+/*****************************************************************************
+ * ConfigureIVTV: set up codec parameters using the old ivtv api
+ *****************************************************************************/
+static int ConfigureIVTV( access_t * p_access )
+{
+ access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
+ struct ivtv_ioctl_codec codec;
+ int result;
+
+ memset( &codec, 0, sizeof(struct ivtv_ioctl_codec) );
+
+ result = ioctl( p_sys->i_fd, IVTV_IOC_G_CODEC, &codec );
+ if( result < 0 )
+ {
+ msg_Err( p_access, "Failed to read current capture card settings." );
+ return VLC_EGENERIC;
+ }
+
+ if( p_sys->i_framerate != -1 )
+ {
+ switch( p_sys->i_framerate )
+ {
+ case 30:
+ codec.framerate = 0;
+ break;
+
+ case 25:
+ codec.framerate = 1;
+ break;
+
+ default:
+ msg_Warn( p_access, "Invalid framerate, reverting to 25." );
+ codec.framerate = 1;
+ break;
+ }
+ }
+
+ if( p_sys->i_bitrate != -1 )
+ {
+ codec.bitrate = p_sys->i_bitrate;
+ }
+
+ if( p_sys->i_bitrate_peak != -1 )
+ {
+ codec.bitrate_peak = p_sys->i_bitrate_peak;
+ }
+
+ if( p_sys->i_bitrate_mode != -1 )
+ {
+ codec.bitrate_mode = p_sys->i_bitrate_mode;
+ }
+
+ if( p_sys->i_audio_bitmask != -1 )
+ {
+ codec.audio_bitmask = p_sys->i_audio_bitmask;
+ }
+
+ if( p_sys->i_keyint != -1 )
+ {
+ codec.framespergop = p_sys->i_keyint;
+ }
+
+ if( p_sys->i_bframes != -1 )
+ {
+ codec.bframes = p_sys->i_bframes;
+ }
+
+ result = ioctl( p_sys->i_fd, IVTV_IOC_S_CODEC, &codec );
+ if( result < 0 )
+ {
+ msg_Err( p_access, "Failed to write new capture card settings." );
+ return VLC_EGENERIC;
+ }
+
+ msg_Dbg( p_access, "Setting codec parameters to: framerate: "
+ "%d, bitrate: %d/%d/%d",
+ codec.framerate, codec.bitrate,
+ codec.bitrate_peak, codec.bitrate_mode );
+ return VLC_SUCCESS;
+}
+
+#ifdef HAVE_NEW_LINUX_VIDEODEV2_H
+
+#define MAX_V4L2_CTRLS (6)
+/*****************************************************************************
+ * AddV4L2Ctrl: adds a control to the v4l2 controls list
+ *****************************************************************************/
+static void AddV4L2Ctrl( access_t * p_access,
+ struct v4l2_ext_controls * p_controls,
+ uint32_t i_id, uint32_t i_value )
+{
+ if( p_controls->count >= MAX_V4L2_CTRLS )
+ {
+ msg_Err( p_access, "Tried to set too many v4l2 controls at once." );
+ return;
+ }
+
+ p_controls->controls[p_controls->count].id = i_id;
+ p_controls->controls[p_controls->count].value = i_value;
+ p_controls->count++;
+}
+
+/*****************************************************************************
+ * V4L2SampleRate: calculate v4l2 sample rate from pvr-audio-bitmask
+ *****************************************************************************/
+static uint32_t V4L2SampleRate( uint32_t i_bitmask )
+{
+ switch( i_bitmask & 0x0003 )
+ {
+ case 0x0001: return V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000;
+ case 0x0002: return V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000;
+ }
+ return V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100;
+}
+
+/*****************************************************************************
+ * V4L2AudioEncoding: calculate v4l2 audio encoding level from pvr-audio-bitmask
+ *****************************************************************************/
+static uint32_t V4L2AudioEncoding( uint32_t i_bitmask )
+{
+ switch( i_bitmask & 0x000c )
+ {
+ case 0x0004: return V4L2_MPEG_AUDIO_ENCODING_LAYER_1;
+ case 0x0008: return V4L2_MPEG_AUDIO_ENCODING_LAYER_2;
+ }
+ return 0xffffffff;
+}
+
+/*****************************************************************************
+ * V4L2AudioL1Bitrate: calculate v4l2 audio bitrate for layer-1 audio from pvr-audio-bitmask
+ *****************************************************************************/
+static uint32_t V4L2AudioL1Bitrate( uint32_t i_bitmask )
+{
+ switch( i_bitmask & 0x00f0 )
+ {
+ case 0x0010: return V4L2_MPEG_AUDIO_L1_BITRATE_32K;
+ case 0x0020: return V4L2_MPEG_AUDIO_L1_BITRATE_64K;
+ case 0x0030: return V4L2_MPEG_AUDIO_L1_BITRATE_96K;
+ case 0x0040: return V4L2_MPEG_AUDIO_L1_BITRATE_128K;
+ case 0x0050: return V4L2_MPEG_AUDIO_L1_BITRATE_160K;
+ case 0x0060: return V4L2_MPEG_AUDIO_L1_BITRATE_192K;
+ case 0x0070: return V4L2_MPEG_AUDIO_L1_BITRATE_224K;
+ case 0x0080: return V4L2_MPEG_AUDIO_L1_BITRATE_256K;
+ case 0x0090: return V4L2_MPEG_AUDIO_L1_BITRATE_288K;
+ case 0x00a0: return V4L2_MPEG_AUDIO_L1_BITRATE_320K;
+ case 0x00b0: return V4L2_MPEG_AUDIO_L1_BITRATE_352K;
+ case 0x00c0: return V4L2_MPEG_AUDIO_L1_BITRATE_384K;
+ case 0x00d0: return V4L2_MPEG_AUDIO_L1_BITRATE_416K;
+ case 0x00e0: return V4L2_MPEG_AUDIO_L1_BITRATE_448K;
+ }
+ return V4L2_MPEG_AUDIO_L1_BITRATE_320K;
+}
+
+/*****************************************************************************
+ * V4L2AudioL2Bitrate: calculate v4l2 audio bitrate for layer-1 audio from pvr-audio-bitmask
+ *****************************************************************************/
+static uint32_t V4L2AudioL2Bitrate( uint32_t i_bitmask )
+{
+ switch( i_bitmask & 0x00f0 )
+ {
+ case 0x0010: return V4L2_MPEG_AUDIO_L2_BITRATE_32K;
+ case 0x0020: return V4L2_MPEG_AUDIO_L2_BITRATE_48K;
+ case 0x0030: return V4L2_MPEG_AUDIO_L2_BITRATE_56K;
+ case 0x0040: return V4L2_MPEG_AUDIO_L2_BITRATE_64K;
+ case 0x0050: return V4L2_MPEG_AUDIO_L2_BITRATE_80K;
+ case 0x0060: return V4L2_MPEG_AUDIO_L2_BITRATE_96K;
+ case 0x0070: return V4L2_MPEG_AUDIO_L2_BITRATE_112K;
+ case 0x0080: return V4L2_MPEG_AUDIO_L2_BITRATE_128K;
+ case 0x0090: return V4L2_MPEG_AUDIO_L2_BITRATE_160K;
+ case 0x00a0: return V4L2_MPEG_AUDIO_L2_BITRATE_192K;
+ case 0x00b0: return V4L2_MPEG_AUDIO_L2_BITRATE_224K;
+ case 0x00c0: return V4L2_MPEG_AUDIO_L2_BITRATE_256K;
+ case 0x00d0: return V4L2_MPEG_AUDIO_L2_BITRATE_320K;
+ case 0x00e0: return V4L2_MPEG_AUDIO_L2_BITRATE_384K;
+ }
+ return V4L2_MPEG_AUDIO_L2_BITRATE_192K;
+}
+
+/*****************************************************************************
+ * V4L2AudioMode: calculate v4l2 audio mode from pvr-audio-bitmask
+ *****************************************************************************/
+static uint32_t V4L2AudioMode( uint32_t i_bitmask )
+{
+ switch( i_bitmask & 0x0300 )
+ {
+ case 0x0100: return V4L2_MPEG_AUDIO_MODE_JOINT_STEREO;
+ case 0x0200: return V4L2_MPEG_AUDIO_MODE_DUAL;
+ case 0x0300: return V4L2_MPEG_AUDIO_MODE_MONO;
+ }
+ return V4L2_MPEG_AUDIO_MODE_STEREO;
+}
+
+/*****************************************************************************
+ * ConfigureV4L2: set up codec parameters using the new v4l2 api
+ *****************************************************************************/
+static int ConfigureV4L2( access_t * p_access )
+{
+ access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
+ struct v4l2_ext_controls controls;
+ int result;
+
+ memset( &controls, 0, sizeof(struct v4l2_ext_controls) );
+ controls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
+ controls.error_idx = 0;
+ controls.reserved[0] = 0;
+ controls.reserved[1] = 0;
+ controls.count = 0;
+ controls.controls = calloc( MAX_V4L2_CTRLS,
+ sizeof( struct v4l2_ext_control ) );
+
+ if( controls.controls == NULL )
+ return VLC_ENOMEM;
+
+ /* Note: Ignore frame rate. Doesn't look like it can be changed. */
+ if( p_sys->i_bitrate != -1 )
+ {
+ AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE,
+ p_sys->i_bitrate );
+ msg_Dbg( p_access, "Setting [%u] bitrate = %u",
+ controls.count - 1, p_sys->i_bitrate );
+ }
+
+ if( p_sys->i_bitrate_peak != -1 )
+ {
+ AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
+ p_sys->i_bitrate_peak );
+ msg_Dbg( p_access, "Setting [%u] bitrate_peak = %u",
+ controls.count - 1, p_sys->i_bitrate_peak );
+ }
+
+ if( p_sys->i_bitrate_mode != -1 )
+ {
+ AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
+ p_sys->i_bitrate_mode );
+ msg_Dbg( p_access, "Setting [%u] bitrate_mode = %u",
+ controls.count - 1, p_sys->i_bitrate_mode );
+ }
+
+ if( p_sys->i_audio_bitmask != -1 )
+ {
+ /* Sample rate */
+ AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
+ V4L2SampleRate( p_sys->i_audio_bitmask ) );
+
+ /* Encoding layer and bitrate */
+ switch( V4L2AudioEncoding( p_sys->i_audio_bitmask ) )
+ {
+ case V4L2_MPEG_AUDIO_ENCODING_LAYER_1:
+ AddV4L2Ctrl( p_access, &controls,
+ V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
+ V4L2_MPEG_AUDIO_ENCODING_LAYER_1 );
+ AddV4L2Ctrl( p_access, &controls,
+ V4L2_CID_MPEG_AUDIO_L1_BITRATE,
+ V4L2AudioL1Bitrate( p_sys->i_audio_bitmask ) );
+ break;
+
+ case V4L2_MPEG_AUDIO_ENCODING_LAYER_2:
+ AddV4L2Ctrl( p_access, &controls,
+ V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
+ V4L2_MPEG_AUDIO_ENCODING_LAYER_2 );
+ AddV4L2Ctrl( p_access, &controls,
+ V4L2_CID_MPEG_AUDIO_L2_BITRATE,
+ V4L2AudioL2Bitrate( p_sys->i_audio_bitmask ) );
+ break;
+ }
+
+ /* Audio mode - stereo or mono */
+ AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_AUDIO_MODE,
+ V4L2AudioMode( p_sys->i_audio_bitmask ) );
+
+ /* See if the user wants any other audio feature */
+ if( ( p_sys->i_audio_bitmask & 0x1ff00 ) != 0 )
+ {
+ /* It would be possible to support the bits that represent:
+ * V4L2_CID_MPEG_AUDIO_MODE_EXTENSION
+ * V4L2_CID_MPEG_AUDIO_EMPHASIS
+ * V4L2_CID_MPEG_AUDIO_CRC
+ * but they are not currently used. Tell the user.
+ */
+ msg_Err( p_access, "There were bits in pvr-audio-bitmask that were not used.");
+ }
+ msg_Dbg( p_access, "Setting audio controls");
+ }
+
+ if( p_sys->i_keyint != -1 )
+ {
+ AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_GOP_SIZE,
+ p_sys->i_keyint );
+ msg_Dbg( p_access, "Setting [%u] keyint = %u",
+ controls.count - 1, p_sys->i_keyint );
+ }
+
+ if( p_sys->i_bframes != -1 )
+ {
+ AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_B_FRAMES,
+ p_sys->i_bframes );
+ msg_Dbg( p_access, "Setting [%u] bframes = %u",
+ controls.count - 1, p_sys->i_bframes );
+ }
+
+ result = ioctl( p_sys->i_fd, VIDIOC_S_EXT_CTRLS, &controls );
+ if( result < 0 )
+ {
+ msg_Err( p_access, "Failed to write %u new capture card settings.",
+ controls.error_idx );
+ }
+ free( controls.controls );
+ return VLC_SUCCESS;
+}
+
+#endif /* HAVE_NEW_LINUX_VIDEODEV2_H */
+