diff options
Diffstat (limited to 'sys/oss4/oss4-audio.c')
| -rw-r--r-- | sys/oss4/oss4-audio.c | 721 |
1 files changed, 721 insertions, 0 deletions
diff --git a/sys/oss4/oss4-audio.c b/sys/oss4/oss4-audio.c new file mode 100644 index 00000000..a2404cc8 --- /dev/null +++ b/sys/oss4/oss4-audio.c @@ -0,0 +1,721 @@ +/* GStreamer OSS4 audio plugin + * Copyright (C) 2007-2008 Tim-Philipp Müller <tim centricular net> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <string.h> + +#include "gst/gst-i18n-plugin.h" +#include <gst/audio/multichannel.h> + +#include "oss4-audio.h" +#include "oss4-mixer.h" +#include "oss4-property-probe.h" +#include "oss4-sink.h" +#include "oss4-source.h" +#include "oss4-soundcard.h" + +GST_DEBUG_CATEGORY (oss4mixer_debug); +GST_DEBUG_CATEGORY (oss4sink_debug); +GST_DEBUG_CATEGORY (oss4src_debug); +GST_DEBUG_CATEGORY (oss4_debug); + +#define GST_CAT_DEFAULT oss4_debug + +static const struct +{ + const GstBufferFormat gst_fmt; + const gint oss_fmt; + const gchar name[16]; + const gint depth; + const gint width; + const gint endianness; + const gboolean signedness; +} fmt_map[] = { + /* note: keep sorted by preference, prefered formats first */ + { + GST_MU_LAW, AFMT_MU_LAW, "audio/x-mulaw", 0, 0, 0, FALSE}, { + GST_A_LAW, AFMT_A_LAW, "audio/x-alaw", 0, 0, 0, FALSE}, { + GST_S32_LE, AFMT_S32_LE, "audio/x-raw-int", 32, 32, G_LITTLE_ENDIAN, TRUE}, { + GST_S32_BE, AFMT_S32_BE, "audio/x-raw-int", 32, 32, G_BIG_ENDIAN, TRUE}, { + GST_S24_LE, AFMT_S24_LE, "audio/x-raw-int", 24, 32, G_LITTLE_ENDIAN, TRUE}, { + GST_S24_BE, AFMT_S24_BE, "audio/x-raw-int", 24, 32, G_BIG_ENDIAN, TRUE}, { + GST_S24_3LE, AFMT_S24_PACKED, "audio/x-raw-int", 24, 24, G_LITTLE_ENDIAN, + TRUE}, { + GST_S16_LE, AFMT_S16_LE, "audio/x-raw-int", 16, 16, G_LITTLE_ENDIAN, TRUE}, { + GST_S16_BE, AFMT_S16_BE, "audio/x-raw-int", 16, 16, G_BIG_ENDIAN, TRUE}, { + GST_U16_LE, AFMT_U16_LE, "audio/x-raw-int", 16, 16, G_LITTLE_ENDIAN, FALSE}, { + GST_U16_BE, AFMT_U16_BE, "audio/x-raw-int", 16, 16, G_BIG_ENDIAN, FALSE}, { + GST_S8, AFMT_S8, "audio/x-raw-int", 8, 8, 0, TRUE}, { + GST_U8, AFMT_U8, "audio/x-raw-int", 8, 8, 0, FALSE} +}; + +static gboolean +gst_oss4_append_format_to_caps (gint fmt, GstCaps * caps) +{ + gint i; + + for (i = 0; i < G_N_ELEMENTS (fmt_map); ++i) { + if (fmt_map[i].oss_fmt == fmt) { + GstStructure *s; + + s = gst_structure_empty_new (fmt_map[i].name); + if (fmt_map[i].width != 0 && fmt_map[i].depth != 0) { + gst_structure_set (s, "width", G_TYPE_INT, fmt_map[i].width, + "depth", G_TYPE_INT, fmt_map[i].depth, "endianness", G_TYPE_INT, + fmt_map[i].endianness, "signed", G_TYPE_BOOLEAN, + fmt_map[i].signedness, NULL); + } + gst_caps_append_structure (caps, s); + return TRUE; + } + } + return FALSE; +} + +static gint +gst_oss4_audio_get_oss_format (GstBufferFormat fmt) +{ + guint i; + + for (i = 0; i < G_N_ELEMENTS (fmt_map); ++i) { + if (fmt_map[i].gst_fmt == fmt) + return fmt_map[i].oss_fmt; + } + return 0; +} + +/* These are pretty random */ +#define GST_OSS4_MIN_SAMPLE_RATE 1 +#define GST_OSS4_MAX_SAMPLE_RATE 192000 + +static gboolean +gst_oss4_audio_detect_rates (GstObject * obj, oss_audioinfo * ai, + GstCaps * caps) +{ + GValue val = { 0, }; + int minrate, maxrate, i; + + minrate = ai->min_rate; + maxrate = ai->max_rate; + + /* sanity check */ + if (minrate > maxrate) { + GST_WARNING_OBJECT (obj, "min_rate %d > max_rate %d (buggy driver?)", + minrate, maxrate); + maxrate = ai->min_rate; /* swap */ + minrate = ai->max_rate; + } + + /* limit to something sensible */ + if (minrate < GST_OSS4_MIN_SAMPLE_RATE) + minrate = GST_OSS4_MIN_SAMPLE_RATE; + if (maxrate > GST_OSS4_MAX_SAMPLE_RATE) + maxrate = GST_OSS4_MAX_SAMPLE_RATE; + + if (maxrate < GST_OSS4_MIN_SAMPLE_RATE) { + GST_WARNING_OBJECT (obj, "max_rate < %d, which makes no sense", + GST_OSS4_MIN_SAMPLE_RATE); + return FALSE; + } + + GST_LOG_OBJECT (obj, "min_rate %d, max_rate %d (originally: %d, %d)", + minrate, maxrate, ai->min_rate, ai->max_rate); + + if ((ai->caps & PCM_CAP_FREERATE)) { + GST_LOG_OBJECT (obj, "device supports any sample rate between min and max"); + if (minrate == maxrate) { + g_value_init (&val, G_TYPE_INT); + g_value_set_int (&val, maxrate); + } else { + g_value_init (&val, GST_TYPE_INT_RANGE); + gst_value_set_int_range (&val, minrate, maxrate); + } + } else { + GST_LOG_OBJECT (obj, "%d sample rates:", ai->nrates); + g_value_init (&val, GST_TYPE_LIST); + for (i = 0; i < ai->nrates; ++i) { + GST_LOG_OBJECT (obj, " rate: %d", ai->rates[i]); + + if (ai->rates[i] >= minrate && ai->rates[i] <= maxrate) { + GValue rate_val = { 0, }; + + g_value_init (&rate_val, G_TYPE_INT); + g_value_set_int (&rate_val, ai->rates[i]); + gst_value_list_append_value (&val, &rate_val); + g_value_unset (&rate_val); + } + } + + if (gst_value_list_get_size (&val) == 0) { + g_value_unset (&val); + return FALSE; + } + } + + for (i = 0; i < gst_caps_get_size (caps); ++i) { + GstStructure *s; + + s = gst_caps_get_structure (caps, i); + gst_structure_set_value (s, "rate", &val); + } + + g_value_unset (&val); + + return TRUE; +} + +static void +gst_oss4_audio_add_channel_layout (GstObject * obj, guint64 layout, + guint num_channels, GstStructure * s) +{ + const GstAudioChannelPosition pos_map[16] = { + GST_AUDIO_CHANNEL_POSITION_NONE, /* 0 = dunno */ + GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, /* 1 = left */ + GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, /* 2 = right */ + GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, /* 3 = center */ + GST_AUDIO_CHANNEL_POSITION_LFE, /* 4 = lfe */ + GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, /* 5 = left surround */ + GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT, /* 6 = right surround */ + GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, /* 7 = left rear */ + GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, /* 8 = right rear */ + GST_AUDIO_CHANNEL_POSITION_NONE, + GST_AUDIO_CHANNEL_POSITION_NONE, + GST_AUDIO_CHANNEL_POSITION_NONE, + GST_AUDIO_CHANNEL_POSITION_NONE, + GST_AUDIO_CHANNEL_POSITION_NONE, + GST_AUDIO_CHANNEL_POSITION_NONE, + GST_AUDIO_CHANNEL_POSITION_NONE + }; + GstAudioChannelPosition ch_layout[8] = { 0, }; + guint speaker_pos; /* speaker position as defined by OSS */ + guint i; + + g_return_if_fail (num_channels <= G_N_ELEMENTS (ch_layout)); + + for (i = 0; i < num_channels; ++i) { + /* layout contains up to 16 speaker positions, with each taking up 4 bits */ + speaker_pos = (guint) ((layout >> (i * 4)) & 0x0f); + + /* if it's a channel position that's unknown to us, set all to NONE and + * bail out */ + if (G_UNLIKELY (pos_map[speaker_pos] == GST_AUDIO_CHANNEL_POSITION_NONE)) + goto no_layout; + + ch_layout[i] = pos_map[speaker_pos]; + } + gst_audio_set_channel_positions (s, ch_layout); + return; + +no_layout: + { + /* only warn if it's really unknown, position 0 is ok and represents NONE + * (in which case we also just set all others to NONE ignoring the other + * positions in the OSS-given layout, because that's what we currently + * require in GStreamer) */ + if (speaker_pos != 0) { + GST_WARNING_OBJECT (obj, "unknown OSS channel position %x", ch_layout[i]); + } + for (i = 0; i < num_channels; ++i) { + ch_layout[i] = GST_AUDIO_CHANNEL_POSITION_NONE; + } + gst_audio_set_channel_positions (s, ch_layout); + return; + } +} + +/* arbitrary max. limit */ +#define GST_OSS4_MIN_CHANNELS 1 +#define GST_OSS4_MAX_CHANNELS 4096 + +/* takes ownership of the input caps */ +static GstCaps * +gst_oss4_audio_detect_channels (GstObject * obj, int fd, oss_audioinfo * ai, + GstCaps * in_caps) +{ + const gchar *forced_layout; + GstStructure *s = NULL; + guint64 layout = 0; + GstCaps *chan_caps = NULL; + GstCaps *out_caps = NULL; + int minchans, maxchans; + int c, i, j; + + /* GST_OSS4_CHANNEL_LAYOUT environment variable: may be used to force a + * particular channel layout (if it contains an odd number of channel + * positions it will also make us advertise a channel layout for that + * channel count, even if we'd usually skip it; this is especially useful + * for folks with 2.1 speakers, I guess) */ + forced_layout = g_getenv ("GST_OSS4_CHANNEL_LAYOUT"); + + minchans = ai->min_channels; + maxchans = ai->max_channels; + + /* sanity check */ + if (minchans > maxchans) { + GST_WARNING_OBJECT (obj, "min_chans %d > max_chans %d (buggy driver?)", + minchans, maxchans); + maxchans = ai->min_channels; /* swap */ + minchans = ai->max_channels; + } + + /* limit to something sensible */ + if (minchans < GST_OSS4_MIN_CHANNELS) + minchans = GST_OSS4_MIN_CHANNELS; + if (maxchans > GST_OSS4_MAX_CHANNELS) + maxchans = GST_OSS4_MAX_CHANNELS; + + if (maxchans < GST_OSS4_MIN_CHANNELS) { + GST_WARNING_OBJECT (obj, "max_chans < %d, which makes no sense", + GST_OSS4_MIN_CHANNELS); + gst_caps_unref (in_caps); + return NULL; + } + + GST_LOG_OBJECT (obj, "min_channels %d, max_channels %d (originally: %d, %d)", + minchans, maxchans, ai->min_channels, ai->max_channels); + + chan_caps = gst_caps_new_empty (); + + /* first do the simple cases: mono + stereo (channel layout implied) */ + if (minchans == 1 && maxchans == 1) + s = gst_structure_new ("x", "channels", G_TYPE_INT, 1, NULL); + else if (minchans == 2 && maxchans >= 2) + s = gst_structure_new ("x", "channels", G_TYPE_INT, 2, NULL); + else if (minchans == 1 && maxchans >= 2) + s = gst_structure_new ("x", "channels", GST_TYPE_INT_RANGE, 1, 2, NULL); + gst_caps_append_structure (chan_caps, s); + s = NULL; + + /* TODO: we assume all drivers use a left/right layout for stereo here */ + if (maxchans <= 2) + goto done; + + if (ioctl (fd, SNDCTL_DSP_GET_CHNORDER, &layout) == -1) { + GST_WARNING_OBJECT (obj, "couldn't query channel layout, assuming default"); + layout = CHNORDER_NORMAL; + } + GST_DEBUG_OBJECT (obj, "channel layout: %08" G_GINT64_MODIFIER "x", layout); + + /* e.g. forced 2.1 layout would be GST_OSS4_CHANNEL_LAYOUT=421 */ + if (forced_layout != NULL && *forced_layout != '\0') { + guint layout_len; + + layout_len = strlen (forced_layout); + if (layout_len >= minchans && layout_len <= maxchans) { + layout = g_ascii_strtoull (forced_layout, NULL, 16); + maxchans = layout_len; + GST_DEBUG_OBJECT (obj, "forced channel layout: %08" G_GINT64_MODIFIER "x" + " ('%s'), maxchans now %d", layout, forced_layout, maxchans); + } else { + GST_WARNING_OBJECT (obj, "ignoring forced channel layout: layout has %d " + "channel positions but maxchans is %d", layout_len, maxchans); + } + } + + /* need to advertise channel layouts for anything >2 and <=8 channels */ + for (c = MAX (3, minchans); c <= MIN (maxchans, 8); c++) { + /* "The min_channels and max_channels fields define the limits for the + * number of channels. However some devices don't support all channels + * within this range. It's possible that the odd values (3, 5, 7, 9, etc). + * are not supported. There is currently no way to check for this other + * than checking if SNDCTL_DSP_CHANNELS accepts the requested value. + * Another approach is trying to avoid using odd number of channels." + * + * So, we don't know for sure if these odd values are supported: + */ + if ((c == 3 || c == 5 || c == 7) && (c != maxchans)) { + GST_LOG_OBJECT (obj, "not adding layout with %d channels", c); + continue; + } + + s = gst_structure_new ("x", "channels", G_TYPE_INT, c, NULL); + gst_oss4_audio_add_channel_layout (obj, layout, c, s); + GST_LOG_OBJECT (obj, "c=%u, appending struct %" GST_PTR_FORMAT, c, s); + gst_caps_append_structure (chan_caps, s); + s = NULL; + } + + if (maxchans <= 8) + goto done; + + /* for everything >8 channels, CHANNEL_POSITION_NONE is implied. */ + if (minchans == maxchans || maxchans == 9) { + s = gst_structure_new ("x", "channels", G_TYPE_INT, maxchans, NULL); + } else { + s = gst_structure_new ("x", "channels", GST_TYPE_INT_RANGE, + MAX (9, minchans), maxchans, NULL); + } + gst_caps_append_structure (chan_caps, s); + s = NULL; + +done: + + GST_LOG_OBJECT (obj, "channel structures: %" GST_PTR_FORMAT, chan_caps); + + out_caps = gst_caps_new_empty (); + + /* combine each structure in the input caps with each channel caps struct */ + for (i = 0; i < gst_caps_get_size (in_caps); ++i) { + const GstStructure *in_s; + + in_s = gst_caps_get_structure (in_caps, i); + + for (j = 0; j < gst_caps_get_size (chan_caps); ++j) { + const GstStructure *chan_s; + const GValue *val; + + s = gst_structure_copy (in_s); + chan_s = gst_caps_get_structure (chan_caps, j); + if ((val = gst_structure_get_value (chan_s, "channels"))) + gst_structure_set_value (s, "channels", val); + if ((val = gst_structure_get_value (chan_s, "channel-positions"))) + gst_structure_set_value (s, "channel-positions", val); + + gst_caps_append_structure (out_caps, s); + s = NULL; + } + } + + gst_caps_unref (in_caps); + gst_caps_unref (chan_caps); + return out_caps; +} + +GstCaps * +gst_oss4_audio_probe_caps (GstObject * obj, int fd) +{ + oss_audioinfo ai = { 0, }; + gboolean output; + GstCaps *caps; + int formats, i; + + output = GST_IS_OSS4_SINK (obj); + + /* -1 = get info for currently open device (fd). This will fail with + * OSS build <= 1013 because of a bug in OSS */ + ai.dev = -1; + if (ioctl (fd, SNDCTL_ENGINEINFO, &ai) == -1) + goto engineinfo_failed; + + formats = (output) ? ai.oformats : ai.iformats; + + GST_LOG_OBJECT (obj, "%s formats : 0x%08x", (output) ? "out" : "in", formats); + + caps = gst_caps_new_empty (); + + for (i = 0; i < G_N_ELEMENTS (fmt_map); ++i) { + if ((formats & fmt_map[i].oss_fmt)) { + gst_oss4_append_format_to_caps (fmt_map[i].oss_fmt, caps); + } + } + + gst_caps_do_simplify (caps); + GST_LOG_OBJECT (obj, "formats: %" GST_PTR_FORMAT, caps); + + if (!gst_oss4_audio_detect_rates (obj, &ai, caps)) + goto detect_rates_failed; + + caps = gst_oss4_audio_detect_channels (obj, fd, &ai, caps); + if (caps == NULL) + goto detect_channels_failed; + + GST_LOG_OBJECT (obj, "probed caps: %" GST_PTR_FORMAT, caps); + + return caps; + +/* ERRORS */ +engineinfo_failed: + { + GST_WARNING ("ENGINEINFO supported formats probe failed: %s", + g_strerror (errno)); + return NULL; + } +detect_rates_failed: + { + GST_WARNING_OBJECT (obj, "failed to detect supported sample rates"); + gst_caps_unref (caps); + return NULL; + } +detect_channels_failed: + { + GST_WARNING_OBJECT (obj, "failed to detect supported channels"); + gst_caps_unref (caps); + return NULL; + } +} + +GstCaps * +gst_oss4_audio_get_template_caps (void) +{ + GstCaps *caps; + gint i; + + caps = gst_caps_new_empty (); + + for (i = 0; i < G_N_ELEMENTS (fmt_map); ++i) { + gst_oss4_append_format_to_caps (fmt_map[i].oss_fmt, caps); + } + + gst_caps_do_simplify (caps); + + for (i = 0; i < gst_caps_get_size (caps); ++i) { + GstStructure *s; + + s = gst_caps_get_structure (caps, i); + gst_structure_set (s, "rate", GST_TYPE_INT_RANGE, GST_OSS4_MIN_SAMPLE_RATE, + GST_OSS4_MAX_SAMPLE_RATE, "channels", GST_TYPE_INT_RANGE, + GST_OSS4_MIN_CHANNELS, GST_OSS4_MAX_CHANNELS, NULL); + } + + return caps; +} + +static gint +gst_oss4_audio_ilog2 (gint x) +{ + /* well... hacker's delight explains... */ + x = x | (x >> 1); + x = x | (x >> 2); + x = x | (x >> 4); + x = x | (x >> 8); + x = x | (x >> 16); + x = x - ((x >> 1) & 0x55555555); + x = (x & 0x33333333) + ((x >> 2) & 0x33333333); + x = (x + (x >> 4)) & 0x0f0f0f0f; + x = x + (x >> 8); + x = x + (x >> 16); + return (x & 0x0000003f) - 1; +} + +/* called by gst_oss4_sink_prepare() and gst_oss4_source_prepare() */ +gboolean +gst_oss4_audio_set_format (GstObject * obj, int fd, GstRingBufferSpec * spec) +{ + struct audio_buf_info info = { 0, }; + int fmt, chans, rate, fragsize; + + fmt = gst_oss4_audio_get_oss_format (spec->format); + if (fmt == 0) + goto wrong_format; + + if (spec->type == GST_BUFTYPE_LINEAR && spec->width != 32 && + spec->width != 24 && spec->width != 16 && spec->width != 8) { + goto dodgy_width; + } + + /* format */ + GST_LOG_OBJECT (obj, "setting format: %d", fmt); + if (ioctl (fd, SNDCTL_DSP_SETFMT, &fmt) == -1) + goto set_format_failed; + + /* channels */ + GST_LOG_OBJECT (obj, "setting channels: %d", spec->channels); + chans = spec->channels; + if (ioctl (fd, SNDCTL_DSP_CHANNELS, &chans) == -1) + goto set_channels_failed; + + /* rate */ + GST_LOG_OBJECT (obj, "setting rate: %d", spec->rate); + rate = spec->rate; + if (ioctl (fd, SNDCTL_DSP_SPEED, &rate) == -1) + goto set_rate_failed; + + GST_DEBUG_OBJECT (obj, "effective format : %d", fmt); + GST_DEBUG_OBJECT (obj, "effective channels : %d", chans); + GST_DEBUG_OBJECT (obj, "effective rate : %d", rate); + + /* make sure format, channels, and rate are the ones we requested */ + if (fmt != gst_oss4_audio_get_oss_format (spec->format) || + chans != spec->channels || rate != spec->rate) { + /* This shouldn't happen, but hey */ + goto format_not_what_was_requested; + } + + /* CHECKME: maybe we should just leave the fragsize alone? (tpm) */ + fragsize = gst_oss4_audio_ilog2 (spec->segsize); + fragsize = ((spec->segtotal & 0x7fff) << 16) | fragsize; + GST_DEBUG_OBJECT (obj, "setting segsize: %d, segtotal: %d, value: %08x", + spec->segsize, spec->segtotal, fragsize); + + /* we could also use the new SNDCTL_DSP_POLICY if there's something in + * particular we're trying to achieve here */ + if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &fragsize) == -1) + goto set_fragsize_failed; + + if (GST_IS_OSS4_SOURCE (obj)) { + if (ioctl (fd, SNDCTL_DSP_GETISPACE, &info) == -1) + goto get_ispace_failed; + } else { + if (ioctl (fd, SNDCTL_DSP_GETOSPACE, &info) == -1) + goto get_ospace_failed; + } + + spec->segsize = info.fragsize; + spec->segtotal = info.fragstotal; + + spec->bytes_per_sample = (spec->width / 8) * spec->channels; + + GST_DEBUG_OBJECT (obj, "got segsize: %d, segtotal: %d, value: %08x", + spec->segsize, spec->segtotal, fragsize); + + return TRUE; + +/* ERRORS */ +wrong_format: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("Unable to get format %d", spec->format)); + return FALSE; + } +dodgy_width: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("unexpected width %d", spec->width)); + return FALSE; + } +set_format_failed: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("DSP_SETFMT(%d) failed: %s", fmt, g_strerror (errno))); + return FALSE; + } +set_channels_failed: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("DSP_CHANNELS(%d) failed: %s", chans, g_strerror (errno))); + return FALSE; + } +set_rate_failed: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("DSP_SPEED(%d) failed: %s", rate, g_strerror (errno))); + return FALSE; + } +set_fragsize_failed: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("DSP_SETFRAGMENT(%d) failed: %s", fragsize, g_strerror (errno))); + return FALSE; + } +get_ospace_failed: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("DSP_GETOSPACE failed: %s", g_strerror (errno))); + return FALSE; + } +get_ispace_failed: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("DSP_GETISPACE failed: %s", g_strerror (errno))); + return FALSE; + } +format_not_what_was_requested: + { + GST_ELEMENT_ERROR (obj, RESOURCE, SETTINGS, (NULL), + ("Format actually configured wasn't the one we requested. This is " + "probably either a bug in the driver or in the format probing code.")); + return FALSE; + } +} + +int +gst_oss4_audio_get_version (GstObject * obj, int fd) +{ + gint ver = 0; + + /* we use the old ioctl here on purpose instead of SNDCTL_SYSINFO */ + if (ioctl (fd, OSS_GETVERSION, &ver) < 0) { + GST_LOG_OBJECT (obj, "OSS_GETVERSION failed: %s", g_strerror (errno)); + return -1; + } + GST_LOG_OBJECT (obj, "OSS version: 0x%08x", ver); + return ver; +} + +gboolean +gst_oss4_audio_check_version (GstObject * obj, int fd) +{ + return (gst_oss4_audio_get_version (obj, fd) >= GST_MIN_OSS4_VERSION); +} + +gchar * +gst_oss4_audio_find_device (GstObject * oss) +{ + GValueArray *arr; + gchar *ret = NULL; + + arr = gst_property_probe_probe_and_get_values_name (GST_PROPERTY_PROBE (oss), + "device"); + + if (arr != NULL) { + if (arr->n_values > 0) { + const GValue *val; + + val = g_value_array_get_nth (arr, 0); + ret = g_value_dup_string (val); + } + g_value_array_free (arr); + } + + GST_LOG_OBJECT (oss, "first device found: %s", GST_STR_NULL (ret)); + + return ret; +} + +static gboolean +plugin_init (GstPlugin * plugin) +{ + gint rank; + + GST_DEBUG_CATEGORY_INIT (oss4sink_debug, "oss4sink", 0, "OSS4 audio sink"); + GST_DEBUG_CATEGORY_INIT (oss4src_debug, "oss4src", 0, "OSS4 audio src"); + GST_DEBUG_CATEGORY_INIT (oss4mixer_debug, "oss4mixer", 0, "OSS4 mixer"); + GST_DEBUG_CATEGORY_INIT (oss4_debug, "oss4", 0, "OSS4 plugin"); + +#ifdef ENABLE_NLS + GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE, + LOCALEDIR); + bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); +#endif + + /* we want a higher rank than the legacy OSS elements have now */ + rank = GST_RANK_SECONDARY + 1; + + if (!gst_element_register (plugin, "oss4sink", rank, GST_TYPE_OSS4_SINK) || + !gst_element_register (plugin, "oss4src", rank, GST_TYPE_OSS4_SOURCE) || + !gst_element_register (plugin, "oss4mixer", rank, GST_TYPE_OSS4_MIXER)) { + return FALSE; + } + + return TRUE; +} + +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "oss4", + "Open Sound System (OSS) version 4 support for GStreamer", + plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |