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f = &s1->pb;
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}
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/* find the image size */
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/* XXX: use generic file format guessing, as mpeg */
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switch(s->img_fmt) {
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case IMGFMT_PGM:
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case IMGFMT_PGMYUV:
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case IMGFMT_PPM:
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pnm_get(f, buf1, sizeof(buf1));
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pnm_get(f, buf1, sizeof(buf1));
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s->width = atoi(buf1);
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pnm_get(f, buf1, sizeof(buf1));
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h = atoi(buf1);
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if (s->img_fmt == IMGFMT_PGMYUV)
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h = (h * 2) / 3;
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s->height = h;
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if (s->width <= 0 ||
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s->height <= 0 ||
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(s->width % 2) != 0 ||
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(s->height % 2) != 0) {
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goto fail1;
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}
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break;
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case IMGFMT_YUV:
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/* infer size by using the file size. */
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{
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int img_size;
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URLContext *h;
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/* XXX: hack hack */
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h = url_fileno(f);
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img_size = lseek((int)h->priv_data, 0, SEEK_END);
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if (infer_size(&s->width, &s->height, img_size) < 0) {
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goto fail1;
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}
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}
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break;
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}
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if (!s->is_pipe) {
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url_fclose(f);
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} else {
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url_fseek(f, 0, SEEK_SET);
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}
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st->codec.codec_type = CODEC_TYPE_VIDEO;
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st->codec.codec_id = CODEC_ID_RAWVIDEO;
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st->codec.width = s->width;
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st->codec.height = s->height;
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if (s->img_fmt == IMGFMT_PPM) {
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st->codec.pix_fmt = PIX_FMT_RGB24;
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s->img_size = (s->width * s->height * 3);
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} else {
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st->codec.pix_fmt = PIX_FMT_YUV420P;
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s->img_size = (s->width * s->height * 3) / 2;
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}
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if (!ap || !ap->frame_rate)
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st->codec.frame_rate = 25 * FRAME_RATE_BASE;
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else
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st->codec.frame_rate = ap->frame_rate;
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return 0;
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fail1:
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if (!s->is_pipe)
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url_fclose(f);
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fail:
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free(s);
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return -EIO;
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}
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static int img_read_close(AVFormatContext *s1)
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{
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VideoData *s = s1->priv_data;
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free(s);
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return 0;
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}
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/******************************************************/
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/* image output */
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static int pgm_save(AVPicture *picture, int width, int height, ByteIOContext *pb, int is_yuv)
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{
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int i, h;
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char buf[100];
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UINT8 *ptr, *ptr1, *ptr2;
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h = height;
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if (is_yuv)
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h = (height * 3) / 2;
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snprintf(buf, sizeof(buf),
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"P5\n%d %d\n%d\n",
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width, h, 255);
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put_buffer(pb, buf, strlen(buf));
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ptr = picture->data[0];
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for(i=0;i<height;i++) {
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put_buffer(pb, ptr, width);
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ptr += picture->linesize[0];
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}
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if (is_yuv) {
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height >>= 1;
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width >>= 1;
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ptr1 = picture->data[1];
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ptr2 = picture->data[2];
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for(i=0;i<height;i++) {
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put_buffer(pb, ptr1, width);
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put_buffer(pb, ptr2, width);
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ptr1 += picture->linesize[1];
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ptr2 += picture->linesize[2];
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}
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}
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put_flush_packet(pb);
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return 0;
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}
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static int ppm_save(AVPicture *picture, int width, int height, ByteIOContext *pb)
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{
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int i;
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char buf[100];
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UINT8 *ptr;
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snprintf(buf, sizeof(buf),
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"P6\n%d %d\n%d\n",
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width, height, 255);
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put_buffer(pb, buf, strlen(buf));
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ptr = picture->data[0];
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for(i=0;i<height;i++) {
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put_buffer(pb, ptr, width * 3);
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ptr += picture->linesize[0];
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}
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put_flush_packet(pb);
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return 0;
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}
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static int yuv_save(AVPicture *picture, int width, int height, const char *filename)
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{
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ByteIOContext pb1, *pb = &pb1;
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char fname[1024], *p;
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int i, j;
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UINT8 *ptr;
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static char *ext = "YUV";
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strcpy(fname, filename);
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p = strrchr(fname, '.');
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if (!p || p[1] != 'Y')
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return -EIO;
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for(i=0;i<3;i++) {
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if (i == 1) {
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width >>= 1;
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height >>= 1;
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}
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p[1] = ext[i];
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if (url_fopen(pb, fname, URL_WRONLY) < 0)
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return -EIO;
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ptr = picture->data[i];
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for(j=0;j<height;j++) {
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put_buffer(pb, ptr, width);
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ptr += picture->linesize[i];
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}
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put_flush_packet(pb);
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url_fclose(pb);
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}
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return 0;
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}
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static int img_write_header(AVFormatContext *s)
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{
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VideoData *img;
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img = av_mallocz(sizeof(VideoData));
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if (!img)
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return -1;
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s->priv_data = img;
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img->img_number = 1;
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strcpy(img->path, s->filename);
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/* find format */
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if (s->format->flags & AVFMT_NOFILE)
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img->is_pipe = 0;
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else
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img->is_pipe = 1;
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if (s->format == &pgmyuvpipe_format ||
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s->format == &pgmyuv_format) {
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img->img_fmt = IMGFMT_PGMYUV;
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} else if (s->format == &pgmpipe_format ||
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s->format == &pgm_format) {
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img->img_fmt = IMGFMT_PGM;
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} else if (s->format == &imgyuv_format) {
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img->img_fmt = IMGFMT_YUV;
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} else if (s->format == &ppmpipe_format ||
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s->format == &ppm_format) {
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img->img_fmt = IMGFMT_PPM;
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} else {
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goto fail;
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}
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return 0;
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fail:
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free(img);
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return -EIO;
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}
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static int img_write_packet(AVFormatContext *s, int stream_index,
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UINT8 *buf, int size)
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{
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VideoData *img = s->priv_data;
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AVStream *st = s->streams[stream_index];
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ByteIOContext pb1, *pb;
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AVPicture picture;
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int width, height, ret, size1;
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char filename[1024];
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width = st->codec.width;
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height = st->codec.height;
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switch(st->codec.pix_fmt) {
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case PIX_FMT_YUV420P:
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size1 = (width * height * 3) / 2;
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if (size != size1)
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return -EIO;
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picture.data[0] = buf;
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picture.data[1] = picture.data[0] + width * height;
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picture.data[2] = picture.data[1] + (width * height) / 4;
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picture.linesize[0] = width;
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picture.linesize[1] = width >> 1;
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picture.linesize[2] = width >> 1;
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break;
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case PIX_FMT_RGB24:
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size1 = (width * height * 3);
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if (size != size1)
|
|
return -EIO;
|
|
picture.data[0] = buf;
|
|
picture.linesize[0] = width * 3;
|
|
break;
|
|
default:
|
|
return -EIO;
|
|
}
|
|
|
|
snprintf(filename, sizeof(filename), img->path, img->img_number);
|
|
|
|
if (!img->is_pipe) {
|
|
pb = &pb1;
|
|
if (url_fopen(pb, filename, URL_WRONLY) < 0)
|
|
return -EIO;
|
|
} else {
|
|
pb = &s->pb;
|
|
}
|
|
switch(img->img_fmt) {
|
|
case IMGFMT_PGMYUV:
|
|
ret = pgm_save(&picture, width, height, pb, 1);
|
|
break;
|
|
case IMGFMT_PGM:
|
|
ret = pgm_save(&picture, width, height, pb, 0);
|
|
break;
|
|
case IMGFMT_YUV:
|
|
ret = yuv_save(&picture, width, height, filename);
|
|
break;
|
|
case IMGFMT_PPM:
|
|
ret = ppm_save(&picture, width, height, pb);
|
|
break;
|
|
}
|
|
if (!img->is_pipe) {
|
|
url_fclose(pb);
|
|
}
|
|
|
|
img->img_number++;
|
|
return 0;
|
|
}
|
|
|
|
static int img_write_trailer(AVFormatContext *s)
|
|
{
|
|
VideoData *img = s->priv_data;
|
|
free(img);
|
|
return 0;
|
|
}
|
|
|
|
AVFormat pgm_format = {
|
|
"pgm",
|
|
"pgm image format",
|
|
"",
|
|
"pgm",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
img_write_header,
|
|
img_write_packet,
|
|
img_write_trailer,
|
|
|
|
img_read_header,
|
|
img_read_packet,
|
|
img_read_close,
|
|
NULL,
|
|
AVFMT_NOFILE,
|
|
};
|
|
|
|
AVFormat pgmyuv_format = {
|
|
"pgmyuv",
|
|
"pgm with YUV content image format",
|
|
"",
|
|
"pgm",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
img_write_header,
|
|
img_write_packet,
|
|
img_write_trailer,
|
|
|
|
img_read_header,
|
|
img_read_packet,
|
|
img_read_close,
|
|
NULL,
|
|
AVFMT_NOFILE,
|
|
};
|
|
|
|
AVFormat ppm_format = {
|
|
"ppm",
|
|
"ppm image format",
|
|
"",
|
|
"ppm",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
img_write_header,
|
|
img_write_packet,
|
|
img_write_trailer,
|
|
|
|
img_read_header,
|
|
img_read_packet,
|
|
img_read_close,
|
|
NULL,
|
|
AVFMT_NOFILE,
|
|
};
|
|
|
|
AVFormat imgyuv_format = {
|
|
".Y.U.V",
|
|
".Y.U.V format",
|
|
"",
|
|
"Y",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
img_write_header,
|
|
img_write_packet,
|
|
img_write_trailer,
|
|
|
|
img_read_header,
|
|
img_read_packet,
|
|
img_read_close,
|
|
NULL,
|
|
AVFMT_NOFILE,
|
|
};
|
|
|
|
AVFormat pgmpipe_format = {
|
|
"pgmpipe",
|
|
"PGM pipe format",
|
|
"",
|
|
"pgm",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
img_write_header,
|
|
img_write_packet,
|
|
img_write_trailer,
|
|
|
|
img_read_header,
|
|
img_read_packet,
|
|
img_read_close,
|
|
NULL,
|
|
};
|
|
|
|
AVFormat pgmyuvpipe_format = {
|
|
"pgmyuvpipe",
|
|
"PGM YUV pipe format",
|
|
"",
|
|
"pgm",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
img_write_header,
|
|
img_write_packet,
|
|
img_write_trailer,
|
|
|
|
img_read_header,
|
|
img_read_packet,
|
|
img_read_close,
|
|
NULL,
|
|
};
|
|
|
|
AVFormat ppmpipe_format = {
|
|
"ppmpipe",
|
|
"PPM pipe format",
|
|
"",
|
|
"ppm",
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
img_write_header,
|
|
img_write_packet,
|
|
img_write_trailer,
|
|
|
|
img_read_header,
|
|
img_read_packet,
|
|
img_read_close,
|
|
NULL,
|
|
};
|