Adding upstream version 14.2.upstream/14.2upstream

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

1 files changed, 181 insertions, 0 deletions

diff --git a/src/pulsecore/resampler.h b/src/pulsecore/resampler.h
new file mode 100644
index 0000000..5a264b3
--- /dev/null
+++ b/src/pulsecore/resampler.h
@@ -0,0 +1,181 @@
+#ifndef fooresamplerhfoo
+#define fooresamplerhfoo
+
+/***
+  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/>.
+***/
+
+#include <pulse/sample.h>
+#include <pulse/channelmap.h>
+#include <pulsecore/memblock.h>
+#include <pulsecore/memchunk.h>
+#include <pulsecore/sconv.h>
+#include <pulsecore/remap.h>
+#include <pulsecore/filter/lfe-filter.h>
+
+typedef struct pa_resampler pa_resampler;
+typedef struct pa_resampler_impl pa_resampler_impl;
+
+struct pa_resampler_impl {
+    void (*free)(pa_resampler *r);
+    void (*update_rates)(pa_resampler *r);
+
+    /* Returns the number of leftover frames in the input buffer. */
+    unsigned (*resample)(pa_resampler *r, const pa_memchunk *in, unsigned in_n_frames, pa_memchunk *out, unsigned *out_n_frames);
+
+    void (*reset)(pa_resampler *r);
+    void *data;
+};
+
+typedef enum pa_resample_method {
+    PA_RESAMPLER_INVALID                 = -1,
+    PA_RESAMPLER_SRC_SINC_BEST_QUALITY   = 0, /* = SRC_SINC_BEST_QUALITY */
+    PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY = 1, /* = SRC_SINC_MEDIUM_QUALITY */
+    PA_RESAMPLER_SRC_SINC_FASTEST        = 2, /* = SRC_SINC_FASTEST */
+    PA_RESAMPLER_SRC_ZERO_ORDER_HOLD     = 3, /* = SRC_ZERO_ORDER_HOLD */
+    PA_RESAMPLER_SRC_LINEAR              = 4, /* = SRC_LINEAR */
+    PA_RESAMPLER_TRIVIAL,
+    PA_RESAMPLER_SPEEX_FLOAT_BASE,
+    PA_RESAMPLER_SPEEX_FLOAT_MAX = PA_RESAMPLER_SPEEX_FLOAT_BASE + 10,
+    PA_RESAMPLER_SPEEX_FIXED_BASE,
+    PA_RESAMPLER_SPEEX_FIXED_MAX = PA_RESAMPLER_SPEEX_FIXED_BASE + 10,
+    PA_RESAMPLER_FFMPEG,
+    PA_RESAMPLER_AUTO, /* automatic select based on sample format */
+    PA_RESAMPLER_COPY,
+    PA_RESAMPLER_PEAKS,
+    PA_RESAMPLER_SOXR_MQ,
+    PA_RESAMPLER_SOXR_HQ,
+    PA_RESAMPLER_SOXR_VHQ,
+    PA_RESAMPLER_MAX
+} pa_resample_method_t;
+
+typedef enum pa_resample_flags {
+    PA_RESAMPLER_VARIABLE_RATE = 0x0001U,
+    PA_RESAMPLER_NO_REMAP      = 0x0002U,  /* implies NO_REMIX */
+    PA_RESAMPLER_NO_REMIX      = 0x0004U,
+    PA_RESAMPLER_NO_FILL_SINK  = 0x0010U,
+    PA_RESAMPLER_PRODUCE_LFE   = 0x0020U,
+    PA_RESAMPLER_CONSUME_LFE   = 0x0040U,
+} pa_resample_flags_t;
+
+struct pa_resampler {
+    pa_resample_method_t method;
+    pa_resample_flags_t flags;
+
+    pa_sample_spec i_ss, o_ss;
+    pa_channel_map i_cm, o_cm;
+    size_t i_fz, o_fz, w_fz, w_sz;
+    pa_mempool *mempool;
+
+    pa_memchunk to_work_format_buf;
+    pa_memchunk remap_buf;
+    pa_memchunk resample_buf;
+    pa_memchunk from_work_format_buf;
+    size_t to_work_format_buf_size;
+    size_t remap_buf_size;
+    size_t resample_buf_size;
+    size_t from_work_format_buf_size;
+
+    /* points to buffer before resampling stage, remap or to_work */
+    pa_memchunk *leftover_buf;
+    size_t *leftover_buf_size;
+
+    /* have_leftover points to leftover_in_remap or leftover_in_to_work */
+    bool *have_leftover;
+    bool leftover_in_remap;
+    bool leftover_in_to_work;
+
+    pa_sample_format_t work_format;
+    uint8_t work_channels;
+
+    pa_convert_func_t to_work_format_func;
+    pa_convert_func_t from_work_format_func;
+
+    pa_remap_t remap;
+    bool map_required;
+
+    pa_lfe_filter_t *lfe_filter;
+
+    pa_resampler_impl impl;
+};
+
+pa_resampler* pa_resampler_new(
+        pa_mempool *pool,
+        const pa_sample_spec *a,
+        const pa_channel_map *am,
+        const pa_sample_spec *b,
+        const pa_channel_map *bm,
+	unsigned crossover_freq,
+        pa_resample_method_t resample_method,
+        pa_resample_flags_t flags);
+
+void pa_resampler_free(pa_resampler *r);
+
+/* Returns the size of an input memory block which is required to return the specified amount of output data */
+size_t pa_resampler_request(pa_resampler *r, size_t out_length);
+
+/* Inverse of pa_resampler_request() */
+size_t pa_resampler_result(pa_resampler *r, size_t in_length);
+
+/* Returns the maximum size of input blocks we can process without needing bounce buffers larger than the mempool tile size. */
+size_t pa_resampler_max_block_size(pa_resampler *r);
+
+/* Pass the specified memory chunk to the resampler and return the newly resampled data */
+void pa_resampler_run(pa_resampler *r, const pa_memchunk *in, pa_memchunk *out);
+
+/* Change the input rate of the resampler object */
+void pa_resampler_set_input_rate(pa_resampler *r, uint32_t rate);
+
+/* Change the output rate of the resampler object */
+void pa_resampler_set_output_rate(pa_resampler *r, uint32_t rate);
+
+/* Reinitialize state of the resampler, possibly due to seeking or other discontinuities */
+void pa_resampler_reset(pa_resampler *r);
+
+/* Rewind resampler */
+void pa_resampler_rewind(pa_resampler *r, size_t out_frames);
+
+/* Return the resampling method of the resampler object */
+pa_resample_method_t pa_resampler_get_method(pa_resampler *r);
+
+/* Try to parse the resampler method */
+pa_resample_method_t pa_parse_resample_method(const char *string);
+
+/* return a human readable string for the specified resampling method. Inverse of pa_parse_resample_method() */
+const char *pa_resample_method_to_string(pa_resample_method_t m);
+
+/* Return 1 when the specified resampling method is supported */
+int pa_resample_method_supported(pa_resample_method_t m);
+
+const pa_channel_map* pa_resampler_input_channel_map(pa_resampler *r);
+const pa_sample_spec* pa_resampler_input_sample_spec(pa_resampler *r);
+const pa_channel_map* pa_resampler_output_channel_map(pa_resampler *r);
+const pa_sample_spec* pa_resampler_output_sample_spec(pa_resampler *r);
+
+/* Implementation specific init functions */
+int pa_resampler_ffmpeg_init(pa_resampler *r);
+int pa_resampler_libsamplerate_init(pa_resampler *r);
+int pa_resampler_peaks_init(pa_resampler *r);
+int pa_resampler_speex_init(pa_resampler *r);
+int pa_resampler_trivial_init(pa_resampler*r);
+int pa_resampler_soxr_init(pa_resampler *r);
+
+/* Resampler-specific quirks */
+bool pa_speex_is_fixed_point(void);
+
+#endif