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vlc-2-2
Commit c532a10b authored by Jean-Paul Saman's avatar Jean-Paul Saman
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Patch by Richard Hosking: Honor user specified chroma if the device supports it.

parent c450285e
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Showing with 75 additions and 65 deletions
modules/access/v4l2.c
View file @ c532a10b
......@@ -157,8 +157,7 @@ static block_t* GrabVideo( demux_t *p_demux );
static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame );
static block_t* GrabAudio( demux_t *p_demux );
vlc_bool_t IsChromaSupported( demux_t *p_demux, unsigned int i_v4l2 );
unsigned int GetFourccFromString( char *psz_fourcc );
vlc_bool_t IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat );
static int OpenVideoDev( demux_t *, char *psz_device );
static int OpenAudioDev( demux_t *, char *psz_device );
......@@ -204,6 +203,8 @@ struct demux_sys_t
char *psz_adev;
int i_fd_audio;
char *psz_requested_chroma;
/* Video */
io_method io;
......@@ -264,7 +265,6 @@ static int Open( vlc_object_t *p_this )
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
vlc_value_t val;
char *psz;
/* Only when selected */
if( *p_demux->psz_access == '\0' ) return VLC_EGENERIC;
......@@ -297,9 +297,7 @@ static int Open( vlc_object_t *p_this )
var_Get( p_demux, "v4l2-samplerate", &val );
p_sys->i_sample_rate = val.i_int;
psz = var_CreateGetString( p_demux, "v4l2-chroma" );
p_sys->i_fourcc = GetFourccFromString( psz );
free( psz );
p_sys->psz_requested_chroma = var_CreateGetString( p_demux, "v4l2-chroma" );
var_Create( p_demux, "v4l2-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
var_Get( p_demux, "v4l2-stereo", &val );
......@@ -374,9 +372,10 @@ static int Open( vlc_object_t *p_this )
if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
{
if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l2-dev" );;
p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l2-dev" );
}
msg_Dbg( p_demux, "opening '%s' as video", p_sys->psz_vdev );
if( p_sys->psz_vdev && *p_sys->psz_vdev && ProbeVideoDev( p_demux, p_sys->psz_vdev ) )
{
p_sys->i_fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
......@@ -389,9 +388,10 @@ static int Open( vlc_object_t *p_this )
if( !p_sys->psz_adev || !*p_sys->psz_adev )
{
if( p_sys->psz_adev ) free( p_sys->psz_adev );
p_sys->psz_adev = var_CreateGetString( p_demux, "v4l2-adev" );;
p_sys->psz_adev = var_CreateGetString( p_demux, "v4l2-adev" );
}
msg_Dbg( p_demux, "opening '%s' as audio", p_sys->psz_adev );
if( p_sys->psz_adev && *p_sys->psz_adev && ProbeAudioDev( p_demux, p_sys->psz_adev ) )
{
p_sys->i_fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
......@@ -489,9 +489,8 @@ static void ParseMRL( demux_t *p_demux )
i_len = strlen( psz_parser );
}
char* chroma = strndup( psz_parser, i_len );
p_sys->i_fourcc = GetFourccFromString( chroma );
free( chroma );
if( p_sys->psz_requested_chroma ) free( p_sys->psz_requested_chroma );
p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
psz_parser += i_len;
}
......@@ -655,6 +654,7 @@ static void Close( vlc_object_t *p_this )
if( p_sys->p_inputs ) free( p_sys->p_inputs );
if( p_sys->p_tuners ) free( p_sys->p_tuners );
if( p_sys->p_codecs ) free( p_sys->p_codecs );
if( p_sys->psz_requested_chroma ) free( p_sys->psz_requested_chroma );
free( p_sys );
}
......@@ -825,7 +825,7 @@ static block_t* GrabVideo( demux_t *p_demux )
default:
msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
return 0;
}
}
}
/* Find frame? */
......@@ -836,7 +836,8 @@ static block_t* GrabVideo( demux_t *p_demux )
buf.length == p_sys->p_buffers[i].length ) break;
}
if( i >= p_sys->i_nbuffers ) {
if( i >= p_sys->i_nbuffers )
{
msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
return 0;
}
......@@ -1077,38 +1078,16 @@ open_failed:
}
/*****************************************************************************
* GetFourccFromString: Returns the fourcc code from the given string
* IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
* in the array of supported formats returned by the driver
*****************************************************************************/
unsigned int GetFourccFromString( char *psz_fourcc )
{
if( strlen( psz_fourcc ) >= 4 )
{
int i_chroma = VLC_FOURCC( psz_fourcc[0], psz_fourcc[1], psz_fourcc[2], psz_fourcc[3] );
/* Find out v4l2 chroma code */
for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
{
if( v4l2chroma_to_fourcc[i].i_fourcc == i_chroma )
{
return v4l2chroma_to_fourcc[i].i_fourcc;
}
}
}
return 0;
}
/*****************************************************************************
* IsChromaSupported: returns true if the specified V4L2 chroma constant is
* in the array of supported chromas returned by the driver
*****************************************************************************/
vlc_bool_t IsChromaSupported( demux_t *p_demux, unsigned int i_chroma )
vlc_bool_t IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
{
demux_sys_t *p_sys = p_demux->p_sys;
for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
{
if( p_sys->p_codecs[i_index].pixelformat == i_chroma ) return VLC_TRUE;
if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat ) return VLC_TRUE;
}
return VLC_FALSE;
......@@ -1139,8 +1118,8 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
{
if( ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
{
msg_Err( p_demux, "cannot set input (%m)" );
goto open_failed;
msg_Err( p_demux, "cannot set standard (%m)" );
goto open_failed;
}
msg_Dbg( p_demux, "Set standard" );
}
......@@ -1155,8 +1134,8 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
if( ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
{
msg_Err( p_demux, "cannot set input (%m)" );
goto open_failed;
msg_Err( p_demux, "cannot set input (%m)" );
goto open_failed;
}
/* Verify device support for the various IO methods */
......@@ -1206,11 +1185,12 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
}
/* Try and find default resolution if not specified */
if( !p_sys->i_width && !p_sys->i_height ) {
if( !p_sys->i_width && !p_sys->i_height )
{
memset( &fmt, 0, sizeof(fmt) );
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if ( ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
if( ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
{
msg_Err( p_demux, "Cannot get default width and height." );
goto open_failed;
......@@ -1231,21 +1211,27 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
/* Test and set Chroma */
fmt.fmt.pix.pixelformat = 0;
if( p_sys->i_fourcc )
if( p_sys->psz_requested_chroma && strlen( p_sys->psz_requested_chroma ) > 0 )
{
/* User specified chroma */
for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
{
if( v4l2chroma_to_fourcc[i].i_fourcc == p_sys->i_fourcc )
if( strlen( p_sys->psz_requested_chroma ) >= 4 )
{
int i_requested_fourcc = VLC_FOURCC(
p_sys->psz_requested_chroma[0], p_sys->psz_requested_chroma[1],
p_sys->psz_requested_chroma[2], p_sys->psz_requested_chroma[3] );
for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
{
fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
break;
if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
{
fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
break;
}
}
}
/* Try and set user chroma */
if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ( fmt.fmt.pix.pixelformat && ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) )
if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ( fmt.fmt.pix.pixelformat && ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) )
{
msg_Warn( p_demux, "Driver is unable to use specified chroma %4.4s. Using defaults.", (char *)&fmt.fmt.pix.pixelformat );
msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
fmt.fmt.pix.pixelformat = 0;
}
}
......@@ -1254,13 +1240,13 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
if( !fmt.fmt.pix.pixelformat )
{
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YVU420;
if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
{
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
{
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
{
msg_Err( p_demux, "Could not select any of the default chromas!" );
goto open_failed;
......@@ -1362,14 +1348,16 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
if( ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 ) {
if( ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
{
msg_Err( p_demux, "VIDIOC_QBUF failed" );
goto open_failed;
}
}
buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if( ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 ) {
if( ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
{
msg_Err( p_demux, "VIDIOC_STREAMON failed" );
goto open_failed;
}
......@@ -1388,14 +1376,16 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
buf.length = p_sys->p_buffers[i].length;
if( ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 ) {
if( ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
{
msg_Err( p_demux, "VIDIOC_QBUF failed" );
goto open_failed;
}
}
buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if( ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 ) {
if( ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
{
msg_Err( p_demux, "VIDIOC_STREAMON failed" );
goto open_failed;
}
......@@ -1412,7 +1402,7 @@ int OpenVideoDev( demux_t *p_demux, char *psz_device )
return i_fd;
open_failed:
if( i_fd ) close( i_fd );
if( i_fd >= 0 ) close( i_fd );
return -1;
}
......@@ -1693,9 +1683,29 @@ vlc_bool_t ProbeVideoDev( demux_t *p_demux, char *psz_device )
msg_Err( p_demux, "cannot get codec description (%m)" );
goto open_failed;
}
msg_Dbg( p_demux, "device supports Codec %s",
/* only print if vlc supports the format */
vlc_bool_t b_codec_supported = VLC_FALSE;
for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
{
if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
{
b_codec_supported = VLC_TRUE;
char psz_fourcc[5];
memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc, &psz_fourcc );
msg_Dbg( p_demux, "device supports chroma %4s [%s]",
psz_fourcc,
p_sys->p_codecs[i_index].description );
}
}
if( !b_codec_supported )
{
msg_Dbg( p_demux, "device codec %s not supported",
p_sys->p_codecs[i_index].description );
}
}
}
......@@ -1731,11 +1741,11 @@ vlc_bool_t ProbeAudioDev( demux_t *p_demux, char *psz_device )
goto open_failed;
}
if( i_fd ) close( i_fd );
if( i_fd >= 0 ) close( i_fd );
return VLC_TRUE;
open_failed:
if( i_fd ) close( i_fd );
if( i_fd >= 0 ) close( i_fd );
return VLC_FALSE;
}
......
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