pcmbuf cleanup
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23649 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jeffrey Goode
parent
3114f2c6db
commit
ba9280d5f4
3 changed files with 25 additions and 29 deletions
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@ -50,11 +50,14 @@
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#define PCMBUF_MIX_CHUNK 8192 /* This is the maximum size of one packet
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for mixing (crossfade or voice) */
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/* number of bytes played per second (sample rate * 2 channels * 2 bytes/sample) */
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#define BYTERATE (NATIVE_FREQUENCY * 4)
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#if MEMORYSIZE > 2
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/* Keep watermark high for iPods at least (2s) */
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#define PCMBUF_WATERMARK (NATIVE_FREQUENCY * 4 * 2)
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#define PCMBUF_WATERMARK (BYTERATE * 2)
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#else
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#define PCMBUF_WATERMARK (NATIVE_FREQUENCY * 1) /* 0.25 seconds */
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#define PCMBUF_WATERMARK (BYTERATE / 4) /* 0.25 seconds */
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#endif
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/* Structure we can use to queue pcm chunks in memory to be played
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@ -137,7 +140,7 @@ extern unsigned int codec_thread_id;
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#ifdef HAVE_CROSSFADE
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static void crossfade_start(void);
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static void write_to_crossfade(char *buf, size_t length);
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static void write_to_crossfade(size_t length);
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static void pcmbuf_finish_crossfade_enable(void);
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#endif
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@ -198,7 +201,7 @@ static void commit_chunk(bool flush_next_time)
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pcmbuf_play_start();
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}
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/* Let approximately one chunk of data playback */
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sleep(HZ*PCMBUF_TARGET_CHUNK/(NATIVE_FREQUENCY*4));
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sleep(HZ * PCMBUF_TARGET_CHUNK / BYTERATE);
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}
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/* commit the chunk */
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@ -398,7 +401,7 @@ void pcmbuf_write_complete(int count)
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size_t length = (size_t)(unsigned int)count << 2;
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#ifdef HAVE_CROSSFADE
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if (crossfade_active)
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write_to_crossfade(fadebuf, length);
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write_to_crossfade(length);
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else
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#endif
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{
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@ -441,7 +444,7 @@ static size_t get_next_required_pcmbuf_size(void)
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seconds += 2;
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#endif
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logf("pcmbuf len: %ld", (long)seconds);
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return seconds * (NATIVE_FREQUENCY*4); /* 2 channels + 2 bytes/sample */
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return seconds * BYTERATE;
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}
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/* Initialize the pcmbuffer the structure looks like this:
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@ -575,9 +578,9 @@ static void pcmbuf_pcm_callback(unsigned char** start, size_t* size)
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/* Take the finished chunk out of circulation */
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read_chunk = pcmbuf_current->link;
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/* if during a track transition, update the elapsed time */
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/* if during a track transition, update the elapsed time in ms */
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if (track_transition)
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audio_pcmbuf_position_callback(last_chunksize);
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audio_pcmbuf_position_callback(last_chunksize * 1000 / BYTERATE);
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/* if last chunk in the track, stop updates and notify audio thread */
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if (pcmbuf_current->end_of_track)
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@ -781,10 +784,8 @@ static void crossfade_start(void)
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crossfade_sample = 0;
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/* Get fade out info from settings. */
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fade_out_delay =
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NATIVE_FREQUENCY * global_settings.crossfade_fade_out_delay * 4;
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fade_out_rem =
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NATIVE_FREQUENCY * global_settings.crossfade_fade_out_duration * 4;
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fade_out_delay = global_settings.crossfade_fade_out_delay * BYTERATE;
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fade_out_rem = global_settings.crossfade_fade_out_duration * BYTERATE;
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crossfade_need = fade_out_delay + fade_out_rem;
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if (crossfade_rem > crossfade_need)
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@ -833,7 +834,7 @@ static void crossfade_start(void)
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while (fade_out_rem > 0)
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{
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/* Each 1/10 second of audio will have the same fade applied */
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size_t block_rem = MIN(NATIVE_FREQUENCY * 4 / 10, fade_out_rem);
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size_t block_rem = MIN(BYTERATE / 10, fade_out_rem);
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int factor = (fade_out_rem << 8) / total_fade_out;
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fade_out_rem -= block_rem;
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@ -848,12 +849,10 @@ static void crossfade_start(void)
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}
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/* Initialize fade-in counters */
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crossfade_fade_in_total =
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NATIVE_FREQUENCY * global_settings.crossfade_fade_in_duration * 4;
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crossfade_fade_in_total = global_settings.crossfade_fade_in_duration * BYTERATE;
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crossfade_fade_in_rem = crossfade_fade_in_total;
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fade_in_delay =
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NATIVE_FREQUENCY * global_settings.crossfade_fade_in_delay * 4;
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fade_in_delay = global_settings.crossfade_fade_in_delay * BYTERATE;
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/* Find the right chunk and sample to start fading in */
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fade_in_delay += crossfade_sample * 2;
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@ -862,10 +861,11 @@ static void crossfade_start(void)
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}
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/* Perform fade-in of new track */
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static void write_to_crossfade(char *buf, size_t length)
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static void write_to_crossfade(size_t length)
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{
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if (length)
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{
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char *buf = fadebuf;
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if (crossfade_fade_in_rem)
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{
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size_t samples;
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@ -941,7 +941,7 @@ static void pcmbuf_finish_crossfade_enable(void)
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pcmbuf_watermark = (crossfade_enabled && pcmbuf_size) ?
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/* If crossfading, try to keep the buffer full other than 1 second */
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(pcmbuf_size - (NATIVE_FREQUENCY * 4 * 1)) :
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(pcmbuf_size - BYTERATE) :
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/* Otherwise, just use the default */
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PCMBUF_WATERMARK;
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}
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@ -1038,7 +1038,7 @@ void pcmbuf_write_voice_complete(int count)
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{
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mix_chunk = read_chunk->link;
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/* Start 1/8s into the next chunk */
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pcmbuf_mix_sample = NATIVE_FREQUENCY * 4 / 16;
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pcmbuf_mix_sample = BYTERATE / 16;
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}
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if (!mix_chunk)
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@ -1142,9 +1142,7 @@ void pcmbuf_set_low_latency(bool state)
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unsigned long pcmbuf_get_latency(void)
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{
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/* Be careful how this calculation is rearranged, it's easy to overflow */
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size_t bytes = pcmbuf_unplayed_bytes + pcm_get_bytes_waiting();
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return bytes / 4 * 1000 / NATIVE_FREQUENCY;
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return (pcmbuf_unplayed_bytes + pcm_get_bytes_waiting()) * 1000 / BYTERATE;
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}
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#ifndef HAVE_HARDWARE_BEEP
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@ -1176,7 +1174,7 @@ void pcmbuf_beep(unsigned int frequency, size_t duration, int amplitude)
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return;
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/* Give 5ms clearance. */
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bufstart += NATIVE_FREQUENCY * 4 / 200;
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bufstart += BYTERATE / 200;
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#ifdef HAVE_PCM_DMA_ADDRESS
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/* Returned peak addresses are DMA addresses */
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@ -228,11 +228,9 @@ static void audio_stop_playback(void);
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"elapsed" value of the previous (to the codec, but current to the
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user/PCM/WPS) track, so that the progressbar reaches the end.
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During that transition, the WPS will display othertrack_id3. */
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void audio_pcmbuf_position_callback(size_t size)
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void audio_pcmbuf_position_callback(unsigned int time)
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{
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/* This is called from an ISR, so be quick */
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unsigned int time = size * 1000 / 4 / NATIVE_FREQUENCY +
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othertrack_id3->elapsed;
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time += othertrack_id3->elapsed;
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if (time >= othertrack_id3->length)
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{
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@ -71,7 +71,7 @@ enum
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};
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bool audio_restore_playback(int type); /* Restores the audio buffer to handle the requested playback */
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size_t audio_get_filebuflen(void);
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void audio_pcmbuf_position_callback(size_t size) ICODE_ATTR;
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void audio_pcmbuf_position_callback(unsigned int time) ICODE_ATTR;
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void audio_post_track_change(bool pcmbuf);
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int get_audio_hid(void);
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int *get_codec_hid(void);
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