Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

V4L/DVB (8640): saa6752hs: add PMT table for AC3

Browse source 
The PMT table for AC3 audio is different.
Thanks to Dmitry Belimov for providing the table data.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2008-08-08 13:27:16 -03:00 committed by Mauro Carvalho Chehab
parent e281db5862
commit 3eea543b72
1 changed files with 50 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

63
drivers/media/video/saa7134/saa6752hs.c
View file

@ -172,6 +172,39 @@ static u8 PMT[] = {
0x00, 0x00, 0x00, 0x00 /* CRC32 */
};
static u8 PMT_AC3[] = {
0xc2, /* i2c register */
0x01, /* table number for encoder(1) */
0x47, /* sync */
0x40, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0) */
0x10, /* PMT PID (0x0010) */
0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
0x00, /* PSI pointer to start of table */
0x02, /* TID (2) */
0xb0, 0x1a, /* section_syntax_indicator(1), section_length(26) */
0x00, 0x01, /* program_number(1) */
0xc1, /* version_number(0), current_next_indicator(1) */
0x00, 0x00, /* section_number(0), last_section_number(0) */
0xe1, 0x04, /* PCR_PID (0x0104) */
0xf0, 0x00, /* program_info_length(0) */
0x02, 0xe1, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
0x06, 0xe1, 0x03, 0xf0, 0x03, /* audio stream type(6), pid */
0x6a, /* AC3 */
0x01, /* Descriptor_length(1) */
0x00, /* component_type_flag(0), bsid_flag(0), mainid_flag(0), asvc_flag(0), reserved flags(0) */
0xED, 0xDE, 0x2D, 0xF3 /* CRC32 BE */
};
static struct saa6752hs_mpeg_params param_defaults =
{
.ts_pid_pmt = 16,
@ -186,7 +219,7 @@ static struct saa6752hs_mpeg_params param_defaults =
.au_encoding = V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
.au_l2_bitrate = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
.au_ac3_bitrate = V4L2_MPEG_AUDIO_AC3_BITRATE_384K,
.au_ac3_bitrate = V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
};
/* ---------------------------------------------------------------------- */
@ -295,10 +328,7 @@ static int saa6752hs_set_bitrate(struct i2c_client* client,
/* set the audio encoding */
buf[0] = 0x93;
if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3)
buf[1] = 1;
else
buf[1] = 0;
buf[1] = (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
i2c_master_send(client, buf, 2);
/* set the audio bitrate */
@ -627,6 +657,7 @@ static int saa6752hs_init(struct i2c_client* client)
{
unsigned char buf[9], buf2[4];
struct saa6752hs_state *h;
unsigned size;
u32 crc;
unsigned char localPAT[256];
unsigned char localPMT[256];
@ -685,7 +716,13 @@ static int saa6752hs_init(struct i2c_client* client)
localPAT[sizeof(PAT) - 1] = crc & 0xFF;
/* compute PMT */
memcpy(localPMT, PMT, sizeof(PMT));
if (h->params.au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) {
size = sizeof(PMT_AC3);
memcpy(localPMT, PMT_AC3, size);
} else {
size = sizeof(PMT);
memcpy(localPMT, PMT, size);
}
localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
localPMT[4] = h->params.ts_pid_pmt & 0xff;
localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
@ -694,11 +731,11 @@ static int saa6752hs_init(struct i2c_client* client)
localPMT[21] = h->params.ts_pid_video & 0xFF;
localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
localPMT[26] = h->params.ts_pid_audio & 0xFF;
crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
localPMT[sizeof(PMT) - 1] = crc & 0xFF;
crc = crc32_be(~0, &localPMT[7], size - 7 - 4);
localPMT[size - 4] = (crc >> 24) & 0xFF;
localPMT[size - 3] = (crc >> 16) & 0xFF;
localPMT[size - 2] = (crc >> 8) & 0xFF;
localPMT[size - 1] = crc & 0xFF;
/* Set Audio PID */
buf[0] = 0xC1;
@ -719,8 +756,8 @@ static int saa6752hs_init(struct i2c_client* client)
i2c_master_send(client,buf,3);
/* Send SI tables */
i2c_master_send(client,localPAT,sizeof(PAT));
i2c_master_send(client,localPMT,sizeof(PMT));
i2c_master_send(client, localPAT, sizeof(PAT));
i2c_master_send(client, localPMT, size);
/* mute then unmute audio. This removes buzzing artefacts */
buf[0] = 0xa4;