int AudioResampler::FillBufferDifferentRate(uint8_t* buffer, int length) {
const int input_samplesize = GetSamplesizeForFormat(input_format);
const int output_samplesize = GetSamplesizeForFormat(output_format);
//The buffer size has to be a multiple of a frame
const int buffer_size=sizeof(internal_buffer) - sizeof(internal_buffer)%(nr_of_channels*((input_samplesize>output_samplesize) ? input_samplesize : output_samplesize));
int total_output_frames = length / (output_samplesize*nr_of_channels);
int amount_of_samples_to_read = 0;
int amount_of_samples_read = 0;
uint8_t * advanced_input_buffer = internal_buffer;
int unused_frames = 0;
int empty_buffer_space = 0;
int error = 0;
#ifdef HAVE_LIBSPEEXDSP
spx_uint32_t numerator = 0;
spx_uint32_t denominator = 0;
#endif
while (total_output_frames > 0) {
//Calculate how much frames of the last cycle are unused - to reuse them
unused_frames = conversion_data.input_frames - conversion_data.input_frames_used;
empty_buffer_space = buffer_size / output_samplesize - unused_frames*nr_of_channels;
advanced_input_buffer = internal_buffer;
//If there is still unused data in the input_buffer order it to the front
for (int i = 0; i < unused_frames*nr_of_channels*output_samplesize; i++) {
*advanced_input_buffer = *(advanced_input_buffer + empty_buffer_space*output_samplesize);
advanced_input_buffer++;
}
//advanced_input_buffer is now offset to the first frame of new data!
//ensure that the input buffer is not able to overrun
amount_of_samples_to_read = (input_samplesize > output_samplesize) ? (empty_buffer_space*output_samplesize) / input_samplesize : empty_buffer_space;
//Read as many frames as needed to refill the buffer (filled after the conversion to float)
if (amount_of_samples_to_read != 0) {
switch (output_format) {
case AudioDecoder::Format::F32: amount_of_samples_read = DecodeAndConvertFloat(wrapped_decoder.get(), advanced_input_buffer, amount_of_samples_to_read, input_samplesize, input_format); break;
#ifdef HAVE_LIBSPEEXDSP
case AudioDecoder::Format::S16: amount_of_samples_read = DecodeAndConvertInt16(wrapped_decoder.get(), advanced_input_buffer, amount_of_samples_to_read, input_samplesize, input_format); break;
#endif
default: error_message = "internal error: output_format is not convertable"; return ERROR;
}
if (amount_of_samples_read < 0) {
error_message = wrapped_decoder->GetError();
return amount_of_samples_read; //error occured
}
}
//Now we have a prepared full buffer of converted values
//Prepare the source data
conversion_data.input_frames = amount_of_samples_read / nr_of_channels + unused_frames;
conversion_data.output_frames = total_output_frames;
#if defined(HAVE_LIBSPEEXDSP)
conversion_data.input_frames_used = conversion_data.input_frames;
conversion_data.output_frames_gen = conversion_data.output_frames;
//libspeexdsp defines a sample rate conversion with a fraction (input/output)
numerator = input_rate*pitch;
denominator = output_rate * STANDARD_PITCH;
if (pitch_handled_by_decoder) {
numerator = input_rate;
denominator = output_rate;
}
if (conversion_data.ratio_num != numerator || conversion_data.ratio_denom != denominator) {
speex_resampler_set_rate_frac(conversion_state, numerator, denominator, input_rate, output_rate);
conversion_data.ratio_num = numerator;
conversion_data.ratio_denom = denominator;
}
//A pitfall from libspeexdsp if the output buffer is defined to big - everything stutters -achieved good values with the same size as the input buffer for a maximum
conversion_data.output_frames_gen=(conversion_data.input_frames<conversion_data.output_frames_gen) ? conversion_data.input_frames :conversion_data.output_frames_gen;
switch (output_format) {
case Format::F32:
error = speex_resampler_process_interleaved_float(conversion_state, (float*)internal_buffer, &conversion_data.input_frames_used, (float*)buffer, &conversion_data.output_frames_gen);
break;
case Format::S16:
error = speex_resampler_process_interleaved_int(conversion_state, (spx_int16_t*)internal_buffer, &conversion_data.input_frames_used, (spx_int16_t*)buffer, &conversion_data.output_frames_gen);
break;
default: error_message = "internal error: output_format is not convertable"; return ERROR;
}
if (error != 0) {
error_message = speex_resampler_strerror(error);
return ERROR;
}
#elif defined(HAVE_LIBSAMPLERATE)
conversion_data.data_in = (float*)internal_buffer;
conversion_data.data_out = (float*)buffer;
if (pitch_handled_by_decoder) {
conversion_data.src_ratio = (output_rate*1.0) / input_rate;
}
else {
conversion_data.src_ratio = (output_rate*STANDARD_PITCH *1.0) / (input_rate*pitch*1.0);
}
conversion_data.end_of_input = (wrapped_decoder->IsFinished()) ? 1 : 0;
//Now let libsamplerate filter the data
error = src_process(conversion_state, &conversion_data);
if (error != 0) {
error_message = src_strerror(error);
return ERROR;
}
#endif
total_output_frames -= conversion_data.output_frames_gen;
buffer += conversion_data.output_frames_gen*nr_of_channels*output_samplesize;
if ((conversion_data.input_frames == 0 && conversion_data.output_frames_gen <= conversion_data.output_frames) || conversion_data.output_frames_gen == 0) {
finished = true;
//There is nothing left to convert - return how much samples (in bytes) are converted!
return length - total_output_frames*(output_samplesize*nr_of_channels);
}
}
return length;
}
/** @internal @This handles data.
*
* @param upipe description structure of the pipe
* @param uref uref structure
* @param upump_p reference to pump that generated the buffer
* @return false if the input must be blocked
*/
static bool upipe_speexdsp_handle(struct upipe *upipe, struct uref *uref,
struct upump **upump_p)
{
struct upipe_speexdsp *upipe_speexdsp = upipe_speexdsp_from_upipe(upipe);
struct urational drift_rate;
if (!ubase_check(uref_clock_get_rate(uref, &drift_rate)))
drift_rate = (struct urational){ 1, 1 };
/* reinitialize resampler when drift rate changes */
if (urational_cmp(&drift_rate, &upipe_speexdsp->drift_rate)) {
upipe_speexdsp->drift_rate = drift_rate;
spx_uint32_t ratio_num = drift_rate.den;
spx_uint32_t ratio_den = drift_rate.num;
spx_uint32_t in_rate = upipe_speexdsp->rate * ratio_num / ratio_den;
spx_uint32_t out_rate = upipe_speexdsp->rate;
int err = speex_resampler_set_rate_frac(upipe_speexdsp->ctx,
ratio_num, ratio_den, in_rate, out_rate);
if (err) {
upipe_err_va(upipe, "Couldn't resample from %u to %u: %s",
in_rate, out_rate, speex_resampler_strerror(err));
} else {
upipe_dbg_va(upipe, "Resampling from %u to %u",
in_rate, out_rate);
}
}
size_t size;
if (!ubase_check(uref_sound_size(uref, &size, NULL /* sample_size */))) {
uref_free(uref);
return true;
}
struct ubuf *ubuf = ubuf_sound_alloc(upipe_speexdsp->ubuf_mgr, size + 10);
if (!ubuf)
return false;
const void *in;
uref_sound_read_void(uref, 0, -1, &in, 1);
void *out;
ubuf_sound_write_void(ubuf, 0, -1, &out, 1);
spx_uint32_t in_len = size; /* input size */
spx_uint32_t out_len = size + 10; /* available output size */
int err;
if (upipe_speexdsp->f32)
err = speex_resampler_process_interleaved_float(upipe_speexdsp->ctx,
in, &in_len, out, &out_len);
else
err = speex_resampler_process_interleaved_int(upipe_speexdsp->ctx,
in, &in_len, out, &out_len);
if (err) {
upipe_err_va(upipe, "Could not resample: %s",
speex_resampler_strerror(err));
}
uref_sound_unmap(uref, 0, -1, 1);
ubuf_sound_unmap(ubuf, 0, -1, 1);
if (err) {
ubuf_free(ubuf);
} else {
ubuf_sound_resize(ubuf, 0, out_len);
uref_attach_ubuf(uref, ubuf);
}
upipe_speexdsp_output(upipe, uref, upump_p);
return true;
}
/** @internal @This receives incoming uref.
*
* @param upipe description structure of the pipe
* @param uref uref structure describing the picture
* @param upump_p reference to pump that generated the buffer
*/
static void upipe_speexdsp_input(struct upipe *upipe, struct uref *uref,
struct upump **upump_p)
{
if (!upipe_speexdsp_check_input(upipe)) {
upipe_speexdsp_hold_input(upipe, uref);
upipe_speexdsp_block_input(upipe, upump_p);
} else if (!upipe_speexdsp_handle(upipe, uref, upump_p)) {
upipe_speexdsp_hold_input(upipe, uref);
upipe_speexdsp_block_input(upipe, upump_p);
/* Increment upipe refcount to avoid disappearing before all packets
* have been sent. */
upipe_use(upipe);
}
}
/** @internal @This receives a provided ubuf manager.
*
* @param upipe description structure of the pipe
* @param flow_format amended flow format
* @return an error code
*/
static int upipe_speexdsp_check(struct upipe *upipe, struct uref *flow_format)
{
struct upipe_speexdsp *upipe_speexdsp = upipe_speexdsp_from_upipe(upipe);
if (flow_format != NULL)
upipe_speexdsp_store_flow_def(upipe, flow_format);
if (upipe_speexdsp->flow_def == NULL)
return UBASE_ERR_NONE;
bool was_buffered = !upipe_speexdsp_check_input(upipe);
upipe_speexdsp_output_input(upipe);
upipe_speexdsp_unblock_input(upipe);
if (was_buffered && upipe_speexdsp_check_input(upipe)) {
/* All packets have been output, release again the pipe that has been
* used in @ref upipe_speexdsp_input. */
upipe_release(upipe);
}
return UBASE_ERR_NONE;
}
/** @internal @This sets the input flow definition.
*
* @param upipe description structure of the pipe
* @param flow_def flow definition packet
* @return an error code
*/
static int upipe_speexdsp_set_flow_def(struct upipe *upipe, struct uref *flow_def)
{
struct upipe_speexdsp *upipe_speexdsp = upipe_speexdsp_from_upipe(upipe);
if (flow_def == NULL)
return UBASE_ERR_INVALID;
const char *def;
UBASE_RETURN(uref_flow_get_def(flow_def, &def))
if (unlikely(ubase_ncmp(def, "sound.f32.") &&
ubase_ncmp(def, "sound.s16.")))
return UBASE_ERR_INVALID;
uint8_t in_planes;
if (unlikely(!ubase_check(uref_sound_flow_get_planes(flow_def,
&in_planes))))
return UBASE_ERR_INVALID;
if (in_planes != 1) {
upipe_err(upipe, "only interleaved audio is supported");
return UBASE_ERR_INVALID;
}
if (!ubase_check(uref_sound_flow_get_rate(flow_def,
&upipe_speexdsp->rate))) {
upipe_err(upipe, "no sound rate defined");
uref_dump(flow_def, upipe->uprobe);
return UBASE_ERR_INVALID;
}
uint8_t channels;
if (unlikely(!ubase_check(uref_sound_flow_get_channels(flow_def,
&channels))))
return UBASE_ERR_INVALID;
flow_def = uref_dup(flow_def);
if (unlikely(flow_def == NULL)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
return UBASE_ERR_ALLOC;
}
upipe_speexdsp_require_ubuf_mgr(upipe, flow_def);
if (upipe_speexdsp->ctx)
speex_resampler_destroy(upipe_speexdsp->ctx);
upipe_speexdsp->f32 = !ubase_ncmp(def, "sound.f32.");
int err;
upipe_speexdsp->ctx = speex_resampler_init(channels,
upipe_speexdsp->rate, upipe_speexdsp->rate,
upipe_speexdsp->quality, &err);
if (!upipe_speexdsp->ctx) {
upipe_err_va(upipe, "Could not create resampler: %s",
speex_resampler_strerror(err));
return UBASE_ERR_INVALID;
}
return UBASE_ERR_NONE;
}
/** @internal @This provides a flow format suggestion.
*
* @param upipe description structure of the pipe
* @param request description structure of the request
* @return an error code
*/
static int upipe_speexdsp_provide_flow_format(struct upipe *upipe,
struct urequest *request)
{
const char *def;
UBASE_RETURN(uref_flow_get_def(request->uref, &def))
uint8_t channels;
UBASE_RETURN(uref_sound_flow_get_channels(request->uref, &channels))
uint8_t planes;
UBASE_RETURN(uref_sound_flow_get_planes(request->uref, &planes))
uint8_t sample_size;
UBASE_RETURN(uref_sound_flow_get_sample_size(request->uref, &sample_size))
struct uref *flow = uref_dup(request->uref);
UBASE_ALLOC_RETURN(flow);
uref_sound_flow_clear_format(flow);
uref_sound_flow_set_planes(flow, 0);
uref_sound_flow_set_channels(flow, channels);
uref_sound_flow_add_plane(flow, "all");
if (ubase_ncmp(def, "sound.s16.")) {
uref_flow_set_def(flow, "sound.f32."); /* prefer f32 over s16 */
uref_sound_flow_set_sample_size(flow, 4 * channels);
} else {
uref_flow_set_def(flow, def);
uref_sound_flow_set_sample_size(flow, (planes > 1) ? sample_size :
sample_size / channels);
}
return urequest_provide_flow_format(request, flow);
}
/** @internal @This processes control commands on a speexdsp pipe.
*
* @param upipe description structure of the pipe
* @param command type of command to process
* @param args arguments of the command
* @return an error code
*/
static int upipe_speexdsp_control(struct upipe *upipe, int command, va_list args)
{
struct upipe_speexdsp *upipe_speexdsp = upipe_speexdsp_from_upipe(upipe);
switch (command) {
/* generic commands */
case UPIPE_REGISTER_REQUEST: {
struct urequest *request = va_arg(args, struct urequest *);
if (request->type == UREQUEST_FLOW_FORMAT)
return upipe_speexdsp_provide_flow_format(upipe, request);
if (request->type == UREQUEST_UBUF_MGR)
return upipe_throw_provide_request(upipe, request);
return upipe_speexdsp_alloc_output_proxy(upipe, request);
}
case UPIPE_UNREGISTER_REQUEST: {
struct urequest *request = va_arg(args, struct urequest *);
if (request->type == UREQUEST_FLOW_FORMAT ||
request->type == UREQUEST_UBUF_MGR)
return UBASE_ERR_NONE;
return upipe_speexdsp_free_output_proxy(upipe, request);
}
case UPIPE_GET_OUTPUT: {
struct upipe **p = va_arg(args, struct upipe **);
return upipe_speexdsp_get_output(upipe, p);
}
case UPIPE_SET_OUTPUT: {
struct upipe *output = va_arg(args, struct upipe *);
return upipe_speexdsp_set_output(upipe, output);
}
case UPIPE_GET_FLOW_DEF: {
struct uref **p = va_arg(args, struct uref **);
return upipe_speexdsp_get_flow_def(upipe, p);
}
case UPIPE_SET_FLOW_DEF: {
struct uref *flow = va_arg(args, struct uref *);
return upipe_speexdsp_set_flow_def(upipe, flow);
}
case UPIPE_SET_OPTION: {
const char *option = va_arg(args, const char *);
const char *value = va_arg(args, const char *);
if (strcmp(option, "quality"))
return UBASE_ERR_INVALID;
if (upipe_speexdsp->ctx)
return UBASE_ERR_BUSY;
int quality = atoi(value);
if (quality > SPEEX_RESAMPLER_QUALITY_MAX) {
quality = SPEEX_RESAMPLER_QUALITY_MAX;
upipe_err_va(upipe, "Clamping quality to %d",
SPEEX_RESAMPLER_QUALITY_MAX);
} else if (quality < SPEEX_RESAMPLER_QUALITY_MIN) {
quality = SPEEX_RESAMPLER_QUALITY_MIN;
upipe_err_va(upipe, "Clamping quality to %d",
SPEEX_RESAMPLER_QUALITY_MIN);
}
upipe_speexdsp->quality = quality;
return UBASE_ERR_NONE;
}
default:
return UBASE_ERR_UNHANDLED;
}
}
/** @internal @This allocates a speexdsp pipe.
*
* @param mgr common management structure
* @param uprobe structure used to raise events
* @param signature signature of the pipe allocator
* @param args optional arguments
* @return pointer to upipe or NULL in case of allocation error
*/
static struct upipe *upipe_speexdsp_alloc(struct upipe_mgr *mgr,
struct uprobe *uprobe,
uint32_t signature, va_list args)
{
struct upipe *upipe = upipe_speexdsp_alloc_void(mgr, uprobe, signature,
args);
if (unlikely(upipe == NULL))
return NULL;
struct upipe_speexdsp *upipe_speexdsp = upipe_speexdsp_from_upipe(upipe);
upipe_speexdsp->ctx = NULL;
upipe_speexdsp->drift_rate = (struct urational){ 0, 0 };
upipe_speexdsp->quality = SPEEX_RESAMPLER_QUALITY_MAX;
upipe_speexdsp_init_urefcount(upipe);
upipe_speexdsp_init_ubuf_mgr(upipe);
upipe_speexdsp_init_output(upipe);
upipe_speexdsp_init_flow_def(upipe);
upipe_speexdsp_init_input(upipe);
upipe_throw_ready(upipe);
return upipe;
}
/** @This frees a upipe.
*
* @param upipe description structure of the pipe
*/
static void upipe_speexdsp_free(struct upipe *upipe)
{
struct upipe_speexdsp *upipe_speexdsp = upipe_speexdsp_from_upipe(upipe);
if (likely(upipe_speexdsp->ctx))
speex_resampler_destroy(upipe_speexdsp->ctx);
upipe_throw_dead(upipe);
upipe_speexdsp_clean_input(upipe);
upipe_speexdsp_clean_output(upipe);
upipe_speexdsp_clean_flow_def(upipe);
upipe_speexdsp_clean_ubuf_mgr(upipe);
upipe_speexdsp_clean_urefcount(upipe);
upipe_speexdsp_free_void(upipe);
}
/** module manager static descriptor */
static struct upipe_mgr upipe_speexdsp_mgr = {
.refcount = NULL,
.signature = UPIPE_SPEEXDSP_SIGNATURE,
.upipe_alloc = upipe_speexdsp_alloc,
.upipe_input = upipe_speexdsp_input,
.upipe_control = upipe_speexdsp_control,
.upipe_mgr_control = NULL
};
/** @This returns the management structure for speexdsp pipes
*
* @return pointer to manager
*/
struct upipe_mgr *upipe_speexdsp_mgr_alloc(void)
{
return &upipe_speexdsp_mgr;
}
