Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 178 insertions, 0 deletions

diff --git a/src/pulsecore/resampler/speex.c b/src/pulsecore/resampler/speex.c
new file mode 100644
index 0000000..66387e5
--- /dev/null
+++ b/src/pulsecore/resampler/speex.c
@@ -0,0 +1,178 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <speex/speex_resampler.h>
+#include <math.h>
+
+#include <pulsecore/once.h>
+#include <pulsecore/resampler.h>
+
+bool pa_speex_is_fixed_point(void) {
+    static bool result = false;
+    PA_ONCE_BEGIN {
+        float f_out = -1.0f, f_in = 1.0f;
+        spx_uint32_t in_len = 1, out_len = 1;
+        SpeexResamplerState *s;
+
+        pa_assert_se(s = speex_resampler_init(1, 1, 1,
+            SPEEX_RESAMPLER_QUALITY_MIN, NULL));
+
+        /* feed one sample that is too soft for fixed-point speex */
+        pa_assert_se(speex_resampler_process_float(s, 0, &f_in, &in_len,
+            &f_out, &out_len) == RESAMPLER_ERR_SUCCESS);
+
+        /* expecting sample has been processed, one sample output */
+        pa_assert_se(in_len == 1 && out_len == 1);
+
+        /* speex compiled with --enable-fixed-point will output 0.0 due to insufficient precision */
+        if (fabsf(f_out) < 0.00001f)
+            result = true;
+
+        speex_resampler_destroy(s);
+    } PA_ONCE_END;
+    return result;
+}
+
+
+static unsigned speex_resample_float(pa_resampler *r, const pa_memchunk *input, unsigned in_n_frames, pa_memchunk *output, unsigned *out_n_frames) {
+    float *in, *out;
+    uint32_t inf = in_n_frames, outf = *out_n_frames;
+    SpeexResamplerState *state;
+
+    pa_assert(r);
+    pa_assert(input);
+    pa_assert(output);
+    pa_assert(out_n_frames);
+
+    state = r->impl.data;
+
+    in = pa_memblock_acquire_chunk(input);
+    out = pa_memblock_acquire_chunk(output);
+
+    /* Strictly speaking, speex resampler expects its input
+     * to be normalized to the [-32768.0 .. 32767.0] range.
+     * This matters if speex has been compiled with --enable-fixed-point,
+     * because such speex will round the samples to the nearest
+     * integer. speex with --enable-fixed-point is therefore incompatible
+     * with PulseAudio's floating-point sample range [-1 .. 1]. speex
+     * without --enable-fixed-point works fine with this range.
+     * Care has been taken to call speex_resample_float() only
+     * for speex compiled without --enable-fixed-point.
+     */
+    pa_assert_se(speex_resampler_process_interleaved_float(state, in, &inf, out, &outf) == 0);
+
+    pa_memblock_release(input->memblock);
+    pa_memblock_release(output->memblock);
+
+    pa_assert(inf == in_n_frames);
+    *out_n_frames = outf;
+
+    return 0;
+}
+
+static unsigned speex_resample_int(pa_resampler *r, const pa_memchunk *input, unsigned in_n_frames, pa_memchunk *output, unsigned *out_n_frames) {
+    int16_t *in, *out;
+    uint32_t inf = in_n_frames, outf = *out_n_frames;
+    SpeexResamplerState *state;
+
+    pa_assert(r);
+    pa_assert(input);
+    pa_assert(output);
+    pa_assert(out_n_frames);
+
+    state = r->impl.data;
+
+    in = pa_memblock_acquire_chunk(input);
+    out = pa_memblock_acquire_chunk(output);
+
+    pa_assert_se(speex_resampler_process_interleaved_int(state, in, &inf, out, &outf) == 0);
+
+    pa_memblock_release(input->memblock);
+    pa_memblock_release(output->memblock);
+
+    pa_assert(inf == in_n_frames);
+    *out_n_frames = outf;
+
+    return 0;
+}
+
+static void speex_update_rates(pa_resampler *r) {
+    SpeexResamplerState *state;
+    pa_assert(r);
+
+    state = r->impl.data;
+
+    pa_assert_se(speex_resampler_set_rate(state, r->i_ss.rate, r->o_ss.rate) == 0);
+}
+
+static void speex_reset(pa_resampler *r) {
+    SpeexResamplerState *state;
+    pa_assert(r);
+
+    state = r->impl.data;
+
+    pa_assert_se(speex_resampler_reset_mem(state) == 0);
+}
+
+static void speex_free(pa_resampler *r) {
+    SpeexResamplerState *state;
+    pa_assert(r);
+
+    state = r->impl.data;
+    if (!state)
+        return;
+
+    speex_resampler_destroy(state);
+}
+
+int pa_resampler_speex_init(pa_resampler *r) {
+    int q, err;
+    SpeexResamplerState *state;
+
+    pa_assert(r);
+
+    r->impl.free = speex_free;
+    r->impl.update_rates = speex_update_rates;
+    r->impl.reset = speex_reset;
+
+    if (r->method >= PA_RESAMPLER_SPEEX_FIXED_BASE && r->method <= PA_RESAMPLER_SPEEX_FIXED_MAX) {
+
+        q = r->method - PA_RESAMPLER_SPEEX_FIXED_BASE;
+        r->impl.resample = speex_resample_int;
+
+    } else {
+        pa_assert(r->method >= PA_RESAMPLER_SPEEX_FLOAT_BASE && r->method <= PA_RESAMPLER_SPEEX_FLOAT_MAX);
+
+        q = r->method - PA_RESAMPLER_SPEEX_FLOAT_BASE;
+        r->impl.resample = speex_resample_float;
+    }
+
+    pa_log_info("Choosing speex quality setting %i.", q);
+
+    if (!(state = speex_resampler_init(r->work_channels, r->i_ss.rate, r->o_ss.rate, q, &err)))
+        return -1;
+
+    r->impl.data = state;
+
+    return 0;
+}