diff options
Diffstat (limited to 'tinyDAV/src/audio/alsa/tdav_common_alsa.c')
| -rw-r--r-- | tinyDAV/src/audio/alsa/tdav_common_alsa.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/tinyDAV/src/audio/alsa/tdav_common_alsa.c b/tinyDAV/src/audio/alsa/tdav_common_alsa.c new file mode 100644 index 0000000..d1deec8 --- /dev/null +++ b/tinyDAV/src/audio/alsa/tdav_common_alsa.c @@ -0,0 +1,275 @@ +/* Copyright (C) 2014 Mamadou DIOP. +* +* This file is part of Open Source Doubango Framework. +* +* DOUBANGO is free software: you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* DOUBANGO is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with DOUBANGO. +*/ +#include "tinydav/audio/alsa/tdav_common_alsa.h" + +#if HAVE_ALSA_ASOUNDLIB_H + +#define ALSA_DEBUG_INFO(FMT, ...) TSK_DEBUG_INFO("[ALSA Common] " FMT, ##__VA_ARGS__) +#define ALSA_DEBUG_WARN(FMT, ...) TSK_DEBUG_WARN("[ALSA Common] " FMT, ##__VA_ARGS__) +#define ALSA_DEBUG_ERROR(FMT, ...) TSK_DEBUG_ERROR("[ALSA Common] " FMT, ##__VA_ARGS__) +#define ALSA_DEBUG_FATAL(FMT, ...) TSK_DEBUG_FATAL("[ALSA Common] " FMT, ##__VA_ARGS__) + +#define ALSA_PLAYBACK_PERIODS 6 + +int tdav_common_alsa_init(tdav_common_alsa_t* p_self) +{ + if (!p_self) { + ALSA_DEBUG_ERROR("Invalid parameter"); + return -1; + } + if (p_self->b_initialized) { + ALSA_DEBUG_WARN("Already initialized"); + return 0; + } + tsk_safeobj_init(p_self); + p_self->b_initialized = tsk_true; + return 0; +} + +int tdav_common_alsa_lock(tdav_common_alsa_t* p_self) +{ + if (!p_self) { + ALSA_DEBUG_ERROR("Invalid parameter"); + return -1; + } + return tsk_safeobj_lock(p_self); +} + +int tdav_common_alsa_unlock(tdav_common_alsa_t* p_self) +{ + if (!p_self) { + ALSA_DEBUG_ERROR("Invalid parameter"); + return -1; + } + return tsk_safeobj_unlock(p_self); +} + +int tdav_common_alsa_prepare(tdav_common_alsa_t* p_self, tsk_bool_t is_capture, int ptime, int channels, int sample_rate) +{ + int err = 0, val; + if (!p_self) { + ALSA_DEBUG_ERROR("Invalid parameter"); + return -1; + } + + tdav_common_alsa_lock(p_self); + + if (p_self->b_prepared) { + ALSA_DEBUG_WARN("Already prepared"); + goto bail; + } + if (!p_self->p_device_name) { + p_self->p_device_name = strdup("default"); + } + p_self->b_capture = is_capture; + + if ((err = snd_pcm_open(&p_self->p_handle, p_self->p_device_name, is_capture ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK, /*SND_PCM_NONBLOCK | SND_PCM_ASYNC*/0)) != 0) { + ALSA_DEBUG_ERROR("Failed to open audio device %s (%s)", p_self->p_device_name, snd_strerror(err)); + goto bail; + } + ALSA_DEBUG_INFO("device('%s') opened", p_self->p_device_name); + + if ((err = snd_pcm_hw_params_malloc(&p_self->p_params)) != 0) { + ALSA_DEBUG_ERROR("Failed to allocate hardware parameter structure(%s)", snd_strerror(err)); + goto bail; + } + + if ((err = snd_pcm_hw_params_any(p_self->p_handle, p_self->p_params)) < 0) { + ALSA_DEBUG_ERROR("Failed to initialize hardware parameter structure (device=%s, err=%s)", p_self->p_device_name, snd_strerror(err)); + goto bail; + } + + if ((err = snd_pcm_hw_params_set_access(p_self->p_handle, p_self->p_params, SND_PCM_ACCESS_RW_INTERLEAVED)) != 0) { + ALSA_DEBUG_ERROR("Failed to set access type (device=%s, err=%s)", p_self->p_device_name, snd_strerror(err)); + goto bail; + } + + if ((err = snd_pcm_hw_params_set_format(p_self->p_handle, p_self->p_params, SND_PCM_FORMAT_S16_LE)) != 0) { + ALSA_DEBUG_ERROR("Failed to set sample format (device=%s, err=%s)", p_self->p_device_name, snd_strerror(err)); + goto bail; + } + + val = sample_rate; + if ((err = snd_pcm_hw_params_set_rate_near(p_self->p_handle, p_self->p_params, &val, 0)) != 0) { + ALSA_DEBUG_ERROR("Failed to set sample rate (rate=%d, device=%s, err=%s)", p_self->sample_rate, p_self->p_device_name, snd_strerror(err)); + goto bail; + } + ALSA_DEBUG_INFO("sample_rate: req=%d, resp=%d", sample_rate, val); + p_self->sample_rate = val; + + val = channels; + if ((err = snd_pcm_hw_params_set_channels_near(p_self->p_handle, p_self->p_params, &val)) != 0) { + ALSA_DEBUG_ERROR("Failed to set channels (channels=%d, device=%s, err=%s)", p_self->channels, p_self->p_device_name, snd_strerror(err)); + goto bail; + } + ALSA_DEBUG_INFO("channels: req=%d, resp=%d", channels, val); + p_self->channels = val; + + if (!is_capture) { + unsigned int periods = ALSA_PLAYBACK_PERIODS; + snd_pcm_uframes_t periodSize = (ptime * p_self->sample_rate * p_self->channels) / 1000; + if ((err = snd_pcm_hw_params_set_periods_near(p_self->p_handle, p_self->p_params, &periods, 0)) != 0) { + ALSA_DEBUG_ERROR ("Failed to set periods (val=%u, device=%s, err=%s)", periods, p_self->p_device_name, snd_strerror(err)); + goto bail; + } + + snd_pcm_uframes_t bufferSize = (periodSize * periods); + if ((err = snd_pcm_hw_params_set_buffer_size(p_self->p_handle, p_self->p_params, bufferSize)) != 0) { + ALSA_DEBUG_ERROR ("Failed to set buffer size (val=%lu, device=%s, err=%s)", bufferSize, p_self->p_device_name, snd_strerror(err)); + goto bail; + } + ALSA_DEBUG_INFO("periods=%u, buffersize=%lu", periods, bufferSize); + } + + if ((err = snd_pcm_hw_params (p_self->p_handle, p_self->p_params)) != 0) { + ALSA_DEBUG_ERROR ("Failed to set parameters (channels=%d, rate=%d, device=%s, err=%s)", p_self->channels, p_self->sample_rate, p_self->p_device_name, snd_strerror(err)); + goto bail; + } + if ((err = snd_pcm_prepare(p_self->p_handle)) != 0) { + ALSA_DEBUG_ERROR ("Failed to prepare device (channels=%d, rate=%d, device=%s, err=%s)", p_self->channels, p_self->sample_rate, p_self->p_device_name, snd_strerror(err)); + goto bail; + } + + /*if (is_capture)*/ { + p_self->n_buff_size_in_bytes = (ptime * p_self->sample_rate * (2/*SND_PCM_FORMAT_S16_LE*/ * p_self->channels)) / 1000; + if (!(p_self->p_buff_ptr = tsk_realloc(p_self->p_buff_ptr, p_self->n_buff_size_in_bytes))) { + ALSA_DEBUG_ERROR("Failed to allocate buffer with size = %u", p_self->n_buff_size_in_bytes); + err = -4; + goto bail; + } + p_self->n_buff_size_in_samples = (p_self->n_buff_size_in_bytes >> 1/*SND_PCM_FORMAT_S16_LE*/); + ALSA_DEBUG_INFO("n_buff_size_in_bytes=%u", p_self->n_buff_size_in_bytes); + } + + ALSA_DEBUG_INFO("device('%s') prepared", p_self->p_device_name); + + // everything is OK + p_self->b_prepared = tsk_true; +bail: + if (err) { + tdav_common_alsa_unprepare(p_self); + } + tdav_common_alsa_unlock(p_self); + return err; + +} + +int tdav_common_alsa_unprepare(tdav_common_alsa_t* p_self) +{ + int err = 0; + if (!p_self) { + ALSA_DEBUG_ERROR("Invalid parameter"); + return -1; + } + + tdav_common_alsa_lock(p_self); + + if (p_self->b_started) { + ALSA_DEBUG_ERROR("Must stop the capture device before unpreparing"); + err = -2; + goto bail; + } + + if (p_self->p_params) { + snd_pcm_hw_params_free(p_self->p_params); + p_self->p_params = tsk_null; + } + if (p_self->p_handle) { + snd_pcm_close(p_self->p_handle); + p_self->p_handle = tsk_null; + } + p_self->b_prepared = tsk_false; + + ALSA_DEBUG_INFO("device('%s') unprepared", p_self->p_device_name); + +bail: + tdav_common_alsa_unlock(p_self); + return err; +} + +int tdav_common_alsa_start(tdav_common_alsa_t* p_self) +{ + int err = 0; + if (!p_self) { + ALSA_DEBUG_ERROR("Invalid parameter"); + return -1; + } + + tdav_common_alsa_lock(p_self); + + if (p_self->b_started) { + ALSA_DEBUG_WARN("Already started"); + err = - 3; + goto bail; + } + if (!p_self->b_prepared) { + ALSA_DEBUG_ERROR("Not prepared"); + err = -2; + goto bail; + } + + if ((err = snd_pcm_start(p_self->p_handle)) != 0) { + ALSA_DEBUG_ERROR ("Failed to start device (channels=%d, rate=%d, device=%s, err=%s)", p_self->channels, p_self->sample_rate, p_self->p_device_name, snd_strerror(err)); + goto bail; + } + + p_self->b_started = tsk_true; + ALSA_DEBUG_INFO("device('%s') started", p_self->p_device_name); +bail: + tdav_common_alsa_unlock(p_self); + return err; +} + +int tdav_common_alsa_stop(tdav_common_alsa_t* p_self) +{ + int err = 0; + if (!p_self) { + ALSA_DEBUG_ERROR("Invalid parameter"); + return -1; + } + + tdav_common_alsa_lock(p_self); + + if (p_self->b_started) { + p_self->b_started = tsk_false; + //err = snd_pcm_drain(p_self->p_handle); + ALSA_DEBUG_INFO("device('%s') stopped", p_self->p_device_name); + } + if (p_self->b_prepared) { + tdav_common_alsa_unprepare(p_self); + } +bail: + tdav_common_alsa_unlock(p_self); + return err; +} + +int tdav_common_alsa_deinit(tdav_common_alsa_t* p_self) +{ + if (p_self && p_self->b_initialized) { + tdav_common_alsa_stop(p_self); + tdav_common_alsa_unprepare(p_self); + TSK_FREE(p_self->p_device_name); + TSK_FREE(p_self->p_buff_ptr); + tsk_safeobj_deinit(p_self); + p_self->b_initialized = tsk_false; + } + return 0; +} + +#endif /* HAVE_ALSA_ASOUNDLIB_H */ + |
