Remove panning API from cubeb

This is best done by the host application, and had very little
implementation anyways.

19 files changed, 7 insertions, 223 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bc98b40..b32a53a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,7 +67,6 @@ add_library(cubeb
   src/cubeb.c
   src/cubeb_mixer.cpp
   src/cubeb_resampler.cpp
-  src/cubeb_panner.cpp
   src/cubeb_log.cpp
   src/cubeb_strings.c
   src/cubeb_utils.cpp
diff --git a/include/cubeb/cubeb.h b/include/cubeb/cubeb.h
index 3305eb6..e6cf8dd 100644
--- a/include/cubeb/cubeb.h
+++ b/include/cubeb/cubeb.h
@@ -568,20 +568,6 @@ CUBEB_EXPORT int cubeb_stream_get_latency(cubeb_stream * stream, uint32_t * late
     @retval CUBEB_ERROR_NOT_SUPPORTED */
 CUBEB_EXPORT int cubeb_stream_set_volume(cubeb_stream * stream, float volume);
 
-/** If the stream is stereo, set the left/right panning. If the stream is mono,
-    this has no effect.
-    @param stream the stream for which to change the panning
-    @param panning a number from -1.0 to 1.0. -1.0 means that the stream is
-           fully mixed in the left channel, 1.0 means the stream is fully
-           mixed in the right channel. 0.0 is equal power in the right and
-           left channel (default).
-    @retval CUBEB_OK
-    @retval CUBEB_ERROR_INVALID_PARAMETER if stream is null or if panning is
-            outside the [-1.0, 1.0] range.
-    @retval CUBEB_ERROR_NOT_SUPPORTED
-    @retval CUBEB_ERROR stream is not mono nor stereo */
-CUBEB_EXPORT int cubeb_stream_set_panning(cubeb_stream * stream, float panning);
-
 /** Get the current output device for this stream.
     @param stm the stream for which to query the current output device
     @param device a pointer in which the current output device will be stored.
diff --git a/src/cubeb-internal.h b/src/cubeb-internal.h
index 9b6199c..312a9ea 100644
--- a/src/cubeb-internal.h
+++ b/src/cubeb-internal.h
@@ -64,7 +64,6 @@ struct cubeb_ops {
   int (* stream_get_position)(cubeb_stream * stream, uint64_t * position);
   int (* stream_get_latency)(cubeb_stream * stream, uint32_t * latency);
   int (* stream_set_volume)(cubeb_stream * stream, float volumes);
-  int (* stream_set_panning)(cubeb_stream * stream, float panning);
   int (* stream_get_current_device)(cubeb_stream * stream,
                                     cubeb_device ** const device);
   int (* stream_device_destroy)(cubeb_stream * stream,
diff --git a/src/cubeb.c b/src/cubeb.c
index cedd84c..85b104c 100644
--- a/src/cubeb.c
+++ b/src/cubeb.c
@@ -434,19 +434,6 @@ cubeb_stream_set_volume(cubeb_stream * stream, float volume)
   return stream->context->ops->stream_set_volume(stream, volume);
 }
 
-int cubeb_stream_set_panning(cubeb_stream * stream, float panning)
-{
-  if (!stream || panning < -1.0 || panning > 1.0) {
-    return CUBEB_ERROR_INVALID_PARAMETER;
-  }
-
-  if (!stream->context->ops->stream_set_panning) {
-    return CUBEB_ERROR_NOT_SUPPORTED;
-  }
-
-  return stream->context->ops->stream_set_panning(stream, panning);
-}
-
 int cubeb_stream_get_current_device(cubeb_stream * stream,
                                     cubeb_device ** const device)
 {
diff --git a/src/cubeb_alsa.c b/src/cubeb_alsa.c
index bfd4d8f..2a3c04e 100644
--- a/src/cubeb_alsa.c
+++ b/src/cubeb_alsa.c
@@ -1369,7 +1369,6 @@ static struct cubeb_ops const alsa_ops = {
   .stream_get_position = alsa_stream_get_position,
   .stream_get_latency = alsa_stream_get_latency,
   .stream_set_volume = alsa_stream_set_volume,
-  .stream_set_panning = NULL,
   .stream_get_current_device = NULL,
   .stream_device_destroy = NULL,
   .stream_register_device_changed_callback = NULL,
diff --git a/src/cubeb_audiotrack.c b/src/cubeb_audiotrack.c
index 0f4dfbb..22f1fe0 100644
--- a/src/cubeb_audiotrack.c
+++ b/src/cubeb_audiotrack.c
@@ -434,7 +434,6 @@ static struct cubeb_ops const audiotrack_ops = {
   .stream_get_position = audiotrack_stream_get_position,
   .stream_get_latency = audiotrack_stream_get_latency,
   .stream_set_volume = audiotrack_stream_set_volume,
-  .stream_set_panning = NULL,
   .stream_get_current_device = NULL,
   .stream_device_destroy = NULL,
   .stream_register_device_changed_callback = NULL,
diff --git a/src/cubeb_audiounit.cpp b/src/cubeb_audiounit.cpp
index 25355b4..9978504 100644
--- a/src/cubeb_audiounit.cpp
+++ b/src/cubeb_audiounit.cpp
@@ -23,7 +23,6 @@
 #include "cubeb/cubeb.h"
 #include "cubeb-internal.h"
 #include "cubeb_mixer.h"
-#include "cubeb_panner.h"
 #if !TARGET_OS_IPHONE
 #include "cubeb_osx_run_loop.h"
 #endif
@@ -242,7 +241,6 @@ struct cubeb_stream {
   uint32_t latency_frames = 0;
   atomic<uint32_t> current_latency_frames{ 0 };
   atomic<uint32_t> total_output_latency_frames { 0 };
-  atomic<float> panning{ 0 };
   unique_ptr<cubeb_resampler, decltype(&cubeb_resampler_destroy)> resampler;
   /* This is true if a device change callback is currently running.  */
   atomic<bool> switching_device{ false };
@@ -692,10 +690,6 @@ audiounit_output_callback(void * user_ptr,
   stm->frames_played = stm->frames_queued;
   stm->frames_queued += outframes;
 
-  AudioFormatFlags outaff = stm->output_desc.mFormatFlags;
-  float panning = (stm->output_desc.mChannelsPerFrame == 2) ?
-      stm->panning.load(memory_order_relaxed) : 0.0f;
-
   /* Post process output samples. */
   if (stm->draining) {
     size_t outbpf = cubeb_sample_size(stm->output_stream_params.format);
@@ -711,16 +705,6 @@ audiounit_output_callback(void * user_ptr,
                                 stm->temp_buffer_size,
                                 outBufferList->mBuffers[0].mData,
                                 outBufferList->mBuffers[0].mDataByteSize);
-  } else {
-    /* Pan stereo. */
-    if (panning != 0.0f) {
-      if (outaff & kAudioFormatFlagIsFloat) {
-        cubeb_pan_stereo_buffer_float(
-          (float*)output_buffer, outframes, panning);
-      } else if (outaff & kAudioFormatFlagIsSignedInteger) {
-        cubeb_pan_stereo_buffer_int((short*)output_buffer, outframes, panning);
-      }
-    }
   }
 
   return noErr;
@@ -3021,16 +3005,6 @@ audiounit_stream_set_volume(cubeb_stream * stm, float volume)
   return CUBEB_OK;
 }
 
-int audiounit_stream_set_panning(cubeb_stream * stm, float panning)
-{
-  if (stm->output_desc.mChannelsPerFrame > 2) {
-    return CUBEB_ERROR_INVALID_PARAMETER;
-  }
-
-  stm->panning.store(panning, memory_order_relaxed);
-  return CUBEB_OK;
-}
-
 unique_ptr<char[]> convert_uint32_into_string(UInt32 data)
 {
   // Simply create an empty string if no data.
@@ -3632,7 +3606,6 @@ cubeb_ops const audiounit_ops = {
   /*.stream_get_position =*/ audiounit_stream_get_position,
   /*.stream_get_latency =*/ audiounit_stream_get_latency,
   /*.stream_set_volume =*/ audiounit_stream_set_volume,
-  /*.stream_set_panning =*/ audiounit_stream_set_panning,
   /*.stream_get_current_device =*/ audiounit_stream_get_current_device,
   /*.stream_device_destroy =*/ audiounit_stream_device_destroy,
   /*.stream_register_device_changed_callback =*/ audiounit_stream_register_device_changed_callback,
diff --git a/src/cubeb_jack.cpp b/src/cubeb_jack.cpp
index 3632da5..3823ee9 100644
--- a/src/cubeb_jack.cpp
+++ b/src/cubeb_jack.cpp
@@ -130,7 +130,6 @@ static struct cubeb_ops const cbjack_ops = {
   .stream_get_position = cbjack_stream_get_position,
   .stream_get_latency = cbjack_get_latency,
   .stream_set_volume = cbjack_stream_set_volume,
-  .stream_set_panning = NULL,
   .stream_get_current_device = cbjack_stream_get_current_device,
   .stream_device_destroy = cbjack_stream_device_destroy,
   .stream_register_device_changed_callback = NULL,
diff --git a/src/cubeb_kai.c b/src/cubeb_kai.c
index f09aed2..5333968 100644
--- a/src/cubeb_kai.c
+++ b/src/cubeb_kai.c
@@ -362,7 +362,6 @@ static struct cubeb_ops const kai_ops = {
   /*.stream_get_position =*/ kai_stream_get_position,
   /*.stream_get_latency = */ kai_stream_get_latency,
   /*.stream_set_volume =*/ kai_stream_set_volume,
-  /*.stream_set_panning =*/ NULL,
   /*.stream_get_current_device =*/ NULL,
   /*.stream_device_destroy =*/ NULL,
   /*.stream_register_device_changed_callback=*/ NULL,
diff --git a/src/cubeb_opensl.c b/src/cubeb_opensl.c
index a5ca3ee..96374ec 100644
--- a/src/cubeb_opensl.c
+++ b/src/cubeb_opensl.c
@@ -1673,7 +1673,6 @@ static struct cubeb_ops const opensl_ops = {
   .stream_get_position = opensl_stream_get_position,
   .stream_get_latency = NULL,
   .stream_set_volume = opensl_stream_set_volume,
-  .stream_set_panning = NULL,
   .stream_get_current_device = NULL,
   .stream_device_destroy = NULL,
   .stream_register_device_changed_callback = NULL,
diff --git a/src/cubeb_panner.cpp b/src/cubeb_panner.cpp
deleted file mode 100644
index bd96ed6..0000000
--- a/src/cubeb_panner.cpp
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright © 2014 Mozilla Foundation
- *
- * This program is made available under an ISC-style license.  See the
- * accompanying file LICENSE for details.
- */
-
-#define _USE_MATH_DEFINES
-#include <math.h>
-#include <stdint.h>
-
-#include "cubeb_panner.h"
-
-#ifndef M_PI
-#define M_PI 3.14159263
-#endif
-
-/**
- * We use a cos/sin law.
- */
-
-namespace {
-template<typename T>
-void cubeb_pan_stereo_buffer(T * buf, uint32_t frames, float pan)
-{
-  if (pan == 0.0) {
-    return;
-  }
-  /* rescale in [0; 1] */
-  pan += 1;
-  pan /= 2;
-  float left_gain  = float(cos(pan * M_PI * 0.5));
-  float right_gain = float(sin(pan * M_PI * 0.5));
-
-  /* In we are panning on the left, pan the right channel into the left one and
-   * vice-versa. */
-  if (pan < 0.5) {
-    for (uint32_t i = 0; i < frames * 2; i+=2) {
-      buf[i]     = T(buf[i] + buf[i + 1] * left_gain);
-      buf[i + 1] = T(buf[i + 1] * right_gain);
-    }
-  } else {
-    for (uint32_t i = 0; i < frames * 2; i+=2) {
-      buf[i]     = T(buf[i] * left_gain);
-      buf[i + 1] = T(buf[i + 1] + buf[i] * right_gain);
-    }
-  }
-}
-}
-
-void cubeb_pan_stereo_buffer_float(float * buf, uint32_t frames, float pan)
-{
-  cubeb_pan_stereo_buffer(buf, frames, pan);
-}
-
-void cubeb_pan_stereo_buffer_int(short * buf, uint32_t frames, float pan)
-{
-  cubeb_pan_stereo_buffer(buf, frames, pan);
-}
-
diff --git a/src/cubeb_panner.h b/src/cubeb_panner.h
deleted file mode 100644
index c61363b..0000000
--- a/src/cubeb_panner.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright © 2014 Mozilla Foundation
- *
- * This program is made available under an ISC-style license.  See the
- * accompanying file LICENSE for details.
- */
-
-#if !defined(CUBEB_PANNER)
-#define CUBEB_PANNER
-
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
-/**
- * Pan an integer or an float stereo buffer according to a cos/sin pan law
- * @param buf the buffer to pan
- * @param frames the number of frames in `buf`
- * @param pan a float in [-1.0; 1.0]
- */
-void cubeb_pan_stereo_buffer_float(float * buf, uint32_t frames, float pan);
-void cubeb_pan_stereo_buffer_int(short* buf, uint32_t frames, float pan);
-
-#if defined(__cplusplus)
-}
-#endif
-
-#endif
diff --git a/src/cubeb_pulse.c b/src/cubeb_pulse.c
index 92b170b..ea2031f 100644
--- a/src/cubeb_pulse.c
+++ b/src/cubeb_pulse.c
@@ -1184,53 +1184,6 @@ sink_input_info_cb(pa_context * c, pa_sink_input_info const * i, int eol, void *
   WRAP(pa_threaded_mainloop_signal)(r->mainloop, 0);
 }
 
-static int
-pulse_stream_set_panning(cubeb_stream * stm, float panning)
-{
-  const pa_channel_map * map;
-  pa_cvolume cvol;
-  uint32_t index;
-  pa_operation * op;
-
-  if (!stm->output_stream) {
-    return CUBEB_ERROR;
-  }
-
-  WRAP(pa_threaded_mainloop_lock)(stm->context->mainloop);
-
-  map = WRAP(pa_stream_get_channel_map)(stm->output_stream);
-  if (!WRAP(pa_channel_map_can_balance)(map)) {
-    WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop);
-    return CUBEB_ERROR;
-  }
-
-  index = WRAP(pa_stream_get_index)(stm->output_stream);
-
-  struct sink_input_info_result r = { &cvol, stm->context->mainloop };
-  op = WRAP(pa_context_get_sink_input_info)(stm->context->context,
-                                            index,
-                                            sink_input_info_cb,
-                                            &r);
-  if (op) {
-    operation_wait(stm->context, stm->output_stream, op);
-    WRAP(pa_operation_unref)(op);
-  }
-
-  WRAP(pa_cvolume_set_balance)(&cvol, map, panning);
-
-  op = WRAP(pa_context_set_sink_input_volume)(stm->context->context,
-                                              index, &cvol, volume_success,
-                                              stm);
-  if (op) {
-    operation_wait(stm->context, stm->output_stream, op);
-    WRAP(pa_operation_unref)(op);
-  }
-
-  WRAP(pa_threaded_mainloop_unlock)(stm->context->mainloop);
-
-  return CUBEB_OK;
-}
-
 typedef struct {
   char * default_sink_name;
   char * default_source_name;
@@ -1637,7 +1590,6 @@ static struct cubeb_ops const pulse_ops = {
   .stream_get_position = pulse_stream_get_position,
   .stream_get_latency = pulse_stream_get_latency,
   .stream_set_volume = pulse_stream_set_volume,
-  .stream_set_panning = pulse_stream_set_panning,
   .stream_get_current_device = pulse_stream_get_current_device,
   .stream_device_destroy = pulse_stream_device_destroy,
   .stream_register_device_changed_callback = NULL,
diff --git a/src/cubeb_sndio.c b/src/cubeb_sndio.c
index 9e99b2c..c90a0e9 100644
--- a/src/cubeb_sndio.c
+++ b/src/cubeb_sndio.c
@@ -572,7 +572,6 @@ static struct cubeb_ops const sndio_ops = {
   .stream_get_position = sndio_stream_get_position,
   .stream_get_latency = sndio_stream_get_latency,
   .stream_set_volume = sndio_stream_set_volume,
-  .stream_set_panning = NULL,
   .stream_get_current_device = NULL,
   .stream_device_destroy = NULL,
   .stream_register_device_changed_callback = NULL,
diff --git a/src/cubeb_sun.c b/src/cubeb_sun.c
index 4dcfd64..64ab0b5 100644
--- a/src/cubeb_sun.c
+++ b/src/cubeb_sun.c
@@ -745,7 +745,6 @@ static struct cubeb_ops const sun_ops = {
   .stream_get_position = sun_stream_get_position,
   .stream_get_latency = sun_stream_get_latency,
   .stream_set_volume = sun_stream_set_volume,
-  .stream_set_panning = NULL,
   .stream_get_current_device = sun_get_current_device,
   .stream_device_destroy = sun_stream_device_destroy,
   .stream_register_device_changed_callback = NULL,
diff --git a/src/cubeb_wasapi.cpp b/src/cubeb_wasapi.cpp
index 1a31229..ab563fc 100644
--- a/src/cubeb_wasapi.cpp
+++ b/src/cubeb_wasapi.cpp
@@ -2951,7 +2951,6 @@ cubeb_ops const wasapi_ops = {
   /*.stream_get_position =*/ wasapi_stream_get_position,
   /*.stream_get_latency =*/ wasapi_stream_get_latency,
   /*.stream_set_volume =*/ wasapi_stream_set_volume,
-  /*.stream_set_panning =*/ NULL,
   /*.stream_get_current_device =*/ NULL,
   /*.stream_device_destroy =*/ NULL,
   /*.stream_register_device_changed_callback =*/ NULL,
diff --git a/src/cubeb_winmm.c b/src/cubeb_winmm.c
index fd5abe2..e064ca0 100644
--- a/src/cubeb_winmm.c
+++ b/src/cubeb_winmm.c
@@ -1060,7 +1060,6 @@ static struct cubeb_ops const winmm_ops = {
   /*.stream_get_position =*/ winmm_stream_get_position,
   /*.stream_get_latency = */ winmm_stream_get_latency,
   /*.stream_set_volume =*/ winmm_stream_set_volume,
-  /*.stream_set_panning =*/ NULL,
   /*.stream_get_current_device =*/ NULL,
   /*.stream_device_destroy =*/ NULL,
   /*.stream_register_device_changed_callback=*/ NULL,
diff --git a/test/test_audio.cpp b/test/test_audio.cpp
index 98ba197..ea1b999 100644
--- a/test/test_audio.cpp
+++ b/test/test_audio.cpp
@@ -148,7 +148,7 @@ int run_test(int num_channels, int sampling_rate, int is_float)
   return r;
 }
 
-int run_panning_volume_test(int is_float)
+int run_volume_test(int is_float)
 {
   int r = CUBEB_OK;
 
@@ -203,29 +203,17 @@ int run_panning_volume_test(int is_float)
     delay(100);
   }
 
-  fprintf(stderr, "Testing: panning\n");
-  for(int i=-4;i <= 4; ++i)
-  {
-    fprintf(stderr, "Panning: %.2f\n", i/4.0f);
-
-    cubeb_stream_set_panning(stream, i/4.0f);
-    cubeb_stream_start(stream);
-    delay(400);
-    cubeb_stream_stop(stream);
-    delay(100);
-  }
-
   return r;
 }
 
-TEST(cubeb, run_panning_volume_test_short)
+TEST(cubeb, run_volume_test_short)
 {
-  ASSERT_EQ(run_panning_volume_test(0), CUBEB_OK);
+  ASSERT_EQ(run_volume_test(0), CUBEB_OK);
 }
 
-TEST(cubeb, run_panning_volume_test_float)
+TEST(cubeb, run_volume_test_float)
 {
-  ASSERT_EQ(run_panning_volume_test(1), CUBEB_OK);
+  ASSERT_EQ(run_volume_test(1), CUBEB_OK);
 }
 
 TEST(cubeb, run_channel_rate_test)
diff --git a/test/test_sanity.cpp b/test/test_sanity.cpp
index caebe1b..56099d2 100644
--- a/test/test_sanity.cpp
+++ b/test/test_sanity.cpp
@@ -215,7 +215,7 @@ TEST(cubeb, configure_stream)
 
   params.format = STREAM_FORMAT;
   params.rate = STREAM_RATE;
-  params.channels = 2; // panning
+  params.channels = 2;
   params.layout = CUBEB_LAYOUT_STEREO;
   params.prefs = CUBEB_STREAM_PREF_NONE;
 
@@ -227,9 +227,6 @@ TEST(cubeb, configure_stream)
   r = cubeb_stream_set_volume(stream, 1.0f);
   ASSERT_TRUE(r == 0 || r == CUBEB_ERROR_NOT_SUPPORTED);
 
-  r = cubeb_stream_set_panning(stream, 0.0f);
-  ASSERT_TRUE(r == 0 || r == CUBEB_ERROR_NOT_SUPPORTED);
-
   cubeb_stream_destroy(stream);
   cubeb_destroy(ctx);
 }
@@ -247,7 +244,7 @@ TEST(cubeb, configure_stream_undefined_layout)
 
   params.format = STREAM_FORMAT;
   params.rate = STREAM_RATE;
-  params.channels = 2; // panning
+  params.channels = 2;
   params.layout = CUBEB_LAYOUT_UNDEFINED;
   params.prefs = CUBEB_STREAM_PREF_NONE;