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提交 4ccf928e 编写于 作者: J jp9000
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libobs/media-io: Remove obsolete mixing functions 

Also, Remove the volume level processing from audio-io.c, it was moved
to obs_source instead.
上级 5cd64ce7
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Showing with 15 addition and 209 deletion
libobs/media-io/audio-io.c
浏览文件 @ 4ccf928e
......@@ -181,78 +181,9 @@ static inline size_t min_size(size_t a, size_t b)
((val > maxval) ? maxval : ((val < minval) ? minval : val))
#endif
#define MIN_S8 -128
#define MAX_S8 127
#define MIN_S16 -32767
#define MAX_S16 32767
#define MIN_S32 -2147483647
#define MAX_S32 2147483647
#define MIX_BUFFER_SIZE 256
/* TODO: optimize mixing */
static void mix_u8(uint8_t *mix, struct circlebuf *buf, size_t size)
{
uint8_t vals[MIX_BUFFER_SIZE];
register int16_t mix_val;
while (size) {
size_t pop_count = min_size(size, sizeof(vals));
size -= pop_count;
circlebuf_pop_front(buf, vals, pop_count);
for (size_t i = 0; i < pop_count; i++) {
mix_val = (int16_t)*mix - 128;
mix_val += (int16_t)vals[i] - 128;
mix_val = CLAMP(mix_val, MIN_S8, MAX_S8) + 128;
*(mix++) = (uint8_t)mix_val;
}
}
}
static void mix_s16(uint8_t *mix_in, struct circlebuf *buf, size_t size)
{
int16_t *mix = (int16_t*)mix_in;
int16_t vals[MIX_BUFFER_SIZE];
register int32_t mix_val;
while (size) {
size_t pop_count = min_size(size, sizeof(vals));
size -= pop_count;
circlebuf_pop_front(buf, vals, pop_count);
pop_count /= sizeof(int16_t);
for (size_t i = 0; i < pop_count; i++) {
mix_val = (int32_t)*mix;
mix_val += (int32_t)vals[i];
*(mix++) = (int16_t)CLAMP(mix_val, MIN_S16, MAX_S16);
}
}
}
static void mix_s32(uint8_t *mix_in, struct circlebuf *buf, size_t size)
{
int32_t *mix = (int32_t*)mix_in;
int32_t vals[MIX_BUFFER_SIZE];
register int64_t mix_val;
while (size) {
size_t pop_count = min_size(size, sizeof(vals));
size -= pop_count;
circlebuf_pop_front(buf, vals, pop_count);
pop_count /= sizeof(int32_t);
for (size_t i = 0; i < pop_count; i++) {
mix_val = (int64_t)*mix;
mix_val += (int64_t)vals[i];
*(mix++) = (int32_t)CLAMP(mix_val, MIN_S32, MAX_S32);
}
}
}
static void mix_float(uint8_t *mix_in, struct circlebuf *buf, size_t size)
{
float *mix = (float*)mix_in;
......@@ -273,31 +204,6 @@ static void mix_float(uint8_t *mix_in, struct circlebuf *buf, size_t size)
}
}
static inline void mix_audio(enum audio_format format,
uint8_t *mix, struct circlebuf *buf, size_t size)
{
switch (format) {
case AUDIO_FORMAT_UNKNOWN:
break;
case AUDIO_FORMAT_U8BIT:
case AUDIO_FORMAT_U8BIT_PLANAR:
mix_u8(mix, buf, size); break;
case AUDIO_FORMAT_16BIT:
case AUDIO_FORMAT_16BIT_PLANAR:
mix_s16(mix, buf, size); break;
case AUDIO_FORMAT_32BIT:
case AUDIO_FORMAT_32BIT_PLANAR:
mix_s32(mix, buf, size); break;
case AUDIO_FORMAT_FLOAT:
case AUDIO_FORMAT_FLOAT_PLANAR:
mix_float(mix, buf, size); break;
}
}
static inline bool mix_audio_line(struct audio_output *audio,
struct audio_line *line, size_t size, uint64_t timestamp)
{
......@@ -315,8 +221,7 @@ static inline bool mix_audio_line(struct audio_output *audio,
for (size_t i = 0; i < audio->planes; i++) {
size_t pop_size = min_size(size, line->buffers[i].size);
mix_audio(audio->info.format,
audio->mix_buffers[i].array + time_offset,
mix_float(audio->mix_buffers[i].array + time_offset,
&line->buffers[i], pop_size);
}
......@@ -711,100 +616,16 @@ uint32_t audio_output_samplerate(audio_t audio)
return audio ? audio->info.samples_per_sec : 0;
}
/* TODO: Optimization of volume multiplication functions */
static inline int mul_vol_u8bit(void *array, float volume, size_t total_num)
{
uint8_t *vals = array;
int32_t vol = (int32_t)(volume * 127.0f);
for (size_t i = 0; i < total_num; i++) {
int32_t val = (int32_t)vals[i] - 128;
int32_t output = val * vol / 127;
vals[i] = (uint8_t)(CLAMP(output, MIN_S8, MAX_S8) + 128);
}
return 0;
}
static inline int mul_vol_16bit(void *array, float volume, size_t total_num)
{
uint16_t *vals = array;
int64_t vol = (int64_t)(volume * 32767.0f);
for (size_t i = 0; i < total_num; i++) {
int64_t output = (int64_t)vals[i] * vol / 32767;
vals[i] = (int32_t)CLAMP(output, MIN_S16, MAX_S16);
}
return 0;
}
static inline float conv_24bit_to_float(uint8_t *vals)
{
int32_t val = ((int32_t)vals[0]) |
((int32_t)vals[1] << 8) |
((int32_t)vals[2] << 16);
if ((val & 0x800000) != 0)
val |= 0xFF000000;
return (float)val / 8388607.0f;
}
static inline void conv_float_to_24bit(float fval, uint8_t *vals)
{
int32_t val = (int32_t)(fval * 8388607.0f);
vals[0] = (val) & 0xFF;
vals[1] = (val >> 8) & 0xFF;
vals[2] = (val >> 16) & 0xFF;
}
static inline int mul_vol_24bit(void *array, float volume, size_t total_num)
{
uint8_t *vals = array;
for (size_t i = 0; i < total_num; i++) {
float val = conv_24bit_to_float(vals) * volume;
conv_float_to_24bit(CLAMP(val, -1.0f, 1.0f), vals);
vals += 3;
}
return 0;
}
static inline int mul_vol_32bit(void *array, float volume, size_t total_num)
{
int32_t *vals = array;
double dvol = (double)volume;
for (size_t i = 0; i < total_num; i++) {
double val = (double)vals[i] / 2147483647.0;
double output = val * dvol;
vals[i] = (int32_t)(CLAMP(output, -1.0, 1.0) * 2147483647.0);
}
return 0;
}
static inline int mul_vol_float(void *array, float volume, size_t total_num)
/* TODO: optimize these two functions */
static inline void mul_vol_float(float *array, float volume, size_t count)
{
float maxVol = 0;
float *vals = array;
for (size_t i = 0; i < total_num; i++) {
vals[i] *= volume;
maxVol = fmaxf(maxVol, (float)fabs(vals[i]));
}
return (int)(maxVol * 10000.f);
for (size_t i = 0; i < count; i++)
array[i] *= volume;
}
/* [Danni] changed to int for volume feedback. Seems like the most logical
place to calculate this to avoid unnessisary iterations.
scaled to max of 10000. */
static int audio_line_place_data_pos(struct audio_line *line,
static void audio_line_place_data_pos(struct audio_line *line,
const struct audio_data *data, size_t position)
{
int maxVol = 0;
bool planar = line->audio->planes > 1;
size_t total_num = data->frames * (planar ? 1 : line->audio->channels);
size_t total_size = data->frames * line->audio->block_size;
......@@ -816,35 +637,22 @@ static int audio_line_place_data_pos(struct audio_line *line,
uint8_t *array = line->volume_buffers[i].array;
switch (line->audio->info.format) {
case AUDIO_FORMAT_U8BIT:
case AUDIO_FORMAT_U8BIT_PLANAR:
maxVol = mul_vol_u8bit(array, data->volume, total_num);
break;
case AUDIO_FORMAT_16BIT:
case AUDIO_FORMAT_16BIT_PLANAR:
maxVol = mul_vol_16bit(array, data->volume, total_num);
break;
case AUDIO_FORMAT_32BIT:
case AUDIO_FORMAT_32BIT_PLANAR:
maxVol = mul_vol_32bit(array, data->volume, total_num);
break;
case AUDIO_FORMAT_FLOAT:
case AUDIO_FORMAT_FLOAT_PLANAR:
maxVol = mul_vol_float(array, data->volume, total_num);
mul_vol_float((float*)array, data->volume, total_num);
break;
case AUDIO_FORMAT_UNKNOWN:
blog(LOG_ERROR, "audio_line_place_data_pos: "
"Unknown format");
"Unsupported or unknown format");
break;
}
circlebuf_place(&line->buffers[i], position,
line->volume_buffers[i].array, total_size);
}
return maxVol;
}
static int audio_line_place_data(struct audio_line *line,
static void audio_line_place_data(struct audio_line *line,
const struct audio_data *data)
{
size_t pos = ts_diff_bytes(line->audio, data->timestamp,
......@@ -858,26 +666,25 @@ static int audio_line_place_data(struct audio_line *line,
line->buffers[0].size);
#endif
return audio_line_place_data_pos(line, data, pos);
audio_line_place_data_pos(line, data, pos);
}
int audio_line_output(audio_line_t line, const struct audio_data *data)
void audio_line_output(audio_line_t line, const struct audio_data *data)
{
/* TODO: prevent insertation of data too far away from expected
* audio timing */
if (!line || !data) return 0;
if (!line || !data) return;
int maxVol = 0;
pthread_mutex_lock(&line->mutex);
if (!line->buffers[0].size) {
line->base_timestamp = data->timestamp -
line->audio->info.buffer_ms * 1000000;
maxVol = audio_line_place_data(line, data);
audio_line_place_data(line, data);
} else if (line->base_timestamp <= data->timestamp) {
maxVol = audio_line_place_data(line, data);
audio_line_place_data(line, data);
} else {
blog(LOG_DEBUG, "Bad timestamp for audio line '%s', "
......@@ -889,5 +696,4 @@ int audio_line_output(audio_line_t line, const struct audio_data *data)
}
pthread_mutex_unlock(&line->mutex);
return maxVol;
}
libobs/media-io/audio-io.h
浏览文件 @ 4ccf928e
......@@ -190,7 +190,7 @@ EXPORT const struct audio_output_info *audio_output_getinfo(audio_t audio);
EXPORT audio_line_t audio_output_createline(audio_t audio, const char *name);
EXPORT void audio_line_destroy(audio_line_t line);
EXPORT int audio_line_output(audio_line_t line, const struct audio_data *data);
EXPORT void audio_line_output(audio_line_t line, const struct audio_data *data);
#ifdef __cplusplus
......
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