diff options
Diffstat (limited to 'drivers/media/dvb/ttpci/av7110_ipack.c')
-rw-r--r-- | drivers/media/dvb/ttpci/av7110_ipack.c | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/drivers/media/dvb/ttpci/av7110_ipack.c b/drivers/media/dvb/ttpci/av7110_ipack.c new file mode 100644 index 00000000000..24664074188 --- /dev/null +++ b/drivers/media/dvb/ttpci/av7110_ipack.c @@ -0,0 +1,403 @@ +#include "dvb_filter.h" +#include "av7110_ipack.h" +#include <linux/string.h> /* for memcpy() */ +#include <linux/vmalloc.h> + + +void av7110_ipack_reset(struct ipack *p) +{ + p->found = 0; + p->cid = 0; + p->plength = 0; + p->flag1 = 0; + p->flag2 = 0; + p->hlength = 0; + p->mpeg = 0; + p->check = 0; + p->which = 0; + p->done = 0; + p->count = 0; +} + + +int av7110_ipack_init(struct ipack *p, int size, + void (*func)(u8 *buf, int size, void *priv)) +{ + if (!(p->buf = vmalloc(size*sizeof(u8)))) { + printk ("Couldn't allocate memory for ipack\n"); + return -ENOMEM; + } + p->size = size; + p->func = func; + p->repack_subids = 0; + av7110_ipack_reset(p); + return 0; +} + + +void av7110_ipack_free(struct ipack *p) +{ + vfree(p->buf); +} + + +static void send_ipack(struct ipack *p) +{ + int off; + struct dvb_audio_info ai; + int ac3_off = 0; + int streamid = 0; + int nframes = 0; + int f = 0; + + switch (p->mpeg) { + case 2: + if (p->count < 10) + return; + p->buf[3] = p->cid; + p->buf[4] = (u8)(((p->count - 6) & 0xff00) >> 8); + p->buf[5] = (u8)((p->count - 6) & 0x00ff); + if (p->repack_subids && p->cid == PRIVATE_STREAM1) { + off = 9 + p->buf[8]; + streamid = p->buf[off]; + if ((streamid & 0xf8) == 0x80) { + ai.off = 0; + ac3_off = ((p->buf[off + 2] << 8)| + p->buf[off + 3]); + if (ac3_off < p->count) + f = dvb_filter_get_ac3info(p->buf + off + 3 + ac3_off, + p->count - ac3_off, &ai, 0); + if (!f) { + nframes = (p->count - off - 3 - ac3_off) / + ai.framesize + 1; + p->buf[off + 2] = (ac3_off >> 8) & 0xff; + p->buf[off + 3] = (ac3_off) & 0xff; + p->buf[off + 1] = nframes; + ac3_off += nframes * ai.framesize - p->count; + } + } + } + p->func(p->buf, p->count, p->data); + + p->buf[6] = 0x80; + p->buf[7] = 0x00; + p->buf[8] = 0x00; + p->count = 9; + if (p->repack_subids && p->cid == PRIVATE_STREAM1 + && (streamid & 0xf8) == 0x80) { + p->count += 4; + p->buf[9] = streamid; + p->buf[10] = (ac3_off >> 8) & 0xff; + p->buf[11] = (ac3_off) & 0xff; + p->buf[12] = 0; + } + break; + + case 1: + if (p->count < 8) + return; + p->buf[3] = p->cid; + p->buf[4] = (u8)(((p->count - 6) & 0xff00) >> 8); + p->buf[5] = (u8)((p->count - 6) & 0x00ff); + p->func(p->buf, p->count, p->data); + + p->buf[6] = 0x0f; + p->count = 7; + break; + } +} + + +void av7110_ipack_flush(struct ipack *p) +{ + if (p->plength != MMAX_PLENGTH - 6 || p->found <= 6) + return; + p->plength = p->found - 6; + p->found = 0; + send_ipack(p); + av7110_ipack_reset(p); +} + + +static void write_ipack(struct ipack *p, const u8 *data, int count) +{ + u8 headr[3] = { 0x00, 0x00, 0x01 }; + + if (p->count < 6) { + memcpy(p->buf, headr, 3); + p->count = 6; + } + + if (p->count + count < p->size){ + memcpy(p->buf+p->count, data, count); + p->count += count; + } else { + int rest = p->size - p->count; + memcpy(p->buf+p->count, data, rest); + p->count += rest; + send_ipack(p); + if (count - rest > 0) + write_ipack(p, data + rest, count - rest); + } +} + + +int av7110_ipack_instant_repack (const u8 *buf, int count, struct ipack *p) +{ + int l; + int c = 0; + + while (c < count && (p->mpeg == 0 || + (p->mpeg == 1 && p->found < 7) || + (p->mpeg == 2 && p->found < 9)) + && (p->found < 5 || !p->done)) { + switch (p->found) { + case 0: + case 1: + if (buf[c] == 0x00) + p->found++; + else + p->found = 0; + c++; + break; + case 2: + if (buf[c] == 0x01) + p->found++; + else if (buf[c] == 0) + p->found = 2; + else + p->found = 0; + c++; + break; + case 3: + p->cid = 0; + switch (buf[c]) { + case PROG_STREAM_MAP: + case PRIVATE_STREAM2: + case PROG_STREAM_DIR: + case ECM_STREAM : + case EMM_STREAM : + case PADDING_STREAM : + case DSM_CC_STREAM : + case ISO13522_STREAM: + p->done = 1; + /* fall through */ + case PRIVATE_STREAM1: + case VIDEO_STREAM_S ... VIDEO_STREAM_E: + case AUDIO_STREAM_S ... AUDIO_STREAM_E: + p->found++; + p->cid = buf[c]; + c++; + break; + default: + p->found = 0; + break; + } + break; + + case 4: + if (count-c > 1) { + p->plen[0] = buf[c]; + c++; + p->plen[1] = buf[c]; + c++; + p->found += 2; + p->plength = (p->plen[0] << 8) | p->plen[1]; + } else { + p->plen[0] = buf[c]; + p->found++; + return count; + } + break; + case 5: + p->plen[1] = buf[c]; + c++; + p->found++; + p->plength = (p->plen[0] << 8) | p->plen[1]; + break; + case 6: + if (!p->done) { + p->flag1 = buf[c]; + c++; + p->found++; + if ((p->flag1 & 0xc0) == 0x80) + p->mpeg = 2; + else { + p->hlength = 0; + p->which = 0; + p->mpeg = 1; + p->flag2 = 0; + } + } + break; + + case 7: + if (!p->done && p->mpeg == 2) { + p->flag2 = buf[c]; + c++; + p->found++; + } + break; + + case 8: + if (!p->done && p->mpeg == 2) { + p->hlength = buf[c]; + c++; + p->found++; + } + break; + } + } + + if (c == count) + return count; + + if (!p->plength) + p->plength = MMAX_PLENGTH - 6; + + if (p->done || ((p->mpeg == 2 && p->found >= 9) || + (p->mpeg == 1 && p->found >= 7))) { + switch (p->cid) { + case AUDIO_STREAM_S ... AUDIO_STREAM_E: + case VIDEO_STREAM_S ... VIDEO_STREAM_E: + case PRIVATE_STREAM1: + if (p->mpeg == 2 && p->found == 9) { + write_ipack(p, &p->flag1, 1); + write_ipack(p, &p->flag2, 1); + write_ipack(p, &p->hlength, 1); + } + + if (p->mpeg == 1 && p->found == 7) + write_ipack(p, &p->flag1, 1); + + if (p->mpeg == 2 && (p->flag2 & PTS_ONLY) && + p->found < 14) { + while (c < count && p->found < 14) { + p->pts[p->found - 9] = buf[c]; + write_ipack(p, buf + c, 1); + c++; + p->found++; + } + if (c == count) + return count; + } + + if (p->mpeg == 1 && p->which < 2000) { + + if (p->found == 7) { + p->check = p->flag1; + p->hlength = 1; + } + + while (!p->which && c < count && + p->check == 0xff){ + p->check = buf[c]; + write_ipack(p, buf + c, 1); + c++; + p->found++; + p->hlength++; + } + + if (c == count) + return count; + + if ((p->check & 0xc0) == 0x40 && !p->which) { + p->check = buf[c]; + write_ipack(p, buf + c, 1); + c++; + p->found++; + p->hlength++; + + p->which = 1; + if (c == count) + return count; + p->check = buf[c]; + write_ipack(p, buf + c, 1); + c++; + p->found++; + p->hlength++; + p->which = 2; + if (c == count) + return count; + } + + if (p->which == 1) { + p->check = buf[c]; + write_ipack(p, buf + c, 1); + c++; + p->found++; + p->hlength++; + p->which = 2; + if (c == count) + return count; + } + + if ((p->check & 0x30) && p->check != 0xff) { + p->flag2 = (p->check & 0xf0) << 2; + p->pts[0] = p->check; + p->which = 3; + } + + if (c == count) + return count; + if (p->which > 2){ + if ((p->flag2 & PTS_DTS_FLAGS) == PTS_ONLY) { + while (c < count && p->which < 7) { + p->pts[p->which - 2] = buf[c]; + write_ipack(p, buf + c, 1); + c++; + p->found++; + p->which++; + p->hlength++; + } + if (c == count) + return count; + } else if ((p->flag2 & PTS_DTS_FLAGS) == PTS_DTS) { + while (c < count && p->which < 12) { + if (p->which < 7) + p->pts[p->which - 2] = buf[c]; + write_ipack(p, buf + c, 1); + c++; + p->found++; + p->which++; + p->hlength++; + } + if (c == count) + return count; + } + p->which = 2000; + } + + } + + while (c < count && p->found < p->plength + 6) { + l = count - c; + if (l + p->found > p->plength + 6) + l = p->plength + 6 - p->found; + write_ipack(p, buf + c, l); + p->found += l; + c += l; + } + break; + } + + + if (p->done) { + if (p->found + count - c < p->plength + 6) { + p->found += count - c; + c = count; + } else { + c += p->plength + 6 - p->found; + p->found = p->plength + 6; + } + } + + if (p->plength && p->found == p->plength + 6) { + send_ipack(p); + av7110_ipack_reset(p); + if (c < count) + av7110_ipack_instant_repack(buf + c, count - c, p); + } + } + return count; +} |