#include <linux/types.h>
#include <linux/videodev.h>
#include <linux/init.h>
+#include <linux/crc32.h>
#include <media/id.h>
-#include <media/saa6752hs.h>
+
+#define MPEG_VIDEO_TARGET_BITRATE_MAX 27000
+#define MPEG_VIDEO_MAX_BITRATE_MAX 27000
+#define MPEG_TOTAL_TARGET_BITRATE_MAX 27000
+#define MPEG_PID_MAX ((1 << 14) - 1)
/* Addresses to scan */
static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
static struct i2c_driver driver;
static struct i2c_client client_template;
+enum saa6752hs_videoformat {
+ SAA6752HS_VF_D1 = 0, /* standard D1 video format: 720x576 */
+ SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
+ SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
+ SAA6752HS_VF_SIF = 3, /* SIF video format: 352x288 */
+ SAA6752HS_VF_UNKNOWN,
+};
+
+static const struct v4l2_format v4l2_format_table[] =
+{
+ [SAA6752HS_VF_D1] = {
+ .fmt = { .pix = { .width = 720, .height = 576 }, }, },
+ [SAA6752HS_VF_2_3_D1] = {
+ .fmt = { .pix = { .width = 480, .height = 576 }, }, },
+ [SAA6752HS_VF_1_2_D1] = {
+ .fmt = { .pix = { .width = 352, .height = 576 }, }, },
+ [SAA6752HS_VF_SIF] = {
+ .fmt = { .pix = { .width = 352, .height = 288 }, }, },
+ [SAA6752HS_VF_UNKNOWN] = {
+ .fmt = { .pix = { .width = 0, .height = 0 }, }, },
+};
+
+struct saa6752hs_state {
+ struct i2c_client client;
+ struct v4l2_mpeg_compression params;
+ enum saa6752hs_videoformat video_format;
+};
enum saa6752hs_command {
SAA6752HS_COMMAND_RESET = 0,
SAA6752HS_COMMAND_MAX
};
-
/* ---------------------------------------------------------------------- */
static u8 PAT[] = {
0x00, 0x01, // program_number(1)
- 0xe0, 0x10, // PMT PID(0x10)
+ 0xe0, 0x00, // PMT PID
- 0x76, 0xf1, 0x44, 0xd1 // CRC32
+ 0x00, 0x00, 0x00, 0x00 // CRC32
};
static u8 PMT[] = {
0x01, // table number for encoder
0x47, // sync
- 0x40, 0x10, // transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0x10)
+ 0x40, 0x00, // transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid
0x10, // transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0)
0x00, // PSI pointer to start of table
0x00, 0x00, // section_number(0), last_section_number(0)
- 0xe1, 0x04, // PCR_PID (0x104)
+ 0xe0, 0x00, // PCR_PID
0xf0, 0x00, // program_info_length(0)
- 0x02, 0xe1, 0x00, 0xf0, 0x00, // video stream type(2), pid(0x100)
- 0x04, 0xe1, 0x03, 0xf0, 0x00, // audio stream type(4), pid(0x103)
+ 0x02, 0xe0, 0x00, 0xf0, 0x00, // video stream type(2), pid
+ 0x04, 0xe0, 0x00, 0xf0, 0x00, // audio stream type(4), pid
- 0xa1, 0xca, 0x0f, 0x82 // CRC32
+ 0x00, 0x00, 0x00, 0x00 // CRC32
};
-static struct mpeg_params mpeg_params_template =
+static struct v4l2_mpeg_compression param_defaults =
{
- .bitrate_mode = MPEG_BITRATE_MODE_CBR,
- .video_target_bitrate = 5000,
- .audio_bitrate = MPEG_AUDIO_BITRATE_256,
- .total_bitrate = 6000,
+ .st_type = V4L2_MPEG_TS_2,
+ .st_bitrate = {
+ .mode = V4L2_BITRATE_CBR,
+ .target = 7000,
+ },
+
+ .ts_pid_pmt = 16,
+ .ts_pid_video = 260,
+ .ts_pid_audio = 256,
+ .ts_pid_pcr = 259,
+
+ .vi_type = V4L2_MPEG_VI_2,
+ .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
+ .vi_bitrate = {
+ .mode = V4L2_BITRATE_VBR,
+ .target = 4000,
+ .max = 6000,
+ },
+
+ .au_type = V4L2_MPEG_AU_2_II,
+ .au_bitrate = {
+ .mode = V4L2_BITRATE_CBR,
+ .target = 256,
+ },
+
+#if 0
+ /* FIXME: size? via S_FMT? */
+ .video_format = MPEG_VIDEO_FORMAT_D1,
+#endif
};
-
/* ---------------------------------------------------------------------- */
-
static int saa6752hs_chip_command(struct i2c_client* client,
enum saa6752hs_command command)
{
break;
case SAA6752HS_COMMAND_STOP:
- buf[0] = 0x03;
+ buf[0] = 0x03;
break;
case SAA6752HS_COMMAND_START:
static int saa6752hs_set_bitrate(struct i2c_client* client,
- struct mpeg_params* params)
+ struct v4l2_mpeg_compression* params)
{
u8 buf[3];
// set the bitrate mode
buf[0] = 0x71;
- buf[1] = params->bitrate_mode;
+ buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
i2c_master_send(client, buf, 2);
// set the video bitrate
- if (params->bitrate_mode == MPEG_BITRATE_MODE_VBR) {
+ if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
// set the target bitrate
buf[0] = 0x80;
- buf[1] = params->video_target_bitrate >> 8;
- buf[2] = params->video_target_bitrate & 0xff;
+ buf[1] = params->vi_bitrate.target >> 8;
+ buf[2] = params->vi_bitrate.target & 0xff;
i2c_master_send(client, buf, 3);
// set the max bitrate
buf[0] = 0x81;
- buf[1] = params->video_max_bitrate >> 8;
- buf[2] = params->video_max_bitrate & 0xff;
+ buf[1] = params->vi_bitrate.max >> 8;
+ buf[2] = params->vi_bitrate.max & 0xff;
i2c_master_send(client, buf, 3);
} else {
// set the target bitrate (no max bitrate for CBR)
buf[0] = 0x81;
- buf[1] = params->video_target_bitrate >> 8;
- buf[2] = params->video_target_bitrate & 0xff;
+ buf[1] = params->vi_bitrate.target >> 8;
+ buf[2] = params->vi_bitrate.target & 0xff;
i2c_master_send(client, buf, 3);
}
// set the audio bitrate
buf[0] = 0x94;
- buf[1] = params->audio_bitrate;
+ buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
i2c_master_send(client, buf, 2);
// set the total bitrate
buf[0] = 0xb1;
- buf[1] = params->total_bitrate >> 8;
- buf[2] = params->total_bitrate & 0xff;
+ buf[1] = params->st_bitrate.target >> 8;
+ buf[2] = params->st_bitrate.target & 0xff;
i2c_master_send(client, buf, 3);
+ // return success
return 0;
}
-
-static int saa6752hs_init(struct i2c_client* client, struct mpeg_params* params)
+static void saa6752hs_set_subsampling(struct i2c_client* client,
+ struct v4l2_format* f)
{
- unsigned char buf[3];
- void *data;
-
- // check the bitrate parameters first
- if (params != NULL) {
- if (params->bitrate_mode >= MPEG_BITRATE_MODE_MAX)
- return -EINVAL;
- if (params->video_target_bitrate >= MPEG_VIDEO_TARGET_BITRATE_MAX)
- return -EINVAL;
- if (params->video_max_bitrate >= MPEG_VIDEO_MAX_BITRATE_MAX)
- return -EINVAL;
- if (params->audio_bitrate >= MPEG_AUDIO_BITRATE_MAX)
- return -EINVAL;
- if (params->total_bitrate >= MPEG_TOTAL_BITRATE_MAX)
- return -EINVAL;
- if (params->bitrate_mode == MPEG_BITRATE_MODE_MAX &&
- params->video_target_bitrate <= params->video_max_bitrate)
- return -EINVAL;
+ struct saa6752hs_state *h = i2c_get_clientdata(client);
+ int dist_352, dist_480, dist_720;
+
+ /*
+ FIXME: translate and round width/height into EMPRESS
+ subsample type:
+
+ type | PAL | NTSC
+ ---------------------------
+ SIF | 352x288 | 352x240
+ 1/2 D1 | 352x576 | 352x480
+ 2/3 D1 | 480x576 | 480x480
+ D1 | 720x576 | 720x480
+ */
+
+ dist_352 = abs(f->fmt.pix.width - 352);
+ dist_480 = abs(f->fmt.pix.width - 480);
+ dist_720 = abs(f->fmt.pix.width - 720);
+ if (dist_720 < dist_480) {
+ f->fmt.pix.width = 720;
+ f->fmt.pix.height = 576;
+ h->video_format = SAA6752HS_VF_D1;
+ }
+ else if (dist_480 < dist_352) {
+ f->fmt.pix.width = 480;
+ f->fmt.pix.height = 576;
+ h->video_format = SAA6752HS_VF_2_3_D1;
}
+ else {
+ f->fmt.pix.width = 352;
+ if (abs(f->fmt.pix.height - 576) <
+ abs(f->fmt.pix.height - 288)) {
+ f->fmt.pix.height = 576;
+ h->video_format = SAA6752HS_VF_1_2_D1;
+ }
+ else {
+ f->fmt.pix.height = 288;
+ h->video_format = SAA6752HS_VF_SIF;
+ }
+ }
+}
+
+
+static void saa6752hs_set_params(struct i2c_client* client,
+ struct v4l2_mpeg_compression* params)
+{
+ struct saa6752hs_state *h = i2c_get_clientdata(client);
+
+ /* check PIDs */
+ if (params->ts_pid_pmt <= MPEG_PID_MAX)
+ h->params.ts_pid_pmt = params->ts_pid_pmt;
+ if (params->ts_pid_pcr <= MPEG_PID_MAX)
+ h->params.ts_pid_pcr = params->ts_pid_pcr;
+ if (params->ts_pid_video <= MPEG_PID_MAX)
+ h->params.ts_pid_video = params->ts_pid_video;
+ if (params->ts_pid_audio <= MPEG_PID_MAX)
+ h->params.ts_pid_audio = params->ts_pid_audio;
+
+ /* check bitrate parameters */
+ if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
+ (params->vi_bitrate.mode == V4L2_BITRATE_VBR))
+ h->params.vi_bitrate.mode = params->vi_bitrate.mode;
+ if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
+ h->params.st_bitrate.target = params->st_bitrate.target;
+ if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
+ h->params.vi_bitrate.target = params->vi_bitrate.target;
+ if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
+ h->params.vi_bitrate.max = params->vi_bitrate.max;
+ if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
+ h->params.au_bitrate.target = params->au_bitrate.target;
+
+ /* aspect ratio */
+ if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
+ params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
+ h->params.vi_aspect_ratio = params->vi_aspect_ratio;
+
+ /* range checks */
+ if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
+ h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
+ if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
+ h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
+ if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
+ h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
+ if (h->params.au_bitrate.target <= 256)
+ h->params.au_bitrate.target = 256;
+ else
+ h->params.au_bitrate.target = 384;
+}
+
+static int saa6752hs_init(struct i2c_client* client)
+{
+ unsigned char buf[9], buf2[4];
+ struct saa6752hs_state *h;
+ u32 crc;
+ unsigned char localPAT[256];
+ unsigned char localPMT[256];
+
+ h = i2c_get_clientdata(client);
- // Set GOP structure {3, 13}
+ // Set video format - must be done first as it resets other settings
+ buf[0] = 0x41;
+ buf[1] = h->video_format;
+ i2c_master_send(client, buf, 2);
+
+ // set bitrate
+ saa6752hs_set_bitrate(client, &h->params);
+
+ // Set GOP structure {3, 13}
buf[0] = 0x72;
buf[1] = 0x03;
buf[2] = 0x0D;
// Set Output Protocol
buf[0] = 0xD0;
- buf[1] = 0x01;
+ buf[1] = 0x81;
i2c_master_send(client,buf,2);
// Set video output stream format {TS}
buf[1] = 0x05;
i2c_master_send(client,buf,2);
- // Set Audio PID {0x103}
+ /* compute PAT */
+ memcpy(localPAT, PAT, sizeof(PAT));
+ localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
+ localPAT[18] = h->params.ts_pid_pmt & 0xff;
+ crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
+ localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
+ localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
+ localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
+ localPAT[sizeof(PAT) - 1] = crc & 0xFF;
+
+ /* compute PMT */
+ memcpy(localPMT, PMT, sizeof(PMT));
+ 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);
+ localPMT[16] = h->params.ts_pid_pcr & 0xFF;
+ localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
+ 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;
+
+ // Set Audio PID
buf[0] = 0xC1;
- buf[1] = 0x01;
- buf[2] = 0x03;
+ buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
+ buf[2] = h->params.ts_pid_audio & 0xFF;
i2c_master_send(client,buf,3);
- // setup bitrate settings
- data = i2c_get_clientdata(client);
- if (params) {
- saa6752hs_set_bitrate(client, params);
- memcpy(data, params, sizeof(struct mpeg_params));
- } else {
- // parameters were not supplied. use the previous set
- saa6752hs_set_bitrate(client, (struct mpeg_params*) data);
- }
+ // Set Video PID
+ buf[0] = 0xC0;
+ buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
+ buf[2] = h->params.ts_pid_video & 0xFF;
+ i2c_master_send(client,buf,3);
+
+ // Set PCR PID
+ buf[0] = 0xC4;
+ buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
+ buf[2] = h->params.ts_pid_pcr & 0xFF;
+ i2c_master_send(client,buf,3);
// Send SI tables
- i2c_master_send(client,PAT,sizeof(PAT));
- i2c_master_send(client,PMT,sizeof(PMT));
+ i2c_master_send(client,localPAT,sizeof(PAT));
+ i2c_master_send(client,localPMT,sizeof(PMT));
// mute then unmute audio. This removes buzzing artefacts
buf[0] = 0xa4;
// start it going
saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
+ // readout current state
+ buf[0] = 0xE1;
+ buf[1] = 0xA7;
+ buf[2] = 0xFE;
+ buf[3] = 0x82;
+ buf[4] = 0xB0;
+ i2c_master_send(client, buf, 5);
+ i2c_master_recv(client, buf2, 4);
+
+ // change aspect ratio
+ buf[0] = 0xE0;
+ buf[1] = 0xA7;
+ buf[2] = 0xFE;
+ buf[3] = 0x82;
+ buf[4] = 0xB0;
+ buf[5] = buf2[0];
+ switch(h->params.vi_aspect_ratio) {
+ case V4L2_MPEG_ASPECT_16_9:
+ buf[6] = buf2[1] | 0x40;
+ break;
+ case V4L2_MPEG_ASPECT_4_3:
+ default:
+ buf[6] = buf2[1] & 0xBF;
+ break;
+ break;
+ }
+ buf[7] = buf2[2];
+ buf[8] = buf2[3];
+ i2c_master_send(client, buf, 9);
+
+ // return success
return 0;
}
static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
{
- struct i2c_client *client;
- struct mpeg_params* params;
-
- client_template.adapter = adap;
- client_template.addr = addr;
+ struct saa6752hs_state *h;
printk("saa6752hs: chip found @ 0x%x\n", addr<<1);
- if (NULL == (client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL)))
+ if (NULL == (h = kmalloc(sizeof(*h), GFP_KERNEL)))
return -ENOMEM;
- memcpy(client,&client_template,sizeof(struct i2c_client));
- strlcpy(client->name, "saa6752hs", sizeof(client->name));
-
- if (NULL == (params = kmalloc(sizeof(struct mpeg_params), GFP_KERNEL)))
- return -ENOMEM;
- memcpy(params,&mpeg_params_template,sizeof(struct mpeg_params));
- i2c_set_clientdata(client, params);
-
- i2c_attach_client(client);
-
+ memset(h,0,sizeof(*h));
+ h->client = client_template;
+ h->params = param_defaults;
+ h->client.adapter = adap;
+ h->client.addr = addr;
+
+ i2c_set_clientdata(&h->client, h);
+ i2c_attach_client(&h->client);
return 0;
}
static int saa6752hs_detach(struct i2c_client *client)
{
- void *data;
+ struct saa6752hs_state *h;
- data = i2c_get_clientdata(client);
+ h = i2c_get_clientdata(client);
i2c_detach_client(client);
- kfree(data);
- kfree(client);
+ kfree(h);
return 0;
}
static int
saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
- struct mpeg_params* init_arg = arg;
+ struct saa6752hs_state *h = i2c_get_clientdata(client);
+ struct v4l2_mpeg_compression *params = arg;
+ int err = 0;
switch (cmd) {
- case MPEG_SETPARAMS:
- return saa6752hs_init(client, init_arg);
+ case VIDIOC_S_MPEGCOMP:
+ if (NULL == params) {
+ /* apply settings and start encoder */
+ saa6752hs_init(client);
+ break;
+ }
+ saa6752hs_set_params(client, params);
+ /* fall through */
+ case VIDIOC_G_MPEGCOMP:
+ *params = h->params;
+ break;
+ case VIDIOC_G_FMT:
+ {
+ struct v4l2_format *f = arg;
+
+ if (h->video_format == SAA6752HS_VF_UNKNOWN)
+ h->video_format = SAA6752HS_VF_D1;
+ f->fmt.pix.width =
+ v4l2_format_table[h->video_format].fmt.pix.width;
+ f->fmt.pix.height =
+ v4l2_format_table[h->video_format].fmt.pix.height;
+ break ;
+ }
+ case VIDIOC_S_FMT:
+ {
+ struct v4l2_format *f = arg;
+ saa6752hs_set_subsampling(client, f);
+ break;
+ }
default:
/* nothing */
break;
}
- return 0;
+ return err;
}
/* ----------------------------------------------------------------------- */
static struct i2c_client client_template =
{
- I2C_DEVNAME("(saa6752hs unset)"),
+ I2C_DEVNAME("saa6752hs"),
.flags = I2C_CLIENT_ALLOW_USE,
.driver = &driver,
};
git://git.onelab.eu / linux-2.6.git / blobdiff