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/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2012 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* 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 2 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 <stdlib.h>
#include <string.h>
#include <avdec_private.h>
#include <codecs.h>
#include <vpx/vpx_decoder.h>
#include <vpx/vpx_codec.h>
#include <vpx/vp8dx.h>
#define LOG_DOMAIN "vpx"
// #define DUMP_DECODE
typedef struct
{
vpx_codec_ctx_t decoder;
gavl_video_frame_t * frame;
} vpx_t;
static int create_decoder(bgav_stream_t * s)
{
vpx_t * priv;
struct vpx_codec_dec_cfg deccfg;
const struct vpx_codec_iface *iface;
memset(&deccfg, 0, sizeof(deccfg));
deccfg.threads = s->opt->threads;
priv = s->data.video.decoder->priv;
iface = &vpx_codec_vp8_dx_algo;
if(vpx_codec_dec_init(&priv->decoder, iface, &deccfg, 0) != VPX_CODEC_OK)
{
const char *error = vpx_codec_error(&priv->decoder);
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN, "Failed to initialize decoder: %s",
error);
return 0;
}
return 1;
}
static int init_vpx(bgav_stream_t * s)
{
vpx_t * priv;
priv = calloc(1, sizeof(*priv));
s->data.video.decoder->priv = priv;
if(!create_decoder(s))
return 0;
s->data.video.format.pixelformat = GAVL_YUV_420_P;
priv->frame = gavl_video_frame_create(NULL);
s->description = bgav_sprintf("VP8");
return 1;
}
static int decode_vpx(bgav_stream_t * s, gavl_video_frame_t * f)
{
vpx_t * priv;
bgav_packet_t * p;
vpx_image_t *img;
const void * iter = NULL;
priv = s->data.video.decoder->priv;
/* We assume one frame per packet */
p = bgav_stream_get_packet_read(s);
if(!p)
return 0;
#ifdef DUMP_DECODE
bgav_packet_dump(p);
#endif
if(vpx_codec_decode(&priv->decoder, p->data, p->data_size, NULL, 0) !=
VPX_CODEC_OK)
{
const char *error = vpx_codec_error(&priv->decoder);
const char *detail = vpx_codec_error_detail(&priv->decoder);
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN,
"Failed to decode frame: %s", error);
if (detail)
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN,
" Additional information: %s\n",
detail);
return 0;
}
img = vpx_codec_get_frame(&priv->decoder, &iter);
if(!img)
return 0;
/* Skip frame */
if(f)
{
priv->frame->planes[0] = img->planes[0];
priv->frame->planes[1] = img->planes[1];
priv->frame->planes[2] = img->planes[2];
priv->frame->strides[0] = img->stride[0];
priv->frame->strides[1] = img->stride[1];
priv->frame->strides[2] = img->stride[2];
gavl_video_frame_copy(&s->data.video.format,
f, priv->frame);
f->timestamp = p->pts;
f->duration = p->duration;
}
// vpx_img_free (img);
/* Should never happen */
while((img = vpx_codec_get_frame(&priv->decoder, &iter)))
{
gavl_log(GAVL_LOG_WARNING, LOG_DOMAIN,
"Ignoring additional frame\n");
}
bgav_stream_done_packet_read(s, p);
return 1;
}
static void close_vpx(bgav_stream_t * s)
{
vpx_t * priv;
priv = s->data.video.decoder->priv;
gavl_video_frame_null(priv->frame);
gavl_video_frame_destroy(priv->frame);
vpx_codec_destroy(&priv->decoder);
free(priv);
}
static void resync_vpx(bgav_stream_t * s)
{
#if 0
vpx_t * priv;
priv = s->data.video.decoder->priv;
/* Recreate decoder */
vpx_codec_destroy(&priv->decoder);
create_decoder(s);
#endif
// fprintf(stderr, "resync_vpx");
}
static bgav_video_decoder_t vpx_decoder =
{
.name = "VP8 video decoder",
.fourccs = (uint32_t[]){ BGAV_MK_FOURCC('V', 'P', '8', '0'), 0x00 },
.init = init_vpx,
.decode = decode_vpx,
.resync = resync_vpx,
.close = close_vpx,
};
void bgav_init_video_decoders_vpx()
{
bgav_video_decoder_register(&vpx_decoder);
}
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