output/{alsa,oss}: move endian code to new library pcm_export
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a5d1444ef4
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170635e3a6
@ -399,6 +399,7 @@ libutil_a_SOURCES = \
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libpcm_a_SOURCES = \
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src/pcm_buffer.c src/pcm_buffer.h \
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src/pcm_export.c src/pcm_export.h \
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src/pcm_convert.c src/pcm_convert.h \
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src/dsd2pcm/dsd2pcm.c src/dsd2pcm/dsd2pcm.h \
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src/pcm_dsd.c src/pcm_dsd.h \
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@ -21,8 +21,7 @@
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#include "alsa_output_plugin.h"
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#include "output_api.h"
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#include "mixer_list.h"
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#include "pcm_buffer.h"
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#include "pcm_byteswap.h"
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#include "pcm_export.h"
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#include <glib.h>
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#include <alsa/asoundlib.h>
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@ -47,12 +46,7 @@ typedef snd_pcm_sframes_t alsa_writei_t(snd_pcm_t * pcm, const void *buffer,
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struct alsa_data {
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struct audio_output base;
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/**
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* The buffer used to reverse the byte order.
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*
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* @see #reverse_endian
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*/
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struct pcm_buffer reverse_buffer;
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struct pcm_export_state export;
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/** the configured name of the ALSA device; NULL for the
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default device */
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@ -61,21 +55,6 @@ struct alsa_data {
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/** use memory mapped I/O? */
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bool use_mmap;
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/**
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* Does ALSA expect samples in reverse byte order? (i.e. not
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* host byte order)
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*
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* This attribute is only valid while the device is open.
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*/
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bool reverse_endian;
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/**
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* Which sample format is being sent to the play() method?
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*
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* This attribute is only valid while the device is open.
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*/
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enum sample_format sample_format;
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/** libasound's buffer_time setting (in microseconds) */
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unsigned int buffer_time;
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@ -196,7 +175,7 @@ alsa_output_enable(struct audio_output *ao, G_GNUC_UNUSED GError **error_r)
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{
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struct alsa_data *ad = (struct alsa_data *)ao;
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pcm_buffer_init(&ad->reverse_buffer);
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pcm_export_init(&ad->export);
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return true;
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}
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@ -205,7 +184,7 @@ alsa_output_disable(struct audio_output *ao)
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{
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struct alsa_data *ad = (struct alsa_data *)ao;
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pcm_buffer_deinit(&ad->reverse_buffer);
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pcm_export_deinit(&ad->export);
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}
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static bool
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@ -434,8 +413,9 @@ configure_hw:
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ad->writei = snd_pcm_writei;
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}
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bool reverse_endian;
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err = alsa_output_setup_format(ad->pcm, hwparams, audio_format,
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&ad->reverse_endian);
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&reverse_endian);
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if (err < 0) {
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g_set_error(error, alsa_output_quark(), err,
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"ALSA device \"%s\" does not support format %s: %s",
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@ -445,8 +425,6 @@ configure_hw:
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return false;
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}
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ad->sample_format = audio_format->format;
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err = snd_pcm_hw_params_set_channels_near(ad->pcm, hwparams,
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&channels);
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if (err < 0) {
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@ -579,6 +557,9 @@ configure_hw:
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ad->period_frames = alsa_period_size;
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ad->period_position = 0;
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pcm_export_open(&ad->export, audio_format->format,
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reverse_endian);
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return true;
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error:
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@ -710,9 +691,7 @@ alsa_play(struct audio_output *ao, const void *chunk, size_t size,
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{
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struct alsa_data *ad = (struct alsa_data *)ao;
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if (ad->reverse_endian)
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chunk = pcm_byteswap(&ad->reverse_buffer, ad->sample_format,
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chunk, size);
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chunk = pcm_export(&ad->export, chunk, size, &size);
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size /= ad->frame_size;
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@ -52,20 +52,14 @@
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#endif
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#ifdef AFMT_S24_PACKED
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#include "pcm_buffer.h"
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#include "pcm_byteswap.h"
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#include "pcm_export.h"
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#endif
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struct oss_data {
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struct audio_output base;
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#ifdef AFMT_S24_PACKED
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/**
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* The buffer used to reverse the byte order.
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*
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* @see #reverse_endian
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*/
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struct pcm_buffer reverse_buffer;
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struct pcm_export_state export;
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#endif
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int fd;
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@ -76,16 +70,6 @@ struct oss_data {
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* the device after cancel().
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*/
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struct audio_format audio_format;
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#ifdef AFMT_S24_PACKED
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/**
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* Does OSS expect samples in reverse byte order? (i.e. not
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* host byte order)
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*
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* This attribute is only valid while the device is open.
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*/
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bool reverse_endian;
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#endif
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};
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/**
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@ -252,7 +236,7 @@ oss_output_enable(struct audio_output *ao, G_GNUC_UNUSED GError **error_r)
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{
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struct oss_data *od = (struct oss_data *)ao;
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pcm_buffer_init(&od->reverse_buffer);
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pcm_export_init(&od->export);
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return true;
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}
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@ -261,7 +245,7 @@ oss_output_disable(struct audio_output *ao)
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{
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struct oss_data *od = (struct oss_data *)ao;
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pcm_buffer_deinit(&od->reverse_buffer);
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pcm_export_deinit(&od->export);
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}
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#endif
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@ -517,7 +501,7 @@ sample_format_from_oss(int format)
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static bool
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oss_setup_sample_format(int fd, struct audio_format *audio_format,
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#ifdef AFMT_S24_PACKED
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bool *reverse_endian_r,
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struct pcm_export_state *export,
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#endif
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GError **error_r)
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{
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@ -537,8 +521,9 @@ oss_setup_sample_format(int fd, struct audio_format *audio_format,
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audio_format->format = mpd_format;
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#ifdef AFMT_S24_PACKED
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*reverse_endian_r = oss_format == AFMT_S24_PACKED &&
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G_BYTE_ORDER != G_LITTLE_ENDIAN;
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pcm_export_open(export, mpd_format,
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oss_format == AFMT_S24_PACKED &&
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G_BYTE_ORDER != G_LITTLE_ENDIAN);
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#endif
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return true;
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@ -583,8 +568,9 @@ oss_setup_sample_format(int fd, struct audio_format *audio_format,
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audio_format->format = mpd_format;
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#ifdef AFMT_S24_PACKED
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*reverse_endian_r = oss_format == AFMT_S24_PACKED &&
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G_BYTE_ORDER != G_LITTLE_ENDIAN;
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pcm_export_open(export, mpd_format,
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oss_format == AFMT_S24_PACKED &&
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G_BYTE_ORDER != G_LITTLE_ENDIAN);
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#endif
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return true;
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@ -611,7 +597,7 @@ oss_setup(struct oss_data *od, struct audio_format *audio_format,
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oss_setup_sample_rate(od->fd, audio_format, error_r) &&
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oss_setup_sample_format(od->fd, audio_format,
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#ifdef AFMT_S24_PACKED
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&od->reverse_endian,
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&od->export,
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#endif
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error_r);
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}
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@ -726,10 +712,7 @@ oss_output_play(struct audio_output *ao, const void *chunk, size_t size,
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return 0;
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#ifdef AFMT_S24_PACKED
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if (od->reverse_endian)
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chunk = pcm_byteswap(&od->reverse_buffer,
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od->audio_format.format,
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chunk, size);
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chunk = pcm_export(&od->export, chunk, size, &size);
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#endif
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while (true) {
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54
src/pcm_export.c
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54
src/pcm_export.c
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@ -0,0 +1,54 @@
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/*
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* Copyright (C) 2003-2012 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "pcm_export.h"
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#include "pcm_byteswap.h"
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void
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pcm_export_init(struct pcm_export_state *state)
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{
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pcm_buffer_init(&state->reverse_buffer);
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}
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void pcm_export_deinit(struct pcm_export_state *state)
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{
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pcm_buffer_deinit(&state->reverse_buffer);
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}
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void
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pcm_export_open(struct pcm_export_state *state,
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enum sample_format sample_format,
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bool reverse_endian)
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{
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state->sample_format = sample_format;
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state->reverse_endian = reverse_endian;
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}
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const void *
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pcm_export(struct pcm_export_state *state, const void *data, size_t size,
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size_t *dest_size_r)
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{
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if (state->reverse_endian)
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data = pcm_byteswap(&state->reverse_buffer,
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state->sample_format, data, size);
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*dest_size_r = size;
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return data;
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}
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90
src/pcm_export.h
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90
src/pcm_export.h
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@ -0,0 +1,90 @@
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/*
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* Copyright (C) 2003-2012 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef PCM_EXPORT_H
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#define PCM_EXPORT_H
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#include "check.h"
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#include "pcm_buffer.h"
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#include "audio_format.h"
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#include <stdbool.h>
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struct audio_format;
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/**
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* An object that handles export of PCM samples to some instance
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* outside of MPD. It has a few more options to tweak the binary
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* representation which are not supported by the pcm_convert library.
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*/
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struct pcm_export_state {
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/**
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* The buffer used to reverse the byte order.
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*
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* @see #reverse_endian
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*/
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struct pcm_buffer reverse_buffer;
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enum sample_format sample_format;
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/**
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* Export the samples in reverse byte order?
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*/
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bool reverse_endian;
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};
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/**
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* Initialize a #pcm_export_state object.
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*/
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void
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pcm_export_init(struct pcm_export_state *state);
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/**
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* Deinitialize a #pcm_export_state object and free allocated memory.
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*/
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void
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pcm_export_deinit(struct pcm_export_state *state);
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/**
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* Open the #pcm_export_state object.
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*
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* There is no "close" method. This function may be called multiple
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* times to reuse the object, until pcm_export_deinit() is called.
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*
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* This function cannot fail.
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*/
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void
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pcm_export_open(struct pcm_export_state *state,
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enum sample_format sample_format,
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bool reverse_endian);
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/**
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* Export a PCM buffer.
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*
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* @param state an initialized and open pcm_export_state object
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* @param src the source PCM buffer
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* @param src_size the size of #src in bytes
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* @param dest_size_r returns the number of bytes of the destination buffer
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* @return the destination buffer (may be a pointer to the source buffer)
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*/
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const void *
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pcm_export(struct pcm_export_state *state, const void *src, size_t src_size,
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size_t *dest_size_r);
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#endif
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