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V4L/DVB (8640): saa6752hs: add PMT table for AC3
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>
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@ -172,6 +172,39 @@ static u8 PMT[] = {
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0x00, 0x00, 0x00, 0x00 /* CRC32 */
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};
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static u8 PMT_AC3[] = {
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0xc2, /* i2c register */
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0x01, /* table number for encoder(1) */
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0x47, /* sync */
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0x40, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0) */
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0x10, /* PMT PID (0x0010) */
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0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
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0x00, /* PSI pointer to start of table */
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0x02, /* TID (2) */
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0xb0, 0x1a, /* section_syntax_indicator(1), section_length(26) */
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0x00, 0x01, /* program_number(1) */
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0xc1, /* version_number(0), current_next_indicator(1) */
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0x00, 0x00, /* section_number(0), last_section_number(0) */
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0xe1, 0x04, /* PCR_PID (0x0104) */
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0xf0, 0x00, /* program_info_length(0) */
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0x02, 0xe1, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
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0x06, 0xe1, 0x03, 0xf0, 0x03, /* audio stream type(6), pid */
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0x6a, /* AC3 */
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0x01, /* Descriptor_length(1) */
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0x00, /* component_type_flag(0), bsid_flag(0), mainid_flag(0), asvc_flag(0), reserved flags(0) */
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0xED, 0xDE, 0x2D, 0xF3 /* CRC32 BE */
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};
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static struct saa6752hs_mpeg_params param_defaults =
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{
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.ts_pid_pmt = 16,
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@ -186,7 +219,7 @@ static struct saa6752hs_mpeg_params param_defaults =
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.au_encoding = V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
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.au_l2_bitrate = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
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.au_ac3_bitrate = V4L2_MPEG_AUDIO_AC3_BITRATE_384K,
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.au_ac3_bitrate = V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
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};
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/* ---------------------------------------------------------------------- */
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@ -295,10 +328,7 @@ static int saa6752hs_set_bitrate(struct i2c_client* client,
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/* set the audio encoding */
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buf[0] = 0x93;
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if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3)
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buf[1] = 1;
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else
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buf[1] = 0;
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buf[1] = (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
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i2c_master_send(client, buf, 2);
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/* set the audio bitrate */
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@ -627,6 +657,7 @@ static int saa6752hs_init(struct i2c_client* client)
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{
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unsigned char buf[9], buf2[4];
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struct saa6752hs_state *h;
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unsigned size;
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u32 crc;
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unsigned char localPAT[256];
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unsigned char localPMT[256];
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@ -685,7 +716,13 @@ static int saa6752hs_init(struct i2c_client* client)
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localPAT[sizeof(PAT) - 1] = crc & 0xFF;
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/* compute PMT */
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memcpy(localPMT, PMT, sizeof(PMT));
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if (h->params.au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) {
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size = sizeof(PMT_AC3);
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memcpy(localPMT, PMT_AC3, size);
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} else {
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size = sizeof(PMT);
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memcpy(localPMT, PMT, size);
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}
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localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
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localPMT[4] = h->params.ts_pid_pmt & 0xff;
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localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
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@ -694,11 +731,11 @@ static int saa6752hs_init(struct i2c_client* client)
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localPMT[21] = h->params.ts_pid_video & 0xFF;
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localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
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localPMT[26] = h->params.ts_pid_audio & 0xFF;
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crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
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localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
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localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
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localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
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localPMT[sizeof(PMT) - 1] = crc & 0xFF;
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crc = crc32_be(~0, &localPMT[7], size - 7 - 4);
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localPMT[size - 4] = (crc >> 24) & 0xFF;
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localPMT[size - 3] = (crc >> 16) & 0xFF;
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localPMT[size - 2] = (crc >> 8) & 0xFF;
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localPMT[size - 1] = crc & 0xFF;
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/* Set Audio PID */
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buf[0] = 0xC1;
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@ -719,8 +756,8 @@ static int saa6752hs_init(struct i2c_client* client)
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i2c_master_send(client,buf,3);
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/* Send SI tables */
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i2c_master_send(client,localPAT,sizeof(PAT));
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i2c_master_send(client,localPMT,sizeof(PMT));
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i2c_master_send(client, localPAT, sizeof(PAT));
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i2c_master_send(client, localPMT, size);
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/* mute then unmute audio. This removes buzzing artefacts */
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buf[0] = 0xa4;
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