mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-04 13:29:59 -05:00
rework memory block management to be thread-safe and mostly lock-free.
pa_memblock is now an opaque structure. Access to its fields is now done through various accessor functions in a thread-safe manner. pa_memblock_acquire() and pa_memblock_release() are now used to access the attached audio data. Why? To allow safe manipulation of the memory pointer maintained by the memory block. Internally _acquire() and _release() maintain a reference counter. Please do not confuse this reference counter whith the one maintained by pa_memblock_ref()/_unref()! As a side effect this patch removes all direct usages of AO_t and replaces it with pa_atomic_xxx based code. This stuff needs some serious testing love. Especially if threads are actively used. git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1404 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
5ad143b3ab
commit
d210ebbb09
36 changed files with 991 additions and 500 deletions
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@ -46,15 +46,27 @@ pa_memblock *pa_silence_memblock_new(pa_mempool *pool, const pa_sample_spec *spe
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}
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pa_memblock *pa_silence_memblock(pa_memblock* b, const pa_sample_spec *spec) {
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assert(b && b->data && spec);
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pa_silence_memory(b->data, b->length, spec);
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void *data;
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assert(b);
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assert(spec);
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data = pa_memblock_acquire(b);
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pa_silence_memory(data, pa_memblock_get_length(b), spec);
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pa_memblock_release(b);
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return b;
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}
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void pa_silence_memchunk(pa_memchunk *c, const pa_sample_spec *spec) {
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assert(c && c->memblock && c->memblock->data && spec && c->length);
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void *data;
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assert(c);
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assert(c->memblock);
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assert(spec);
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pa_silence_memory((uint8_t*) c->memblock->data+c->index, c->length, spec);
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data = pa_memblock_acquire(c->memblock);
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pa_silence_memory((uint8_t*) data+c->index, c->length, spec);
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pa_memblock_release(c->memblock);
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}
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void pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec) {
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@ -82,26 +94,38 @@ void pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec) {
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}
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size_t pa_mix(
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const pa_mix_info streams[],
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unsigned nstreams,
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void *data,
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size_t length,
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const pa_sample_spec *spec,
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const pa_cvolume *volume,
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int mute) {
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assert(streams && data && length && spec);
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pa_mix_info streams[],
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unsigned nstreams,
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void *data,
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size_t length,
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const pa_sample_spec *spec,
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const pa_cvolume *volume,
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int mute) {
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pa_cvolume full_volume;
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size_t d = 0;
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unsigned k;
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assert(streams);
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assert(data);
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assert(length);
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assert(spec);
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if (!volume)
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volume = pa_cvolume_reset(&full_volume, spec->channels);
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for (k = 0; k < nstreams; k++)
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streams[k].internal = pa_memblock_acquire(streams[k].chunk.memblock);
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switch (spec->format) {
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case PA_SAMPLE_S16NE:{
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size_t d;
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unsigned channel = 0;
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for (d = 0;; d += sizeof(int16_t)) {
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int32_t sum = 0;
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if (d >= length)
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return d;
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goto finish;
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if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
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unsigned i;
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@ -111,12 +135,12 @@ size_t pa_mix(
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pa_volume_t cvolume = streams[i].volume.values[channel];
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if (d >= streams[i].chunk.length)
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return d;
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goto finish;
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if (cvolume == PA_VOLUME_MUTED)
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v = 0;
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else {
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v = *((int16_t*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d));
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v = *((int16_t*) ((uint8_t*) streams[i].internal + streams[i].chunk.index + d));
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if (cvolume != PA_VOLUME_NORM)
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v = (int32_t) (v * pa_sw_volume_to_linear(cvolume));
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@ -139,17 +163,18 @@ size_t pa_mix(
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if (++channel >= spec->channels)
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channel = 0;
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}
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break;
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}
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case PA_SAMPLE_S16RE:{
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size_t d;
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unsigned channel = 0;
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for (d = 0;; d += sizeof(int16_t)) {
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int32_t sum = 0;
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if (d >= length)
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return d;
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goto finish;
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if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
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unsigned i;
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@ -159,12 +184,12 @@ size_t pa_mix(
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pa_volume_t cvolume = streams[i].volume.values[channel];
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if (d >= streams[i].chunk.length)
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return d;
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goto finish;
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if (cvolume == PA_VOLUME_MUTED)
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v = 0;
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else {
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v = INT16_SWAP(*((int16_t*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d)));
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v = INT16_SWAP(*((int16_t*) ((uint8_t*) streams[i].internal + streams[i].chunk.index + d)));
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if (cvolume != PA_VOLUME_NORM)
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v = (int32_t) (v * pa_sw_volume_to_linear(cvolume));
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@ -187,17 +212,18 @@ size_t pa_mix(
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if (++channel >= spec->channels)
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channel = 0;
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}
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break;
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}
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case PA_SAMPLE_U8: {
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size_t d;
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unsigned channel = 0;
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for (d = 0;; d ++) {
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int32_t sum = 0;
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if (d >= length)
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return d;
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goto finish;
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if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
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unsigned i;
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@ -207,12 +233,12 @@ size_t pa_mix(
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pa_volume_t cvolume = streams[i].volume.values[channel];
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if (d >= streams[i].chunk.length)
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return d;
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goto finish;
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if (cvolume == PA_VOLUME_MUTED)
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v = 0;
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else {
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v = (int32_t) *((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d) - 0x80;
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v = (int32_t) *((uint8_t*) streams[i].internal + streams[i].chunk.index + d) - 0x80;
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if (cvolume != PA_VOLUME_NORM)
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v = (int32_t) (v * pa_sw_volume_to_linear(cvolume));
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@ -235,17 +261,18 @@ size_t pa_mix(
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if (++channel >= spec->channels)
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channel = 0;
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}
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break;
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}
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case PA_SAMPLE_FLOAT32NE: {
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size_t d;
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unsigned channel = 0;
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for (d = 0;; d += sizeof(float)) {
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float sum = 0;
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if (d >= length)
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return d;
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goto finish;
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if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
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unsigned i;
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@ -255,12 +282,12 @@ size_t pa_mix(
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pa_volume_t cvolume = streams[i].volume.values[channel];
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if (d >= streams[i].chunk.length)
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return d;
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goto finish;
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if (cvolume == PA_VOLUME_MUTED)
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v = 0;
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else {
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v = *((float*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d));
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v = *((float*) ((uint8_t*) streams[i].internal + streams[i].chunk.index + d));
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if (cvolume != PA_VOLUME_NORM)
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v *= pa_sw_volume_to_linear(cvolume);
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@ -279,17 +306,34 @@ size_t pa_mix(
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if (++channel >= spec->channels)
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channel = 0;
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}
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break;
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}
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default:
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pa_log_error("ERROR: Unable to mix audio data of format %s.", pa_sample_format_to_string(spec->format));
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abort();
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}
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finish:
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for (k = 0; k < nstreams; k++)
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pa_memblock_release(streams[k].chunk.memblock);
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return d;
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}
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void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvolume *volume) {
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assert(c && spec && (c->length % pa_frame_size(spec) == 0));
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void pa_volume_memchunk(
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pa_memchunk*c,
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const pa_sample_spec *spec,
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const pa_cvolume *volume) {
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void *ptr;
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assert(c);
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assert(spec);
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assert(c->length % pa_frame_size(spec) == 0);
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assert(volume);
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if (pa_cvolume_channels_equal_to(volume, PA_VOLUME_NORM))
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@ -300,6 +344,8 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
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return;
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}
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ptr = pa_memblock_acquire(c->memblock);
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switch (spec->format) {
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case PA_SAMPLE_S16NE: {
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int16_t *d;
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@ -310,7 +356,7 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
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for (channel = 0; channel < spec->channels; channel++)
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linear[channel] = pa_sw_volume_to_linear(volume->values[channel]);
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for (channel = 0, d = (int16_t*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
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for (channel = 0, d = (int16_t*) ((uint8_t*) ptr + c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
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int32_t t = (int32_t)(*d);
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t = (int32_t) (t * linear[channel]);
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@ -335,7 +381,7 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
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for (channel = 0; channel < spec->channels; channel++)
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linear[channel] = pa_sw_volume_to_linear(volume->values[channel]);
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for (channel = 0, d = (int16_t*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
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for (channel = 0, d = (int16_t*) ((uint8_t*) ptr + c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
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int32_t t = (int32_t)(INT16_SWAP(*d));
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t = (int32_t) (t * linear[channel]);
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@ -357,7 +403,7 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
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size_t n;
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unsigned channel = 0;
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for (d = (uint8_t*) c->memblock->data + c->index, n = c->length; n > 0; d++, n--) {
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for (d = (uint8_t*) ptr + c->index, n = c->length; n > 0; d++, n--) {
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int32_t t = (int32_t) *d - 0x80;
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t = (int32_t) (t * pa_sw_volume_to_linear(volume->values[channel]));
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@ -379,7 +425,7 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
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unsigned n;
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unsigned channel;
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d = (float*) ((uint8_t*) c->memblock->data + c->index);
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d = (float*) ((uint8_t*) ptr + c->index);
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skip = spec->channels * sizeof(float);
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n = c->length/sizeof(float)/spec->channels;
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@ -402,5 +448,7 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
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pa_sample_format_to_string(spec->format));
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abort();
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}
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pa_memblock_release(c->memblock);
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}
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