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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 <stdlib.h>
#include <config.h>
#include <avdec_private.h>
#include <codecs.h>
#include <linux/videodev2.h>
#include <gavl/hw_v4l2.h>
static gavl_array_t * v4l_devices = NULL;
typedef struct
{
gavl_v4l2_device_t * dev;
gavl_hw_context_t * hwctx;
gavl_packet_source_t * psrc;
} v4l2_t;
static int init_v4l2(bgav_stream_t * s)
{
const gavl_dictionary_t * dev_file;
v4l2_t * priv;
if(!(dev_file = gavl_v4l2_get_decoder(v4l_devices, s->ci.id)))
return 0;
fprintf(stderr, "Got device %s\n", gavl_dictionary_get_string(dev_file, GAVL_META_URI));
priv = calloc(1, sizeof(*priv));
priv->hwctx = gavl_hw_ctx_create_v4l2(dev_file);
priv->dev = gavl_hw_ctx_v4l2_get_device(priv->hwctx);
priv->psrc =
gavl_packet_source_create_video(bgav_stream_read_packet_func, // get_packet,
s, GAVL_SOURCE_SRC_ALLOC, &s->ci, s->data.video.format);
fprintf(stderr, "Opened device %p\n", priv->dev);
if(!gavl_v4l2_device_init_decoder(priv->dev, s->info, priv->psrc))
return 0;
s->data.video.vsrc = gavl_v4l2_device_get_video_source(priv->dev);
s->decoder_priv = priv;
return 1;
}
/*
Unused because we use the video source
*/
static gavl_source_status_t
decode_v4l2(bgav_stream_t * s, gavl_video_frame_t * frame)
{
return GAVL_SOURCE_EOF;
}
static void close_v4l2(bgav_stream_t * s)
{
v4l2_t * priv;
priv = s->decoder_priv;
/* dev is owned by hwctx */
// if(priv->dev)
// gavl_v4l2_device_close(priv->dev);
if(priv->psrc)
gavl_packet_source_destroy(priv->psrc);
if(priv->hwctx)
gavl_hw_ctx_destroy(priv->hwctx);
free(priv);
}
static void resync_v4l2(bgav_stream_t * s)
{
v4l2_t * priv;
priv = s->decoder_priv;
gavl_v4l2_device_resync_decoder(priv->dev);
}
#define H264_FOURCCS \
BGAV_MK_FOURCC('a', 'v', 'c', '1'), \
BGAV_MK_FOURCC('H', '2', '6', '4'), \
BGAV_MK_FOURCC('h', '2', '6', '4')
#define V4L_DECODER(n, f) \
{ \
.name = "V4L2 M2M " n " Decoder", \
.fourccs = (uint32_t[]){ f, 0x00 },\
.init = init_v4l2, \
.decode = decode_v4l2, \
.close = close_v4l2, \
.resync = resync_v4l2, \
}
static struct
{
gavl_codec_id_t codec_id;
bgav_video_decoder_t decoder;
}
decoders[] =
{
{
GAVL_CODEC_ID_H264,
V4L_DECODER("H.264", H264_FOURCCS)
},
{ /* End */ }
};
void bgav_init_video_decoders_v4l2()
{
int idx = 0;
v4l_devices = gavl_array_create();
gavl_v4l2_devices_scan_by_type(GAVL_V4L2_DEVICE_DECODER, v4l_devices);
while(decoders[idx].codec_id)
{
if(gavl_v4l2_get_decoder(v4l_devices, decoders[idx].codec_id))
{
fprintf(stderr, "Registering %s\n", decoders[idx].decoder.name);
bgav_video_decoder_register(&decoders[idx].decoder);
}
idx++;
}
}
#if defined(__GNUC__) && defined(__ELF__)
static void __cleanup() __attribute__ ((destructor));
static void __cleanup()
{
if(v4l_devices)
gavl_array_destroy(v4l_devices);
}
#endif
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