Al final, parece que Google ha liberado el codec para competir con H264.
¿Alguien se anima a añadir soporte para Bennu?.
Me aburría y he escrito un poco de código tonto que, por supuesto, no funciona basado en uno de los ejemplos que distribuyen:
[code language="c"]/* WebM module for BennuGD
* Copyright © 2010 Joseba García Etxebarria <joseba.gar@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include "vpx_decoder.h"
#include "vp8dx.h"
#define VPX_CODEC_DISABLE_COMPAT 1
#define IVF_FILE_HDR_SZ (32)
#define IVF_FRAME_HDR_SZ (12)
#define interface (&vpx_codec_vp8_dx_algo)
/* BennuGD stuff */
#include <bgddl.h>
#include <xstrings.h>
#include <libgrbase.h>
#include <g_video.h>
static unsigned int mem_get_le32(const unsigned char *mem) {
return (mem[3] << 24)|(mem[2] << 16)|(mem[1] << 8)|(mem[0]);
}
static FILE *infile;
static int playing_video = 0;
static vpx_codec_ctx_t codec;
int frame_sz;
vpx_codec_iter_t iter = NULL;
vpx_image_t *img;
/*********************************************/
/* Plays the given video with WebM */
/* Must be given: */
/* filename to be played */
/* width of the video to render */
/* height of the video to render */
/*********************************************/
static int video_play(INSTANCE *my, int * params)
{
GRAPH *gr = NULL;
int flags = 0, frame_cnt = 0;
unsigned char file_hdr[IVF_FILE_HDR_SZ];
unsigned char frame_hdr[IVF_FRAME_HDR_SZ];
unsigned char frame[256*1024];
vpx_codec_err_t res;
(void)res;
/* Ensure we're not playing a video already */
if(playing_video == 1)
return -1;
/* Ensure we can read the given file */
if(!(infile = fopen(string_get(params[0]), "rb")))
return -1;
/* Discard the file path, as we don't need it anymore */
string_discard(params[0]);
/* Start the graphics mode, if not initialized yet */
if(! scr_initialized)
gr_init(320, 240);
/* Read file header */
fread(file_hdr, 1, IVF_FILE_HDR_SZ, infile);
if(!(file_hdr[0]=='D' && file_hdr[1]=='K' && file_hdr[2]=='I'
&& file_hdr[3]=='F'))
return -1;
/* Initialize codec */
if(vpx_codec_dec_init(&codec, interface, NULL, flags))
return -1;
/* Create the graphic that will hold the video surface data */
gr = bitmap_new(0, params[1], params[2], 16);
gr->code = bitmap_next_code();
grlib_add_map(0, gr);
/* Render the first frame */
fread(frame_hdr, 1, IVF_FRAME_HDR_SZ, infile);
frame_sz = mem_get_le32(frame_hdr);
frame_cnt++;
if(frame_sz > sizeof(frame))
return -1;
if(fread(frame, 1, frame_sz, infile) != frame_sz)
return -1;
if(vpx_codec_decode(&codec, frame, frame_sz, NULL, 0))
return -1;
img = vpx_codec_get_frame(&codec, &iter);
/* Lock the video playback */
playing_video = 1;
return gr->code;
}
/* Stop the currently being played video and release WebM codec */
static int video_stop(INSTANCE *my, int * params)
{
if(! playing_video)
return 0;
/* Stop the decoding */
if(vpx_codec_destroy(&codec))
return -1;
fclose(infile);
/* Release the video playback lock */
playing_video = 0;
return 0;
}
/* Checks wether the current video is being played */
static int video_is_playing() {
return playing_video;
}
DLSYSFUNCS __bgdexport( mod_webm, functions_exports )[] =
{
{"VIDEO_PLAY" , "SII" , TYPE_DWORD , video_play },
{"VIDEO_PLAYING" , "" , TYPE_DWORD , video_is_playing },
{"VIDEO_STOP" , "" , TYPE_DWORD , video_stop },
{ NULL , NULL , 0 , NULL }
};
char * __bgdexport( mod_webm, modules_dependency )[] =
{
"libgrbase",
"libvideo",
NULL
};
void __bgdexport( mod_webm, module_finalize )()
{
video_stop(NULL, NULL);
}[/code]
Teneis el código fuente del códec con ejemplos aquí:
http://www.webmproject.org/
Se avecinan tiempos de guerra!!