diff options
Diffstat (limited to 'src/encoder.c')
| -rw-r--r-- | src/encoder.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/encoder.c b/src/encoder.c index f8a378d..b16ca7e 100644 --- a/src/encoder.c +++ b/src/encoder.c @@ -224,6 +224,51 @@ sstv_delete_encoder(void *ctx) } static sstv_error_t +sstv_encode_fax480_state_change(sstv_encoder_context_t *context) +{ + /* start communication */ + if (context->state == SSTV_ENCODER_STATE_VIS_STOP_BIT) { + context->state = SSTV_ENCODER_STATE_SYNC; + context->extra.scan.curr_line = 0; + FSK(context, context->descriptor.sync.time, context->descriptor.sync.freq); + return SSTV_OK; + } + + /* sync->y */ + if ((context->state == SSTV_ENCODER_STATE_SYNC) + || (context->state == SSTV_ENCODER_STATE_Y_SCAN + && context->extra.scan.curr_col < context->image.width)) + { + if (context->state == SSTV_ENCODER_STATE_SYNC) { + context->extra.scan.curr_col = 0; + } + + context->state = SSTV_ENCODER_STATE_Y_SCAN; + + uint32_t pix_offset = context->image.width * context->extra.scan.curr_line + context->extra.scan.curr_col; + uint8_t y = context->image.buffer[pix_offset]; + FSK_PIXEL(context, context->descriptor.pixel.time, y); + + context->extra.scan.curr_col ++; + return SSTV_OK; + } + + /* advance line (y->sync) */ + if ((context->state == SSTV_ENCODER_STATE_Y_SCAN) + && (context->extra.scan.curr_line < context->image.height-1)) + { + context->state = SSTV_ENCODER_STATE_SYNC; + context->extra.scan.curr_line ++; + FSK(context, context->descriptor.sync.time, context->descriptor.sync.freq); + return SSTV_OK; + } + + /* no more state changes, done */ + context->state = SSTV_ENCODER_STATE_END; + return SSTV_OK; +} + +static sstv_error_t sstv_encode_robot_bw_state_change(sstv_encoder_context_t *context) { return SSTV_OK; @@ -871,6 +916,10 @@ sstv_encode_state_change(sstv_encoder_context_t *context) /* call state change routine for specific mode */ switch (context->mode) { + /* Fax modes */ + case SSTV_MODE_FAX480: + return sstv_encode_fax480_state_change(context); + /* Robot modes */ case SSTV_MODE_ROBOT_BW8_R: case SSTV_MODE_ROBOT_BW8_G: |