Changeset 2174:19a693a12053 in roaraudio

Timestamp:

07/26/09 17:02:01 (15 years ago)

Author:

phi

Branch:

default

Phase:

public

Message:

started with the basic codec, need to do a lot more ;)

File:

• libroardsp/transcode.c (modified) (1 diff)

libroardsp/transcode.c

@@ -25 +25 @@
 #include "libroardsp.h"
 
+#define _FUNC(func) (state->entry->func)
+#define _CHECK_STATE() (!(state == NULL || state->entry == NULL))
+#define _CHECK_FUNC(func) (_CHECK_STATE() && _FUNC(func) != NULL)
+#define _CHECK_BASIC(func) if ( !_CHECK_FUNC(func) ) return -1
+#define _CHECK() if ( !_CHECK_STATE() ) return -1
+
+static struct roar_xcoder_entry g_xcoders[] = {
+ {ROAR_CODEC_ALAW,  roar_xcoder_dummy_inituninit, roar_xcoder_dummy_inituninit, roar_xcoder_dummy_packet_size_any,
+                     NULL, NULL}, 
+ {ROAR_CODEC_MULAW, roar_xcoder_dummy_inituninit, roar_xcoder_dummy_inituninit, roar_xcoder_dummy_packet_size_any,
+                     NULL, NULL}, 
+ {-1, NULL, NULL, NULL, NULL, NULL}
+};
+
+int roar_xcoder_init(struct roar_xcoder * state, int encoder, struct roar_audio_info * info, struct roar_vio_calls * vio);
+int roar_xcoder_set_backend(struct roar_xcoder * state, struct roar_vio_calls * vio) {
+ _CHECK();
+
+ if ( vio == NULL && state->backend != NULL )
+  return -1;
+
+ state->backend = vio;
+
+ return 0;
+}
+int roar_xcoder_packet_size(struct roar_xcoder * state, int samples) {
+ _CHECK_BASIC(packet_size);
+
+ state->packet_len = state->entry->packet_size(state, samples);
+
+ if ( state->packet_len == 0 ) {
+  if ( samples < 1 ) {
+   return ROAR_RATE_DEFAULT/100;
+  } else {
+   return samples;
+  }
+ }
+
+ return state->packet_len;
+}
+
+int roar_xcoder_close      (struct roar_xcoder * state) {
+ _CHECK_BASIC(uninit);
+
+
+ if ( state->iobuffer != NULL ) {
+  roar_xcoder_proc(state, NULL, 0); // try to flush
+  roar_buffer_free(state->iobuffer);
+ }
+
+ return _FUNC(uninit)(state);
+}
+
+int roar_xcoder_proc_packet(struct roar_xcoder * state, void * buf, size_t len);
+int roar_xcoder_proc       (struct roar_xcoder * state, void * buf, size_t len) {
+ return -1;
+}
+
+int roar_bixcoder_init(struct roar_bixcoder * state, struct roar_audio_info * info, struct roar_vio_calls * vio);
+int roar_bixcoder_packet_size (struct roar_bixcoder * state, int samples);
+int roar_bixcoder_close       (struct roar_bixcoder * state);
+int roar_bixcoder_read_packet (struct roar_bixcoder * state, void * buf, size_t len);
+int roar_bixcoder_read        (struct roar_bixcoder * state, void * buf, size_t len);
+int roar_bixcoder_write_packet(struct roar_bixcoder * state, void * buf, size_t len);
+int roar_bixcoder_write       (struct roar_bixcoder * state, void * buf, size_t len);
+
+// dummy functions used by some de/encoders:
+int roar_xcoder_dummy_inituninit(struct roar_xcoder * state) {
+ return 0;
+}
+
+int roar_xcoder_dummy_packet_size_any(struct roar_xcoder * state, int samples) {
+ // the case samples=-1/samples!=-1 based things are done in the general func
+ return 0;
+}
 
 //ll