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a2dp_sink_demo: write wav file without btstack_audio configured
This commit is contained in:
Milanka Ringwald
parent
1ba35d6a8d
commit
9045ed0099
@ -80,7 +80,7 @@
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#ifdef HAVE_POSIX_FILE_IO
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#include "wav_util.h"
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#define STORE_SBC_TO_SBC_FILE
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#define STORE_SBC_TO_WAV_FILE
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#define STORE_TO_WAV_FILE
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#endif
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#define NUM_CHANNELS 2
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@ -114,7 +114,7 @@ static int request_frames;
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#define STORE_FROM_PLAYBACK
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// WAV File
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#ifdef STORE_SBC_TO_WAV_FILE
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#ifdef STORE_TO_WAV_FILE
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static int frame_count = 0;
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static char * wav_filename = "avdtp_sink.wav";
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#endif
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@ -208,15 +208,15 @@ static btstack_resample_t resample_instance;
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* SDP records and register them with the SDP service.
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* You'll also need to register several packet handlers:
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* - a2dp_sink_packet_handler - handles events on stream connection status (established, released), the media codec configuration, and, the status of the stream itself (opened, paused, stopped).
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* - handle_l2cap_media_data_packet - used to receive streaming data. If HAVE_PORTAUDIO or STORE_SBC_TO_WAV_FILE directives (check btstack_config.h) are used, the SBC decoder will be used to decode the SBC data into PCM frames. The resulting PCM frames are then processed in the SBC Decoder callback.
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* - handle_l2cap_media_data_packet - used to receive streaming data. If STORE_TO_WAV_FILE directive (check btstack_config.h) is used, the SBC decoder will be used to decode the SBC data into PCM frames. The resulting PCM frames are then processed in the SBC Decoder callback.
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* - stdin_process callback - used to trigger AVRCP commands to the A2DP Source device, such are get now playing info, start, stop, volume control. Requires HAVE_BTSTACK_STDIN.
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* - avrcp_controller_packet_handler - used to receive answers for AVRCP commands,
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*
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* @text Note, currently only the SBC codec is supported.
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* If you want to store the audio data in a file, you'll need to define STORE_SBC_TO_WAV_FILE. The HAVE_PORTAUDIO directive indicates if the audio is played back via PortAudio.
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* If HAVE_PORTAUDIO or STORE_SBC_TO_WAV_FILE directives is defined, the SBC decoder needs to get initialized when a2dp_sink_packet_handler receives event A2DP_SUBEVENT_STREAM_STARTED.
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* If you want to store the audio data in a file, you'll need to define STORE_TO_WAV_FILE.
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* If STORE_TO_WAV_FILE directive is defined, the SBC decoder needs to get initialized when a2dp_sink_packet_handler receives event A2DP_SUBEVENT_STREAM_STARTED.
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* The initialization of the SBC decoder requires a callback that handles PCM data:
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* - handle_pcm_data - handles PCM audio frames. Here, they are stored a in wav file if STORE_SBC_TO_WAV_FILE is defined, and/or played using the PortAudio library if HAVE_PORTAUDIO is defined.
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* - handle_pcm_data - handles PCM audio frames. Here, they are stored a in wav file if STORE_TO_WAV_FILE is defined, and/or played using the audio library.
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*/
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/* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP Controller services */
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@ -285,7 +285,7 @@ static int a2dp_and_avrcp_setup(void){
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} else {
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printf("Audio playback supported.\n");
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}
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#ifdef STORE_SBC_TO_WAV_FILE
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#ifdef STORE_TO_WAV_FILE
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printf("Audio will be stored to \'%s\' file.\n", wav_filename);
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#endif
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#endif
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@ -294,15 +294,12 @@ static int a2dp_and_avrcp_setup(void){
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static void playback_handler(int16_t * buffer, uint16_t num_frames){
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#ifdef STORE_FROM_PLAYBACK
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#ifdef STORE_SBC_TO_WAV_FILE
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#ifdef STORE_TO_WAV_FILE
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int wav_samples = num_frames * NUM_CHANNELS;
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int16_t * wav_buffer = buffer;
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#endif
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#endif
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// called from lower-layer but guaranteed to be on main thread
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if (sbc_frame_size == 0){
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memset(buffer, 0, num_frames * BYTES_PER_FRAME);
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return;
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@ -324,11 +321,9 @@ static void playback_handler(int16_t * buffer, uint16_t num_frames){
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btstack_sbc_decoder_process_data(&state, 0, sbc_frame, sbc_frame_size);
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}
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#ifdef STORE_FROM_PLAYBACK
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#ifdef STORE_SBC_TO_WAV_FILE
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#ifdef STORE_TO_WAV_FILE
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wav_writer_write_int16(wav_samples, wav_buffer);
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#endif
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#endif
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}
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static void handle_pcm_data(int16_t * data, int num_frames, int num_channels, int sample_rate, void * context){
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@ -336,37 +331,24 @@ static void handle_pcm_data(int16_t * data, int num_frames, int num_channels, in
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UNUSED(context);
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UNUSED(num_channels); // must be stereo == 2
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#ifdef STORE_DECODED
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wav_writer_write_int16(num_frames * NUM_CHANNELS, data);
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const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance();
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if (!audio_sink){
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#ifdef STORE_TO_WAV_FILE
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wav_writer_write_int16(num_frames * NUM_CHANNELS, data);
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#endif
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return;
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}
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// resample into request buffer - add some additional space for resampling
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int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2
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uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_frames, output_buffer);
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#ifdef STORE_RESAMPLED
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#ifdef STORE_SBC_TO_WAV_FILE
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wav_writer_write_int16(resampled_frames * NUM_CHANNELS, output_buffer);
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frame_count++;
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#endif
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#endif
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const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance();
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if (!audio_sink) return;
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// store data in btstack_audio buffer first
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int frames_to_copy = btstack_min(resampled_frames, request_frames);
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memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME);
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request_frames -= frames_to_copy;
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request_buffer += frames_to_copy * NUM_CHANNELS;
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#ifdef STORE_BEFORE_PLAYBACK
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#ifdef STORE_SBC_TO_WAV_FILE
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wav_writer_write_int16(frames_to_copy * NUM_CHANNELS, output_buffer);
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frame_count++;
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#endif
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#endif
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// and rest in ring buffer
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int frames_to_store = resampled_frames - frames_to_copy;
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if (frames_to_store){
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@ -374,12 +356,6 @@ static void handle_pcm_data(int16_t * data, int num_frames, int num_channels, in
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if (status){
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printf("Error storing samples in PCM ring buffer!!!\n");
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}
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#ifdef STORE_BEFORE_PLAYBACK
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#ifdef STORE_SBC_TO_WAV_FILE
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wav_writer_write_int16(frames_to_store * NUM_CHANNELS, &output_buffer[frames_to_copy * NUM_CHANNELS]);
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frame_count++;
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#endif
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#endif
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}
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}
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@ -388,7 +364,7 @@ static int media_processing_init(avdtp_media_codec_configuration_sbc_t configura
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btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL);
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#ifdef STORE_SBC_TO_WAV_FILE
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#ifdef STORE_TO_WAV_FILE
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wav_writer_open(wav_filename, configuration.num_channels, configuration.sampling_frequency);
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#endif
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@ -437,7 +413,7 @@ static void media_processing_close(void){
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audio_stream_started = 0;
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sbc_frame_size = 0;
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#ifdef STORE_SBC_TO_WAV_FILE
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#ifdef STORE_TO_WAV_FILE
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wav_writer_close();
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int total_frames_nr = state.good_frames_nr + state.bad_frames_nr + state.zero_frames_nr;
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