mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-01 22:58:50 -04:00
a2dp: refactor codec functions
This commit is contained in:
Wim Taymans
parent
aaffda9d17
commit
574c0afc93
1 changed files with 260 additions and 172 deletions
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@ -53,6 +53,8 @@
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#include "rtp.h"
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#include "a2dp-codecs.h"
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struct codec;
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struct props {
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uint32_t min_latency;
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uint32_t max_latency;
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@ -125,12 +127,11 @@ struct impl {
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uint64_t next_time;
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uint64_t last_error;
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sbc_t sbc;
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int read_size;
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int write_size;
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int write_samples;
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int frame_length;
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int codesize;
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struct codec *codec;
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void *codec_data;
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int block_size;
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int num_blocks;
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uint8_t buffer[4096];
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int buffer_used;
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int frame_count;
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@ -139,11 +140,224 @@ struct impl {
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uint64_t sample_count;
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uint8_t tmp_buffer[512];
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int tmp_buffer_used;
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};
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struct codec {
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void *(*init) (void *config, size_t config_len);
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void (*deinit) (void *data);
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int (*reduce_bitpool) (void *data);
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int (*increase_bitpool) (void *data);
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int (*get_block_size) (void *data);
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int (*get_num_blocks) (void *data, size_t mtu);
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int (*start_encode) (void *data,
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void *dst, size_t dst_size, uint16_t seqnum, uint32_t timestamp);
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int (*encode) (void *data,
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const void *src, size_t src_size,
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void *dst, size_t dst_size,
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size_t *dst_out);
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};
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struct impl_sbc {
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sbc_t sbc;
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struct rtp_header *header;
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struct rtp_payload *payload;
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int codesize;
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int frame_length;
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int min_bitpool;
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int max_bitpool;
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};
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static int codec_sbc_set_bitpool(struct impl_sbc *this, int bitpool)
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{
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if (bitpool < this->min_bitpool)
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bitpool = this->min_bitpool;
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if (bitpool > this->max_bitpool)
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bitpool = this->max_bitpool;
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if (this->sbc.bitpool == bitpool)
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return 0;
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this->sbc.bitpool = bitpool;
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this->codesize = sbc_get_codesize(&this->sbc);
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this->frame_length = sbc_get_frame_length(&this->sbc);
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return 0;
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}
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static int codec_sbc_reduce_bitpool(void *data)
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{
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struct impl_sbc *this = data;
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return codec_sbc_set_bitpool(this, this->sbc.bitpool - 2);
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}
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static int codec_sbc_increase_bitpool(void *data)
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{
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struct impl_sbc *this = data;
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return codec_sbc_set_bitpool(this, this->sbc.bitpool + 1);
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}
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static int codec_sbc_get_num_blocks(void *data, size_t mtu)
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{
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struct impl_sbc *this = data;
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size_t rtp_size = sizeof(struct rtp_header) + sizeof(struct rtp_payload);
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size_t frame_count = (mtu - rtp_size) / this->frame_length;
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/* frame_count is only 4 bit number */
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if (frame_count > 15)
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frame_count = 15;
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return frame_count;
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}
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static int codec_sbc_get_block_size(void *data)
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{
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struct impl_sbc *this = data;
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return this->codesize;
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}
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static void *codec_sbc_init(void *config, size_t config_len)
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{
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struct impl_sbc *this;
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a2dp_sbc_t *conf = config;
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int res;
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this = calloc(1, sizeof(struct impl_sbc));
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if (this == NULL) {
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res = -errno;
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goto error;
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}
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sbc_init(&this->sbc, 0);
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this->sbc.endian = SBC_LE;
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if (conf->frequency & SBC_SAMPLING_FREQ_48000)
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this->sbc.frequency = SBC_FREQ_48000;
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else if (conf->frequency & SBC_SAMPLING_FREQ_44100)
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this->sbc.frequency = SBC_FREQ_44100;
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else if (conf->frequency & SBC_SAMPLING_FREQ_32000)
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this->sbc.frequency = SBC_FREQ_32000;
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else if (conf->frequency & SBC_SAMPLING_FREQ_16000)
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this->sbc.frequency = SBC_FREQ_16000;
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else {
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res = -EINVAL;
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goto error;
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}
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if (conf->channel_mode & SBC_CHANNEL_MODE_JOINT_STEREO)
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this->sbc.mode = SBC_MODE_JOINT_STEREO;
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else if (conf->channel_mode & SBC_CHANNEL_MODE_STEREO)
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this->sbc.mode = SBC_MODE_STEREO;
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else if (conf->channel_mode & SBC_CHANNEL_MODE_DUAL_CHANNEL)
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this->sbc.mode = SBC_MODE_DUAL_CHANNEL;
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else if (conf->channel_mode & SBC_CHANNEL_MODE_MONO)
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this->sbc.mode = SBC_MODE_MONO;
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else {
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res = -EINVAL;
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goto error;
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}
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switch (conf->subbands) {
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case SBC_SUBBANDS_4:
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this->sbc.subbands = SBC_SB_4;
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break;
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case SBC_SUBBANDS_8:
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this->sbc.subbands = SBC_SB_8;
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break;
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default:
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res = -EINVAL;
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goto error;
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}
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if (conf->allocation_method & SBC_ALLOCATION_LOUDNESS)
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this->sbc.allocation = SBC_AM_LOUDNESS;
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else
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this->sbc.allocation = SBC_AM_SNR;
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switch (conf->block_length) {
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case SBC_BLOCK_LENGTH_4:
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this->sbc.blocks = SBC_BLK_4;
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break;
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case SBC_BLOCK_LENGTH_8:
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this->sbc.blocks = SBC_BLK_8;
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break;
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case SBC_BLOCK_LENGTH_12:
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this->sbc.blocks = SBC_BLK_12;
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break;
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case SBC_BLOCK_LENGTH_16:
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this->sbc.blocks = SBC_BLK_16;
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break;
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default:
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res = -EINVAL;
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goto error;
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}
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this->min_bitpool = SPA_MAX(conf->min_bitpool, 12);
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this->max_bitpool = conf->max_bitpool;
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codec_sbc_set_bitpool(this, conf->max_bitpool);
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return this;
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error:
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errno = -res;
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return NULL;
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}
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static void codec_sbc_deinit(void *data)
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{
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struct impl_sbc *this = data;
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sbc_finish(&this->sbc);
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free(this);
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}
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static int codec_sbc_start_encode (void *data,
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void *dst, size_t dst_size, uint16_t seqnum, uint32_t timestamp)
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{
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struct impl_sbc *this = data;
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this->header = (struct rtp_header *)dst;
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this->payload = SPA_MEMBER(dst, sizeof(struct rtp_header), struct rtp_payload);
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memset(this->header, 0, sizeof(struct rtp_header)+sizeof(struct rtp_payload));
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this->payload->frame_count = 0;
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this->header->v = 2;
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this->header->pt = 1;
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this->header->sequence_number = htons(seqnum);
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this->header->timestamp = htonl(timestamp);
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this->header->ssrc = htonl(1);
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return sizeof(struct rtp_header) + sizeof(struct rtp_payload);
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}
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static int codec_sbc_encode(void *data,
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const void *src, size_t src_size,
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void *dst, size_t dst_size,
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size_t *encoded)
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{
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struct impl_sbc *this = data;
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int res;
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res = sbc_encode(&this->sbc, src, src_size,
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dst, dst_size, encoded);
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if (res >= this->codesize)
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this->payload->frame_count += res / this->codesize;
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return res;
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}
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struct codec codec_sbc = {
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.init = codec_sbc_init,
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.deinit = codec_sbc_deinit,
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.reduce_bitpool = codec_sbc_reduce_bitpool,
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.increase_bitpool = codec_sbc_increase_bitpool,
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.get_block_size = codec_sbc_get_block_size,
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.get_num_blocks = codec_sbc_get_num_blocks,
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.start_encode = codec_sbc_start_encode,
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.encode = codec_sbc_encode,
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};
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#define NAME "a2dp-sink"
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#define CHECK_PORT(this,d,p) ((d) == SPA_DIRECTION_INPUT && (p) == 0)
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@ -330,42 +544,28 @@ static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
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static int reset_buffer(struct impl *this)
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{
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this->buffer_used = sizeof(struct rtp_header) + sizeof(struct rtp_payload);
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this->frame_count = 0;
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this->buffer_used = this->codec->start_encode(this->codec_data,
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this->buffer, sizeof(this->buffer),
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this->seqnum++, this->timestamp);
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this->timestamp = this->sample_count;
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return 0;
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}
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static int send_buffer(struct impl *this)
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{
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int written;
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struct rtp_header *header;
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struct rtp_payload *payload;
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spa_return_val_if_fail(this->transport, -EIO);
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header = (struct rtp_header *)this->buffer;
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payload = (struct rtp_payload *)(this->buffer + sizeof(struct rtp_header));
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memset(this->buffer, 0, sizeof(struct rtp_header)+sizeof(struct rtp_payload));
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payload->frame_count = this->frame_count;
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header->v = 2;
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header->pt = 1;
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header->sequence_number = htons(this->seqnum);
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header->timestamp = htonl(this->timestamp);
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header->ssrc = htonl(1);
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spa_log_trace(this->log, NAME " %p: send %d %u %u %u",
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this, this->frame_count, this->seqnum, this->timestamp, this->buffer_used);
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written = send(this->transport->fd, this->buffer, this->buffer_used, MSG_DONTWAIT | MSG_NOSIGNAL);
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spa_log_debug(this->log, NAME " %p: send %d", this, written);
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reset_buffer(this);
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spa_log_debug(this->log, NAME " %p: send %d: %m", this, written);
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if (written < 0)
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return -errno;
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this->timestamp = this->sample_count;
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this->seqnum++;
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reset_buffer(this);
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return written;
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}
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@ -378,32 +578,33 @@ static int encode_buffer(struct impl *this, const void *data, int size)
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int from_size = size;
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spa_log_trace(this->log, NAME " %p: encode %d used %d, %d %d %d/%d",
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this, size, this->buffer_used, port->frame_size, this->write_size,
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this, size, this->buffer_used, port->frame_size, this->block_size,
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this->frame_count, MAX_FRAME_COUNT);
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if (this->frame_count > MAX_FRAME_COUNT)
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return -ENOSPC;
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if (size < this->codesize - this->tmp_buffer_used) {
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if (size < this->block_size - this->tmp_buffer_used) {
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memcpy(this->tmp_buffer + this->tmp_buffer_used, data, size);
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this->tmp_buffer_used += size;
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return size;
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} else if (this->tmp_buffer_used > 0) {
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memcpy(this->tmp_buffer + this->tmp_buffer_used, data, this->codesize - this->tmp_buffer_used);
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memcpy(this->tmp_buffer + this->tmp_buffer_used, data, this->block_size - this->tmp_buffer_used);
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from_data = this->tmp_buffer;
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from_size = this->codesize;
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this->tmp_buffer_used = this->codesize - this->tmp_buffer_used;
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from_size = this->block_size;
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this->tmp_buffer_used = this->block_size - this->tmp_buffer_used;
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}
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processed = sbc_encode(&this->sbc, from_data, from_size,
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this->buffer + this->buffer_used,
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this->write_size - this->buffer_used,
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&out_encoded);
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processed = this->codec->encode(this->codec_data,
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from_data, from_size,
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this->buffer + this->buffer_used,
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sizeof(this->buffer) - this->buffer_used,
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&out_encoded);
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if (processed < 0)
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return processed;
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this->sample_count += processed / port->frame_size;
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this->frame_count += processed / this->codesize;
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this->frame_count += processed / this->block_size;
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this->buffer_used += out_encoded;
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spa_log_trace(this->log, NAME " %p: processed %d %zd used %d",
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@ -418,14 +619,13 @@ static int encode_buffer(struct impl *this, const void *data, int size)
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static bool need_flush(struct impl *this)
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{
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return (this->buffer_used + this->frame_length > this->write_size) ||
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this->frame_count > MAX_FRAME_COUNT;
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return (this->frame_count + 1 >= this->num_blocks);
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}
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static int flush_buffer(struct impl *this, bool force)
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{
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spa_log_trace(this->log, NAME" %p: %d %d %d", this,
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this->buffer_used, this->frame_length, this->write_size);
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spa_log_trace(this->log, NAME" %p: used:%d num_blocks:%d block_size%d", this,
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this->buffer_used, this->num_blocks, this->block_size);
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if (force || need_flush(this))
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return send_buffer(this);
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@ -450,51 +650,6 @@ static int add_data(struct impl *this, const void *data, int size)
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return total;
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}
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static int set_bitpool(struct impl *this, int bitpool)
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{
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struct port *port = &this->port;
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spa_return_val_if_fail(this->transport, -EIO);
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if (bitpool < this->min_bitpool)
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bitpool = this->min_bitpool;
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if (bitpool > this->max_bitpool)
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bitpool = this->max_bitpool;
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if (this->sbc.bitpool == bitpool)
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return 0;
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this->sbc.bitpool = bitpool;
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this->codesize = sbc_get_codesize(&this->sbc);
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/* make sure there's enough space in this->tmp_buffer */
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spa_assert(this->codesize <= 512);
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this->frame_length = sbc_get_frame_length(&this->sbc);
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this->read_size = this->transport->read_mtu
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- sizeof(struct rtp_header) - sizeof(struct rtp_payload) - 24;
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this->write_size = this->transport->write_mtu
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- sizeof(struct rtp_header) - sizeof(struct rtp_payload) - 24;
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this->write_samples = (this->write_size / this->frame_length) *
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(this->codesize / port->frame_size);
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spa_log_info(this->log, NAME" %p: set bitpool %d codesize:%u frame_length:%u",
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this, this->sbc.bitpool, this->codesize, this->frame_length);
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return 0;
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}
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static int reduce_bitpool(struct impl *this)
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{
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return set_bitpool(this, this->sbc.bitpool - 2);
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}
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static int increase_bitpool(struct impl *this)
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{
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return set_bitpool(this, this->sbc.bitpool + 1);
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}
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static void enable_flush(struct impl *this, bool enabled)
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{
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if (SPA_FLAG_IS_SET(this->flush_source.mask, SPA_IO_OUT) != enabled) {
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@ -568,11 +723,11 @@ again:
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spa_log_trace(this->log, NAME " %p: written %u frames", this, total_frames);
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}
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written = flush_buffer(this, false);
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written = flush_buffer(this, true);
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if (written == -EAGAIN) {
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spa_log_trace(this->log, NAME" %p: delay flush", this);
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if (now_time - this->last_error > SPA_NSEC_PER_SEC / 2) {
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reduce_bitpool(this);
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this->codec->reduce_bitpool(this->codec_data);
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this->last_error = now_time;
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}
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enable_flush(this, true);
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@ -584,7 +739,7 @@ again:
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}
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else if (written > 0) {
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if (now_time - this->last_error > SPA_NSEC_PER_SEC) {
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increase_bitpool(this);
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this->codec->increase_bitpool(this->codec_data);
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this->last_error = now_time;
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}
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if (!spa_list_is_empty(&port->ready))
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@ -654,87 +809,6 @@ static void a2dp_on_timeout(struct spa_source *source)
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set_timeout(this, this->next_time);
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}
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static int init_sbc(struct impl *this)
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{
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struct spa_bt_transport *transport = this->transport;
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a2dp_sbc_t *conf;
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spa_return_val_if_fail(transport, -EIO);
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conf = transport->configuration;
|
||||
|
||||
sbc_init(&this->sbc, 0);
|
||||
this->sbc.endian = SBC_LE;
|
||||
|
||||
if (conf->frequency & SBC_SAMPLING_FREQ_48000)
|
||||
this->sbc.frequency = SBC_FREQ_48000;
|
||||
else if (conf->frequency & SBC_SAMPLING_FREQ_44100)
|
||||
this->sbc.frequency = SBC_FREQ_44100;
|
||||
else if (conf->frequency & SBC_SAMPLING_FREQ_32000)
|
||||
this->sbc.frequency = SBC_FREQ_32000;
|
||||
else if (conf->frequency & SBC_SAMPLING_FREQ_16000)
|
||||
this->sbc.frequency = SBC_FREQ_16000;
|
||||
else
|
||||
return -EINVAL;
|
||||
|
||||
if (conf->channel_mode & SBC_CHANNEL_MODE_JOINT_STEREO)
|
||||
this->sbc.mode = SBC_MODE_JOINT_STEREO;
|
||||
else if (conf->channel_mode & SBC_CHANNEL_MODE_STEREO)
|
||||
this->sbc.mode = SBC_MODE_STEREO;
|
||||
else if (conf->channel_mode & SBC_CHANNEL_MODE_DUAL_CHANNEL)
|
||||
this->sbc.mode = SBC_MODE_DUAL_CHANNEL;
|
||||
else if (conf->channel_mode & SBC_CHANNEL_MODE_MONO)
|
||||
this->sbc.mode = SBC_MODE_MONO;
|
||||
else
|
||||
return -EINVAL;
|
||||
|
||||
switch (conf->subbands) {
|
||||
case SBC_SUBBANDS_4:
|
||||
this->sbc.subbands = SBC_SB_4;
|
||||
break;
|
||||
case SBC_SUBBANDS_8:
|
||||
this->sbc.subbands = SBC_SB_8;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (conf->allocation_method & SBC_ALLOCATION_LOUDNESS)
|
||||
this->sbc.allocation = SBC_AM_LOUDNESS;
|
||||
else
|
||||
this->sbc.allocation = SBC_AM_SNR;
|
||||
|
||||
switch (conf->block_length) {
|
||||
case SBC_BLOCK_LENGTH_4:
|
||||
this->sbc.blocks = SBC_BLK_4;
|
||||
break;
|
||||
case SBC_BLOCK_LENGTH_8:
|
||||
this->sbc.blocks = SBC_BLK_8;
|
||||
break;
|
||||
case SBC_BLOCK_LENGTH_12:
|
||||
this->sbc.blocks = SBC_BLK_12;
|
||||
break;
|
||||
case SBC_BLOCK_LENGTH_16:
|
||||
this->sbc.blocks = SBC_BLK_16;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
this->min_bitpool = SPA_MAX(conf->min_bitpool, 12);
|
||||
this->max_bitpool = conf->max_bitpool;
|
||||
|
||||
set_bitpool(this, conf->max_bitpool);
|
||||
|
||||
this->seqnum = 0;
|
||||
|
||||
spa_log_debug(this->log, NAME " %p: codesize %d frame_length %d size %d:%d %d",
|
||||
this, this->codesize, this->frame_length, this->read_size, this->write_size,
|
||||
this->sbc.bitpool);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int do_start(struct impl *this)
|
||||
{
|
||||
int res, val;
|
||||
|
|
@ -752,7 +826,14 @@ static int do_start(struct impl *this)
|
|||
if ((res = spa_bt_transport_acquire(this->transport, false)) < 0)
|
||||
return res;
|
||||
|
||||
init_sbc(this);
|
||||
this->seqnum = 0;
|
||||
|
||||
this->block_size = this->codec->get_block_size(this->codec_data);
|
||||
this->num_blocks = this->codec->get_num_blocks(this->codec_data,
|
||||
this->transport->write_mtu);
|
||||
|
||||
spa_log_debug(this->log, NAME " %p: block_size %d num_blocks:%d", this,
|
||||
this->block_size, this->num_blocks);
|
||||
|
||||
val = FILL_FRAMES * this->transport->write_mtu;
|
||||
if (setsockopt(this->transport->fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof(val)) < 0)
|
||||
|
|
@ -988,7 +1069,7 @@ impl_node_port_enum_params(void *object, int seq,
|
|||
case SPA_PARAM_EnumFormat:
|
||||
if (result.index > 0)
|
||||
return 0;
|
||||
if (this->transport == NULL)
|
||||
if (this->codec_data == NULL)
|
||||
return -EIO;
|
||||
|
||||
switch (this->transport->codec) {
|
||||
|
|
@ -1325,6 +1406,8 @@ static int impl_get_interface(struct spa_handle *handle, const char *type, void
|
|||
static int impl_clear(struct spa_handle *handle)
|
||||
{
|
||||
struct impl *this = (struct impl *) handle;
|
||||
|
||||
this->codec->deinit(this->codec_data);
|
||||
if (this->transport)
|
||||
spa_hook_remove(&this->transport_listener);
|
||||
spa_system_close(this->data_system, this->timerfd);
|
||||
|
|
@ -1417,6 +1500,11 @@ impl_init(const struct spa_handle_factory *factory,
|
|||
this->timerfd = spa_system_timerfd_create(this->data_system,
|
||||
CLOCK_MONOTONIC, SPA_FD_CLOEXEC | SPA_FD_NONBLOCK);
|
||||
|
||||
this->codec = &codec_sbc;
|
||||
|
||||
this->codec_data = this->codec->init(this->transport->configuration,
|
||||
this->transport->configuration_len);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue