From 610f0bde4c05a9702b96bdb3f65d7d62fff170ee Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Michael=20K=C3=B6tter?= Date: Thu, 15 Nov 2007 18:41:31 +0000 Subject: ext/alsaspdif/alsaspdifsink.c: Fix sample rate and clocking. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Original commit message from CVS: Patch by: Michael Kötter * ext/alsaspdif/alsaspdifsink.c: (alsaspdifsink_set_caps), (alsaspdifsink_get_time), (alsaspdifsink_open), (alsaspdifsink_set_params), (alsaspdifsink_delay), (plugin_init): Fix sample rate and clocking. Remove buffer_time and period_time as this seems to break on some hardware. Fixes #485462. --- ext/alsaspdif/alsaspdifsink.c | 162 ++++++++++++++++++------------------------ 1 file changed, 69 insertions(+), 93 deletions(-) (limited to 'ext') diff --git a/ext/alsaspdif/alsaspdifsink.c b/ext/alsaspdif/alsaspdifsink.c index bea75bf9..15248614 100644 --- a/ext/alsaspdif/alsaspdifsink.c +++ b/ext/alsaspdif/alsaspdifsink.c @@ -50,6 +50,8 @@ GST_DEBUG_CATEGORY_STATIC (alsaspdifsink_debug); /* Size in bytes of an ALSA PCM frame (4, for this case). */ #define ALSASPDIFSINK_BYTES_PER_FRAME ((AC3_BITS / 8) * AC3_CHANNELS) +#define IEC958_SAMPLES_PER_FRAME (IEC958_FRAME_SIZE / ALSASPDIFSINK_BYTES_PER_FRAME) + #if 0 /* The duration of a single IEC958 frame. */ #define IEC958_FRAME_DURATION (32 * GST_MSECOND) @@ -127,6 +129,8 @@ static void alsaspdifsink_finalize (GObject * object); static GstStateChangeReturn alsaspdifsink_change_state (GstElement * element, GstStateChange transition); static int alsaspdifsink_find_pcm_device (AlsaSPDIFSink * sink); +static gboolean alsaspdifsink_set_params (AlsaSPDIFSink * sink); +static snd_pcm_sframes_t alsaspdifsink_delay (AlsaSPDIFSink * sink); /* Alsa error handler to suppress messages from within the ALSA library */ static void ignore_alsa_err (const char *file, int line, const char *function, @@ -275,6 +279,12 @@ alsaspdifsink_set_caps (GstBaseSink * bsink, GstCaps * caps) &sink->rate)) sink->rate = 48000; + if (!alsaspdifsink_set_params (sink)) { + GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, + ("Cannot set ALSA hardware parameters"), GST_ERROR_SYSTEM); + return FALSE; + } + return TRUE; } @@ -289,22 +299,31 @@ alsaspdifsink_provide_clock (GstElement * elem) static GstClockTime alsaspdifsink_get_time (GstClock * clock, gpointer user_data) { + GstClockTime result; + snd_pcm_sframes_t raw, delay, samples; AlsaSPDIFSink *sink = ALSASPDIFSINK (user_data); - return sink->frames * sink->rate / 1536; + raw = samples = sink->frames * IEC958_SAMPLES_PER_FRAME; + delay = alsaspdifsink_delay (sink); + + if (samples > delay) + samples -= delay; + else + samples = 0; + + result = gst_util_uint64_scale_int (samples, GST_SECOND, sink->rate); + GST_LOG_OBJECT (sink, + "Samples raw: %d, delay: %d, real: %d, Time: %" GST_TIME_FORMAT, raw, + delay, samples, GST_TIME_ARGS (result)); + return result; } static gboolean alsaspdifsink_open (AlsaSPDIFSink * sink) { char *pcm_name = sink->device; - snd_pcm_hw_params_t *params; - snd_pcm_sw_params_t *sw_params; - unsigned int rate, buffer_time, period_time, tmp; - snd_pcm_uframes_t avail_min; - int err, step; + int err; char devstr[256]; /* Storage for local 'default' device string */ - GstClockTime time; /* * Try and open our default iec958 device. Fall back to searching on card x @@ -333,28 +352,44 @@ alsaspdifsink_open (AlsaSPDIFSink * sink) pcm_name); err = alsaspdifsink_find_pcm_device (sink); - if (err == 0 && sink->pcm == NULL) { - GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, - ("Could not open IEC958/SPDIF output device"), GST_ERROR_SYSTEM); - return FALSE; - } + if (err == 0 && sink->pcm == NULL) + goto open_failed; } + if (err < 0) + goto failed; - if (err < 0) { + return TRUE; + + /* ERRORS */ +open_failed: + { + GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, + ("Could not open IEC958/SPDIF output device"), GST_ERROR_SYSTEM); + return FALSE; + } +failed: + { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, ("snd_pcm_open: %s", snd_strerror (err)), GST_ERROR_SYSTEM); return FALSE; } +} + +static gboolean +alsaspdifsink_set_params (AlsaSPDIFSink * sink) +{ + snd_pcm_hw_params_t *params; + unsigned int rate; + int err; snd_pcm_hw_params_malloc (¶ms); - snd_pcm_sw_params_malloc (&sw_params); err = snd_pcm_hw_params_any (sink->pcm, params); if (err < 0) { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, ("Broken configuration for this PCM: " "no configurations available"), GST_ERROR_SYSTEM); - goto __close; + goto __error; } /* Set interleaved access. */ @@ -363,12 +398,13 @@ alsaspdifsink_open (AlsaSPDIFSink * sink) if (err < 0) { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, ("Access type not available"), GST_ERROR_SYSTEM); - goto __close; + goto __error; } err = snd_pcm_hw_params_set_format (sink->pcm, params, AC3_FORMAT_BE); if (err < 0) { /* Try LE output and swap data */ + GST_DEBUG_OBJECT (sink, "PCM format S16_BE not supported, trying S16_LE"); err = snd_pcm_hw_params_set_format (sink->pcm, params, AC3_FORMAT_LE); sink->need_swap = TRUE; } else @@ -377,102 +413,44 @@ alsaspdifsink_open (AlsaSPDIFSink * sink) if (err < 0) { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, ("Sample format not available"), GST_ERROR_SYSTEM); - goto __close; + goto __error; } err = snd_pcm_hw_params_set_channels (sink->pcm, params, AC3_CHANNELS); if (err < 0) { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, ("Channels count not available"), GST_ERROR_SYSTEM); - goto __close; + goto __error; } rate = sink->rate; + GST_DEBUG_OBJECT (sink, "Setting S/PDIF sample rate: %d", rate); err = snd_pcm_hw_params_set_rate_near (sink->pcm, params, &rate, 0); - if (err < 0) { + if (err != 0) { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, ("Rate not available"), GST_ERROR_SYSTEM); - goto __close; - } - - buffer_time = 500000; - err = snd_pcm_hw_params_set_buffer_time_near (sink->pcm, params, - &buffer_time, 0); - if (err < 0) { - GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, - ("Buffer time not available"), GST_ERROR_SYSTEM); - goto __close; - } - time = buffer_time * 1000; - GST_DEBUG_OBJECT (sink, "buffer size set to %" GST_TIME_FORMAT, - GST_TIME_ARGS (time)); - - step = 2; - period_time = 10000 * 2; - do { - period_time /= 2; - tmp = period_time; - - err = snd_pcm_hw_params_set_period_time_near (sink->pcm, params, &tmp, 0); - if (err < 0) { - GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, - ("Period time not available"), GST_ERROR_SYSTEM); - goto __close; - } - - if (tmp == period_time) { - period_time /= 3; - tmp = period_time; - err = snd_pcm_hw_params_set_period_time_near (sink->pcm, params, &tmp, 0); - if (tmp == period_time) { - period_time = 10000 * 2; - } - } - } while (buffer_time == period_time && period_time > 10000); - - if (buffer_time == period_time) { - GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, - ("Buffer time and period time match, could not use"), GST_ERROR_SYSTEM); - goto __close; + goto __error; } err = snd_pcm_hw_params (sink->pcm, params); if (err < 0) { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, ("PCM hw_params failed: %s", snd_strerror (err)), GST_ERROR_SYSTEM); - goto __close; + goto __error; } - err = snd_pcm_sw_params_current (sink->pcm, sw_params); - if (err < 0) { - GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, - ("Cannot retrieve software params"), GST_ERROR_SYSTEM); - goto __close; - } - - avail_min = 48000 * 0.15; - err = snd_pcm_sw_params_set_avail_min (sink->pcm, sw_params, avail_min); - if (err < 0) { - GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, - ("Cannot set avail min"), GST_ERROR_SYSTEM); - goto __close; - } - snd_pcm_sw_params_get_avail_min (sw_params, &avail_min); - GST_DEBUG_OBJECT (sink, "Avail min set to:%lu frames", avail_min); - snd_pcm_hw_params_free (params); - snd_pcm_sw_params_free (sw_params); + return TRUE; -__close: - snd_pcm_hw_params_free (params); - snd_pcm_sw_params_free (sw_params); - snd_pcm_close (sink->pcm); - sink->pcm = NULL; - return FALSE; + /* ERRORS */ +__error: + { + snd_pcm_hw_params_free (params); + return FALSE; + } } - static void alsaspdifsink_close (AlsaSPDIFSink * sink) { @@ -700,9 +678,8 @@ alsaspdifsink_get_times (GstBaseSink * bsink, GstBuffer * buffer, *end = GST_CLOCK_TIME_NONE; } -#if 0 -static GstClockTime -alsaspdifsink_current_delay (AlsaSPDIFSink * sink) +static snd_pcm_sframes_t +alsaspdifsink_delay (AlsaSPDIFSink * sink) { snd_pcm_sframes_t delay; int err; @@ -712,9 +689,10 @@ alsaspdifsink_current_delay (AlsaSPDIFSink * sink) return 0; } - return ALSASPDIFSINK_TIME_PER_FRAMES (sink, delay); + return delay; } +#if 0 static void generate_iec958_zero_frame (guchar * buffer) { @@ -850,11 +828,9 @@ plugin_init (GstPlugin * plugin) GST_TYPE_ALSASPDIFSINK)) { return FALSE; } - return TRUE; } - GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "alsaspdif", -- cgit v1.2.1