diff options
Diffstat (limited to 'demos/modules/gaudio/play-vs1053/main.c')
| -rw-r--r-- | demos/modules/gaudio/play-vs1053/main.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/demos/modules/gaudio/play-vs1053/main.c b/demos/modules/gaudio/play-vs1053/main.c new file mode 100644 index 00000000..e0204cba --- /dev/null +++ b/demos/modules/gaudio/play-vs1053/main.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org> + * Copyright (c) 2012, 2013, Andrew Hannam aka inmarket + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the <organization> nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * This demo demonstrates the use of the GAUDOUT module to play a audio file of arbitrary format + * eg. WAV, MP3. It is designed to work only with intelligent codecs like the VS1053 that can interpret + * the audio data themselves. + * + */ +#include "gfx.h" + +/* Specify our timing parameters */ +#define MY_AUDIO_CHANNEL 0 /* Use channel 0 */ +#define MY_PLAY_FILE "allwrong.wav" + +/* + * Application entry point. + */ +int main(void) { + font_t font; + GFILE *f; + char *errmsg; + uint32_t toplay; + uint32_t len; + GDataBuffer *pd; + + // Initialise everything + gfxInit(); + errmsg = 0; + + // Any font will do + font = gdispOpenFont("*"); + + // Allocate audio buffers - 4 x 512 byte buffers. + // You may need to increase this for slower cpu's. + // You may be able to decrease this for low latency operating systems. + if (!gfxBufferAlloc(4, 512)) { + errmsg = "Err: No Memory"; + goto theend; + } + +repeatplay: + // Open the wave file + if (!(f = gfileOpen(MY_PLAY_FILE, "r"))) { + errmsg = "Err: Open WAV"; + goto theend; + } + + // Initialise the audio output device - bitrate is ignored + if (!gaudioPlayInit(MY_AUDIO_CHANNEL, 22000, GAUDIO_PLAY_FORMAT_FILE)) { + errmsg = "Err: Bad format/freq"; + goto theend; + } + + // Play the file + gdispDrawString(0, gdispGetHeight()/2, "Playing...", font, Yellow); + toplay = gfileGetSize(f); + while(toplay) { + // Get a buffer to put the data into + pd = gfxBufferGet(TIME_INFINITE); // This should never fail as we are waiting forever + + // How much data can we put in + len = toplay > pd->size ? pd->size : toplay; + pd->len = len; + toplay -= len; + + // Read the data + if (gfileRead(f, pd+1, len) != len) { + errmsg = "Err: Read fail"; + goto theend; + } + + gaudioPlay(pd); + } + gfileClose(f); + + // Wait for the play to finish + gaudioPlayWait(TIME_INFINITE); + gdispDrawString(0, gdispGetHeight()/2+10, "Done", font, Green); + + // Repeat the whole thing + gfxSleepMilliseconds(1500); + gdispClear(Black); + goto repeatplay; + + // The end +theend: + if (errmsg) + gdispDrawString(0, gdispGetHeight()/2, errmsg, font, Red); + + while(TRUE) + gfxSleepMilliseconds(1000); +} |