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Give playback engine better control over the codec. Codec simply follows commands and doesn't concern itself with audio state. Get track change notification in on the actual last buffer insert of the track because now audio simply waits for a track change notify from PCM on the last track and it must be sent reliably. This is still at an intermediate stage but works. Codecs and plugins become incompatible.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29387 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2011-02-23 14:31:13 +00:00
parent 43b38b71f5
commit 6510973223
17 changed files with 614 additions and 496 deletions
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21
apps/codecs.h
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@ -75,17 +75,16 @@
#define CODEC_ENC_MAGIC 0x52454E43 /* RENC */
/* increase this every time the api struct changes */
#define CODEC_API_VERSION 35
#define CODEC_API_VERSION 36
/* update this to latest version if a change to the api struct breaks
backwards compatibility (and please take the opportunity to sort in any
new function which are "waiting" at the end of the function table) */
#define CODEC_MIN_API_VERSION 35
#define CODEC_MIN_API_VERSION 36
/* codec return codes */
enum codec_status {
CODEC_OK = 0,
CODEC_USB_CONNECTED,
CODEC_ERROR = -1,
};
@ -106,13 +105,13 @@ struct codec_api {
/* Codec should periodically check if stop_codec is set to true.
In case it is, codec must return immediately */
bool stop_codec;
volatile bool stop_codec;
/* Codec should periodically check if new_track is non zero.
When it is, the codec should request a new track. */
int new_track;
volatile int new_track;
/* If seek_time != 0, codec should seek to that song position (in ms)
if codec supports seeking. */
long seek_time;
volatile long seek_time;
/* The dsp instance to be used for audio output */
struct dsp_config *dsp;
@ -145,8 +144,6 @@ struct codec_api {
track is available and changed. If return value is false,
codec should exit immediately with PLUGIN_OK status. */
bool (*request_next_track)(void);
/* Free the buffer area of the current codec after its loaded */
void (*discard_codec)(void);
void (*set_offset)(size_t value);
/* Configure different codec buffer parameters. */
@ -210,8 +207,6 @@ struct codec_api {
#endif
#ifdef HAVE_RECORDING
volatile bool stop_encoder;
volatile int enc_codec_loaded; /* <0=error, 0=pending, >0=ok */
void (*enc_get_inputs)(struct enc_inputs *inputs);
void (*enc_set_parameters)(struct enc_parameters *params);
struct enc_chunk_hdr * (*enc_get_chunk)(void);
@ -283,8 +278,10 @@ extern unsigned char plugin_end_addr[];
void codec_get_full_path(char *path, const char *codec_root_fn);
/* defined by the codec loader (codec.c) */
int codec_load_buf(unsigned int hid, struct codec_api *api);
int codec_load_file(const char* codec, struct codec_api *api);
void * codec_load_buf(int hid, struct codec_api *api);
void * codec_load_file(const char* codec, struct codec_api *api);
int codec_begin(void *handle);
void codec_close(void *handle);
/* defined by the codec */
enum codec_status codec_start(void);