| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "a2dp_aac_encoder" |
| |
| #include "a2dp_aac_encoder.h" |
| |
| #include <inttypes.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include <aacenc_lib.h> |
| #include <base/logging.h> |
| |
| #include "a2dp_aac.h" |
| #include "bt_common.h" |
| #include "osi/include/log.h" |
| #include "osi/include/osi.h" |
| |
| // |
| // Encoder for AAC Source Codec |
| // |
| |
| // A2DP AAC encoder interval in milliseconds |
| #define A2DP_AAC_ENCODER_INTERVAL_MS 20 |
| |
| // offset |
| #if (BTA_AV_CO_CP_SCMS_T == TRUE) |
| #define A2DP_AAC_OFFSET (AVDT_MEDIA_OFFSET + 1) |
| #else |
| #define A2DP_AAC_OFFSET AVDT_MEDIA_OFFSET |
| #endif |
| |
| typedef struct { |
| uint32_t sample_rate; |
| uint8_t channel_mode; |
| uint8_t bits_per_sample; |
| uint32_t frame_length; // Samples per channel in a frame |
| uint8_t input_channels_n; // Number of channels |
| int max_encoded_buffer_bytes; // Max encoded bytes per frame |
| } tA2DP_AAC_ENCODER_PARAMS; |
| |
| typedef struct { |
| uint32_t counter; |
| uint32_t bytes_per_tick; /* pcm bytes read each media task tick */ |
| uint64_t last_frame_us; |
| } tA2DP_AAC_FEEDING_STATE; |
| |
| typedef struct { |
| uint64_t session_start_us; |
| |
| size_t media_read_total_expected_packets; |
| size_t media_read_total_expected_reads_count; |
| size_t media_read_total_expected_read_bytes; |
| |
| size_t media_read_total_dropped_packets; |
| size_t media_read_total_actual_reads_count; |
| size_t media_read_total_actual_read_bytes; |
| } a2dp_aac_encoder_stats_t; |
| |
| typedef struct { |
| a2dp_source_read_callback_t read_callback; |
| a2dp_source_enqueue_callback_t enqueue_callback; |
| uint16_t TxAaMtuSize; |
| |
| bool use_SCMS_T; |
| bool is_peer_edr; // True if the peer device supports EDR |
| bool peer_supports_3mbps; // True if the peer device supports 3Mbps EDR |
| uint16_t peer_mtu; // MTU of the A2DP peer |
| uint32_t timestamp; // Timestamp for the A2DP frames |
| |
| HANDLE_AACENCODER aac_handle; |
| bool has_aac_handle; // True if aac_handle is valid |
| |
| tA2DP_FEEDING_PARAMS feeding_params; |
| tA2DP_AAC_ENCODER_PARAMS aac_encoder_params; |
| tA2DP_AAC_FEEDING_STATE aac_feeding_state; |
| |
| a2dp_aac_encoder_stats_t stats; |
| } tA2DP_AAC_ENCODER_CB; |
| |
| static tA2DP_AAC_ENCODER_CB a2dp_aac_encoder_cb; |
| |
| static void a2dp_aac_encoder_update(uint16_t peer_mtu, |
| A2dpCodecConfig* a2dp_codec_config, |
| bool* p_restart_input, |
| bool* p_restart_output, |
| bool* p_config_updated); |
| static void a2dp_aac_get_num_frame_iteration(uint8_t* num_of_iterations, |
| uint8_t* num_of_frames, |
| uint64_t timestamp_us); |
| static void a2dp_aac_encode_frames(uint8_t nb_frame); |
| static bool a2dp_aac_read_feeding(uint8_t* read_buffer); |
| |
| bool A2DP_LoadEncoderAac(void) { |
| // Nothing to do - the library is statically linked |
| return true; |
| } |
| |
| void A2DP_UnloadEncoderAac(void) { |
| // Nothing to do - the library is statically linked |
| if (a2dp_aac_encoder_cb.has_aac_handle) |
| aacEncClose(&a2dp_aac_encoder_cb.aac_handle); |
| memset(&a2dp_aac_encoder_cb, 0, sizeof(a2dp_aac_encoder_cb)); |
| } |
| |
| void a2dp_aac_encoder_init(const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, |
| A2dpCodecConfig* a2dp_codec_config, |
| a2dp_source_read_callback_t read_callback, |
| a2dp_source_enqueue_callback_t enqueue_callback) { |
| if (a2dp_aac_encoder_cb.has_aac_handle) |
| aacEncClose(&a2dp_aac_encoder_cb.aac_handle); |
| memset(&a2dp_aac_encoder_cb, 0, sizeof(a2dp_aac_encoder_cb)); |
| |
| a2dp_aac_encoder_cb.stats.session_start_us = time_get_os_boottime_us(); |
| |
| a2dp_aac_encoder_cb.read_callback = read_callback; |
| a2dp_aac_encoder_cb.enqueue_callback = enqueue_callback; |
| a2dp_aac_encoder_cb.is_peer_edr = p_peer_params->is_peer_edr; |
| a2dp_aac_encoder_cb.peer_supports_3mbps = p_peer_params->peer_supports_3mbps; |
| a2dp_aac_encoder_cb.peer_mtu = p_peer_params->peer_mtu; |
| a2dp_aac_encoder_cb.timestamp = 0; |
| |
| a2dp_aac_encoder_cb.use_SCMS_T = false; // TODO: should be a parameter |
| #if (BTA_AV_CO_CP_SCMS_T == TRUE) |
| a2dp_aac_encoder_cb.use_SCMS_T = true; |
| #endif |
| |
| // NOTE: Ignore the restart_input / restart_output flags - this initization |
| // happens when the connection is (re)started. |
| bool restart_input = false; |
| bool restart_output = false; |
| bool config_updated = false; |
| a2dp_aac_encoder_update(a2dp_aac_encoder_cb.peer_mtu, a2dp_codec_config, |
| &restart_input, &restart_output, &config_updated); |
| } |
| |
| bool A2dpCodecConfigAac::updateEncoderUserConfig( |
| const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, bool* p_restart_input, |
| bool* p_restart_output, bool* p_config_updated) { |
| a2dp_aac_encoder_cb.is_peer_edr = p_peer_params->is_peer_edr; |
| a2dp_aac_encoder_cb.peer_supports_3mbps = p_peer_params->peer_supports_3mbps; |
| a2dp_aac_encoder_cb.peer_mtu = p_peer_params->peer_mtu; |
| a2dp_aac_encoder_cb.timestamp = 0; |
| |
| if (a2dp_aac_encoder_cb.peer_mtu == 0) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot update the codec encoder for %s: " |
| "invalid peer MTU", |
| __func__, name().c_str()); |
| return false; |
| } |
| |
| a2dp_aac_encoder_update(a2dp_aac_encoder_cb.peer_mtu, this, p_restart_input, |
| p_restart_output, p_config_updated); |
| return true; |
| } |
| |
| // Update the A2DP AAC encoder. |
| // |peer_mtu| is the peer MTU. |
| // |a2dp_codec_config| is the A2DP codec to use for the update. |
| static void a2dp_aac_encoder_update(uint16_t peer_mtu, |
| A2dpCodecConfig* a2dp_codec_config, |
| bool* p_restart_input, |
| bool* p_restart_output, |
| bool* p_config_updated) { |
| tA2DP_AAC_ENCODER_PARAMS* p_encoder_params = |
| &a2dp_aac_encoder_cb.aac_encoder_params; |
| uint8_t codec_info[AVDT_CODEC_SIZE]; |
| AACENC_ERROR aac_error; |
| int aac_param_value, aac_sampling_freq, aac_peak_bit_rate; |
| |
| *p_restart_input = false; |
| *p_restart_output = false; |
| *p_config_updated = false; |
| |
| if (!a2dp_aac_encoder_cb.has_aac_handle) { |
| AACENC_ERROR aac_error = aacEncOpen(&a2dp_aac_encoder_cb.aac_handle, 0, |
| 2 /* max 2 channels: stereo */); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, "%s: Cannot open AAC encoder handle: AAC error 0x%x", |
| __func__, aac_error); |
| return; // TODO: Return an error? |
| } |
| a2dp_aac_encoder_cb.has_aac_handle = true; |
| } |
| |
| if (!a2dp_codec_config->copyOutOtaCodecConfig(codec_info)) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot update the codec encoder for %s: " |
| "invalid codec config", |
| __func__, a2dp_codec_config->name().c_str()); |
| return; |
| } |
| const uint8_t* p_codec_info = codec_info; |
| |
| // The feeding parameters |
| tA2DP_FEEDING_PARAMS* p_feeding_params = &a2dp_aac_encoder_cb.feeding_params; |
| p_feeding_params->sample_rate = A2DP_GetTrackSampleRateAac(p_codec_info); |
| p_feeding_params->bits_per_sample = |
| a2dp_codec_config->getAudioBitsPerSample(); |
| p_feeding_params->channel_count = A2DP_GetTrackChannelCountAac(p_codec_info); |
| LOG_DEBUG(LOG_TAG, "%s: sample_rate=%u bits_per_sample=%u channel_count=%u", |
| __func__, p_feeding_params->sample_rate, |
| p_feeding_params->bits_per_sample, p_feeding_params->channel_count); |
| |
| // The codec parameters |
| p_encoder_params->sample_rate = |
| a2dp_aac_encoder_cb.feeding_params.sample_rate; |
| p_encoder_params->channel_mode = A2DP_GetChannelModeCodeAac(p_codec_info); |
| |
| uint16_t mtu_size = BT_DEFAULT_BUFFER_SIZE - A2DP_AAC_OFFSET - sizeof(BT_HDR); |
| if (mtu_size < peer_mtu) { |
| a2dp_aac_encoder_cb.TxAaMtuSize = mtu_size; |
| } else { |
| a2dp_aac_encoder_cb.TxAaMtuSize = peer_mtu; |
| } |
| |
| LOG_DEBUG(LOG_TAG, "%s: MTU=%d, peer_mtu=%d", __func__, |
| a2dp_aac_encoder_cb.TxAaMtuSize, peer_mtu); |
| LOG_DEBUG(LOG_TAG, "%s: sample_rate: %d channel_mode: %d ", __func__, |
| p_encoder_params->sample_rate, p_encoder_params->channel_mode); |
| |
| // Set the encoder's parameters: Audio Object Type - MANDATORY |
| // A2DP_AAC_OBJECT_TYPE_MPEG2_LC -> AOT_AAC_LC |
| // A2DP_AAC_OBJECT_TYPE_MPEG4_LC -> AOT_AAC_LC |
| // A2DP_AAC_OBJECT_TYPE_MPEG4_LTP -> AOT_AAC_LTP |
| // A2DP_AAC_OBJECT_TYPE_MPEG4_SCALABLE -> AOT_AAC_SCAL |
| aac_param_value = AOT_AAC_LC; |
| int object_type = A2DP_GetObjectTypeCodeAac(p_codec_info); |
| switch (object_type) { |
| case A2DP_AAC_OBJECT_TYPE_MPEG2_LC: |
| aac_param_value = AOT_AAC_LC; |
| break; |
| case A2DP_AAC_OBJECT_TYPE_MPEG4_LC: |
| aac_param_value = AOT_AAC_LC; |
| break; |
| case A2DP_AAC_OBJECT_TYPE_MPEG4_LTP: |
| aac_param_value = AOT_AAC_LTP; |
| break; |
| case A2DP_AAC_OBJECT_TYPE_MPEG4_SCALABLE: |
| aac_param_value = AOT_AAC_SCAL; |
| break; |
| default: |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_AOT: " |
| "invalid object type %d", |
| __func__, object_type); |
| return; // TODO: Return an error? |
| } |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, AACENC_AOT, |
| aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_AOT to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: audioMuxVersion |
| aac_param_value = 2; // audioMuxVersion = "2" |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_AUDIOMUXVER, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_AUDIOMUXVER to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: Signaling mode of the extension AOT |
| aac_param_value = 1; // Signaling mode of the extension AOT = 1 |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_SIGNALING_MODE, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_SIGNALING_MODE to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: Sample Rate - MANDATORY |
| aac_param_value = A2DP_GetTrackSampleRateAac(p_codec_info); |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_SAMPLERATE, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_SAMPLERATE to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| aac_sampling_freq = aac_param_value; // Save for extra usage below |
| |
| // Set the encoder's parameters: Bit Rate - MANDATORY |
| aac_param_value = A2DP_GetBitRateAac(p_codec_info); |
| // Calculate the bit rate from MTU and sampling frequency |
| aac_peak_bit_rate = |
| A2DP_ComputeMaxBitRateAac(p_codec_info, a2dp_aac_encoder_cb.TxAaMtuSize); |
| aac_param_value = std::min(aac_param_value, aac_peak_bit_rate); |
| LOG_DEBUG(LOG_TAG, "%s: MTU = %d Sampling Frequency = %d Bit Rate = %d", |
| __func__, a2dp_aac_encoder_cb.TxAaMtuSize, aac_sampling_freq, |
| aac_param_value); |
| if (aac_param_value == -1) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_BITRATE: " |
| "invalid codec bit rate", |
| __func__); |
| return; // TODO: Return an error? |
| } |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_BITRATE, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_BITRATE to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: PEAK Bit Rate |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_PEAK_BITRATE, aac_peak_bit_rate); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_PEAK_BITRATE to %d: " |
| "AAC error 0x%x", |
| __func__, aac_peak_bit_rate, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: Channel Mode - MANDATORY |
| if (A2DP_GetTrackChannelCountAac(p_codec_info) == 1) { |
| aac_param_value = MODE_1; // Mono |
| } else { |
| aac_param_value = MODE_2; // Stereo |
| } |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_CHANNELMODE, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_CHANNELMODE to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: Transport Type |
| aac_param_value = TT_MP4_LATM_MCP1; // muxConfigPresent = 1 |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_TRANSMUX, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_TRANSMUX to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: Header Period |
| aac_param_value = 1; |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_HEADER_PERIOD, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_HEADER_PERIOD to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Set the encoder's parameters: Variable Bit Rate Support |
| aac_param_value = A2DP_GetVariableBitRateSupportAac(p_codec_info); |
| if (aac_param_value == -1) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_BITRATEMODE: " |
| "invalid codec bit rate mode", |
| __func__); |
| return; // TODO: Return an error? |
| } |
| aac_error = aacEncoder_SetParam(a2dp_aac_encoder_cb.aac_handle, |
| AACENC_BITRATEMODE, aac_param_value); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot set AAC parameter AACENC_BITRATEMODE to %d: " |
| "AAC error 0x%x", |
| __func__, aac_param_value, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Mark the end of setting the encoder's parameters |
| aac_error = |
| aacEncEncode(a2dp_aac_encoder_cb.aac_handle, NULL, NULL, NULL, NULL); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot complete setting the AAC parameters: AAC error 0x%x", |
| __func__, aac_error); |
| return; // TODO: Return an error? |
| } |
| |
| // Retrieve the encoder info so we can save the frame length |
| AACENC_InfoStruct aac_info; |
| aac_error = aacEncInfo(a2dp_aac_encoder_cb.aac_handle, &aac_info); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, |
| "%s: Cannot retrieve the AAC encoder info: AAC error 0x%x", |
| __func__, aac_error); |
| return; // TODO: Return an error? |
| } |
| p_encoder_params->frame_length = aac_info.frameLength; |
| p_encoder_params->input_channels_n = aac_info.inputChannels; |
| p_encoder_params->max_encoded_buffer_bytes = aac_info.maxOutBufBytes; |
| LOG_DEBUG(LOG_TAG, |
| "%s: AAC frame_length = %u input_channels_n = %u " |
| "max_encoded_buffer_bytes = %d", |
| __func__, p_encoder_params->frame_length, |
| p_encoder_params->input_channels_n, |
| p_encoder_params->max_encoded_buffer_bytes); |
| } |
| |
| void a2dp_aac_encoder_cleanup(void) { |
| if (a2dp_aac_encoder_cb.has_aac_handle) |
| aacEncClose(&a2dp_aac_encoder_cb.aac_handle); |
| memset(&a2dp_aac_encoder_cb, 0, sizeof(a2dp_aac_encoder_cb)); |
| } |
| |
| void a2dp_aac_feeding_reset(void) { |
| /* By default, just clear the entire state */ |
| memset(&a2dp_aac_encoder_cb.aac_feeding_state, 0, |
| sizeof(a2dp_aac_encoder_cb.aac_feeding_state)); |
| |
| a2dp_aac_encoder_cb.aac_feeding_state.bytes_per_tick = |
| (a2dp_aac_encoder_cb.feeding_params.sample_rate * |
| a2dp_aac_encoder_cb.feeding_params.bits_per_sample / 8 * |
| a2dp_aac_encoder_cb.feeding_params.channel_count * |
| A2DP_AAC_ENCODER_INTERVAL_MS) / |
| 1000; |
| |
| LOG_DEBUG(LOG_TAG, "%s: PCM bytes per tick %u", __func__, |
| a2dp_aac_encoder_cb.aac_feeding_state.bytes_per_tick); |
| } |
| |
| void a2dp_aac_feeding_flush(void) { |
| a2dp_aac_encoder_cb.aac_feeding_state.counter = 0; |
| } |
| |
| period_ms_t a2dp_aac_get_encoder_interval_ms(void) { |
| return A2DP_AAC_ENCODER_INTERVAL_MS; |
| } |
| |
| void a2dp_aac_send_frames(uint64_t timestamp_us) { |
| uint8_t nb_frame = 0; |
| uint8_t nb_iterations = 0; |
| |
| a2dp_aac_get_num_frame_iteration(&nb_iterations, &nb_frame, timestamp_us); |
| LOG_VERBOSE(LOG_TAG, "%s: Sending %d frames per iteration, %d iterations", |
| __func__, nb_frame, nb_iterations); |
| if (nb_frame == 0) return; |
| |
| for (uint8_t counter = 0; counter < nb_iterations; counter++) { |
| // Transcode frame and enqueue |
| a2dp_aac_encode_frames(nb_frame); |
| } |
| } |
| |
| // Obtains the number of frames to send and number of iterations |
| // to be used. |num_of_iterations| and |num_of_frames| parameters |
| // are used as output param for returning the respective values. |
| static void a2dp_aac_get_num_frame_iteration(uint8_t* num_of_iterations, |
| uint8_t* num_of_frames, |
| uint64_t timestamp_us) { |
| uint32_t result = 0; |
| uint8_t nof = 0; |
| uint8_t noi = 1; |
| |
| uint32_t pcm_bytes_per_frame = |
| a2dp_aac_encoder_cb.aac_encoder_params.frame_length * |
| a2dp_aac_encoder_cb.feeding_params.channel_count * |
| a2dp_aac_encoder_cb.feeding_params.bits_per_sample / 8; |
| LOG_VERBOSE(LOG_TAG, "%s: pcm_bytes_per_frame %u", __func__, |
| pcm_bytes_per_frame); |
| |
| uint32_t us_this_tick = A2DP_AAC_ENCODER_INTERVAL_MS * 1000; |
| uint64_t now_us = timestamp_us; |
| if (a2dp_aac_encoder_cb.aac_feeding_state.last_frame_us != 0) |
| us_this_tick = |
| (now_us - a2dp_aac_encoder_cb.aac_feeding_state.last_frame_us); |
| a2dp_aac_encoder_cb.aac_feeding_state.last_frame_us = now_us; |
| |
| a2dp_aac_encoder_cb.aac_feeding_state.counter += |
| a2dp_aac_encoder_cb.aac_feeding_state.bytes_per_tick * us_this_tick / |
| (A2DP_AAC_ENCODER_INTERVAL_MS * 1000); |
| |
| result = a2dp_aac_encoder_cb.aac_feeding_state.counter / pcm_bytes_per_frame; |
| a2dp_aac_encoder_cb.aac_feeding_state.counter -= result * pcm_bytes_per_frame; |
| nof = result; |
| |
| LOG_VERBOSE(LOG_TAG, "%s: effective num of frames %u, iterations %u", |
| __func__, nof, noi); |
| |
| *num_of_frames = nof; |
| *num_of_iterations = noi; |
| } |
| |
| static void a2dp_aac_encode_frames(uint8_t nb_frame) { |
| tA2DP_AAC_ENCODER_PARAMS* p_encoder_params = |
| &a2dp_aac_encoder_cb.aac_encoder_params; |
| tA2DP_FEEDING_PARAMS* p_feeding_params = &a2dp_aac_encoder_cb.feeding_params; |
| uint8_t remain_nb_frame = nb_frame; |
| uint8_t read_buffer[BT_DEFAULT_BUFFER_SIZE]; |
| int pcm_bytes_per_frame = p_encoder_params->frame_length * |
| p_feeding_params->channel_count * |
| p_feeding_params->bits_per_sample / 8; |
| CHECK(pcm_bytes_per_frame <= static_cast<int>(sizeof(read_buffer))); |
| |
| // Setup the input buffer |
| AACENC_BufDesc in_buf_desc; |
| void* in_buf_vector[1] = {nullptr}; |
| int in_buf_identifiers[1] = {IN_AUDIO_DATA}; |
| int in_buf_sizes[1] = {pcm_bytes_per_frame}; |
| int in_buf_element_sizes[1] = {p_feeding_params->bits_per_sample / 8}; |
| in_buf_desc.numBufs = 1; |
| in_buf_desc.bufs = in_buf_vector; |
| in_buf_desc.bufferIdentifiers = in_buf_identifiers; |
| in_buf_desc.bufSizes = in_buf_sizes; |
| in_buf_desc.bufElSizes = in_buf_element_sizes; |
| |
| // Setup the output buffer (partially) |
| AACENC_BufDesc out_buf_desc; |
| void* out_buf_vector[1] = {nullptr}; |
| int out_buf_identifiers[1] = {OUT_BITSTREAM_DATA}; |
| int out_buf_sizes[1] = {p_encoder_params->max_encoded_buffer_bytes}; |
| // NOTE: out_buf_element_sizes below is probably unused by the encoder |
| int out_buf_element_sizes[1] = {p_feeding_params->bits_per_sample / 8}; |
| out_buf_desc.numBufs = 1; |
| out_buf_desc.bufs = out_buf_vector; |
| out_buf_desc.bufferIdentifiers = out_buf_identifiers; |
| out_buf_desc.bufSizes = out_buf_sizes; |
| out_buf_desc.bufElSizes = out_buf_element_sizes; |
| CHECK(p_encoder_params->max_encoded_buffer_bytes <= |
| static_cast<int>(BT_DEFAULT_BUFFER_SIZE - sizeof(BT_HDR))); |
| |
| AACENC_InArgs aac_in_args; |
| aac_in_args.numInSamples = |
| p_encoder_params->frame_length * p_feeding_params->channel_count; |
| aac_in_args.numAncBytes = 0; |
| |
| AACENC_OutArgs aac_out_args = { |
| .numOutBytes = 0, .numInSamples = 0, .numAncBytes = 0}; |
| |
| uint32_t count; |
| int written = 0; |
| |
| while (nb_frame) { |
| BT_HDR* p_buf = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE); |
| p_buf->offset = A2DP_AAC_OFFSET; |
| p_buf->len = 0; |
| p_buf->layer_specific = 0; |
| a2dp_aac_encoder_cb.stats.media_read_total_expected_packets++; |
| |
| count = 0; |
| do { |
| // |
| // Read the PCM data and encode it |
| // |
| if (a2dp_aac_read_feeding(read_buffer)) { |
| uint8_t* packet = (uint8_t*)(p_buf + 1) + p_buf->offset + p_buf->len; |
| if (!a2dp_aac_encoder_cb.has_aac_handle) { |
| LOG_ERROR(LOG_TAG, "%s: invalid AAC handle", __func__); |
| a2dp_aac_encoder_cb.stats.media_read_total_dropped_packets++; |
| osi_free(p_buf); |
| return; |
| } |
| in_buf_vector[0] = read_buffer; |
| out_buf_vector[0] = packet + count; |
| AACENC_ERROR aac_error = |
| aacEncEncode(a2dp_aac_encoder_cb.aac_handle, &in_buf_desc, |
| &out_buf_desc, &aac_in_args, &aac_out_args); |
| if (aac_error != AACENC_OK) { |
| LOG_ERROR(LOG_TAG, "%s: AAC encoding error: 0x%x", __func__, |
| aac_error); |
| a2dp_aac_encoder_cb.stats.media_read_total_dropped_packets++; |
| osi_free(p_buf); |
| return; |
| } |
| written = aac_out_args.numOutBytes; |
| count += written; |
| p_buf->len += written; |
| nb_frame--; |
| p_buf->layer_specific++; // added a frame to the buffer |
| } else { |
| LOG_WARN(LOG_TAG, "%s: underflow %d", __func__, nb_frame); |
| a2dp_aac_encoder_cb.aac_feeding_state.counter += |
| nb_frame * p_encoder_params->frame_length * |
| p_feeding_params->channel_count * |
| p_feeding_params->bits_per_sample / 8; |
| |
| // no more pcm to read |
| nb_frame = 0; |
| } |
| } while ((written == 0) && nb_frame); |
| |
| // NOTE: We don't check whether the packet will fit in the MTU, |
| // because AAC doesn't give us control over the encoded frame size. |
| // If the packet is larger than the MTU, it will be fragmented before |
| // transmission. |
| if (p_buf->len) { |
| /* |
| * Timestamp of the media packet header represent the TS of the |
| * first frame, i.e the timestamp before including this frame. |
| */ |
| *((uint32_t*)(p_buf + 1)) = a2dp_aac_encoder_cb.timestamp; |
| |
| a2dp_aac_encoder_cb.timestamp += |
| p_buf->layer_specific * p_encoder_params->frame_length; |
| |
| uint8_t done_nb_frame = remain_nb_frame - nb_frame; |
| remain_nb_frame = nb_frame; |
| if (!a2dp_aac_encoder_cb.enqueue_callback(p_buf, done_nb_frame)) return; |
| } else { |
| a2dp_aac_encoder_cb.stats.media_read_total_dropped_packets++; |
| osi_free(p_buf); |
| } |
| } |
| } |
| |
| static bool a2dp_aac_read_feeding(uint8_t* read_buffer) { |
| uint32_t read_size = a2dp_aac_encoder_cb.aac_encoder_params.frame_length * |
| a2dp_aac_encoder_cb.feeding_params.channel_count * |
| a2dp_aac_encoder_cb.feeding_params.bits_per_sample / 8; |
| |
| a2dp_aac_encoder_cb.stats.media_read_total_expected_reads_count++; |
| a2dp_aac_encoder_cb.stats.media_read_total_expected_read_bytes += read_size; |
| |
| /* Read Data from UIPC channel */ |
| uint32_t nb_byte_read = |
| a2dp_aac_encoder_cb.read_callback(read_buffer, read_size); |
| a2dp_aac_encoder_cb.stats.media_read_total_actual_read_bytes += nb_byte_read; |
| |
| if (nb_byte_read < read_size) { |
| if (nb_byte_read == 0) return false; |
| |
| /* Fill the unfilled part of the read buffer with silence (0) */ |
| memset(((uint8_t*)read_buffer) + nb_byte_read, 0, read_size - nb_byte_read); |
| nb_byte_read = read_size; |
| } |
| a2dp_aac_encoder_cb.stats.media_read_total_actual_reads_count++; |
| |
| return true; |
| } |
| |
| period_ms_t A2dpCodecConfigAac::encoderIntervalMs() const { |
| return a2dp_aac_get_encoder_interval_ms(); |
| } |
| |
| void A2dpCodecConfigAac::debug_codec_dump(int fd) { |
| a2dp_aac_encoder_stats_t* stats = &a2dp_aac_encoder_cb.stats; |
| |
| A2dpCodecConfig::debug_codec_dump(fd); |
| |
| dprintf(fd, |
| " Packet counts (expected/dropped) : %zu / " |
| "%zu\n", |
| stats->media_read_total_expected_packets, |
| stats->media_read_total_dropped_packets); |
| |
| dprintf(fd, |
| " PCM read counts (expected/actual) : %zu / " |
| "%zu\n", |
| stats->media_read_total_expected_reads_count, |
| stats->media_read_total_actual_reads_count); |
| |
| dprintf(fd, |
| " PCM read bytes (expected/actual) : %zu / " |
| "%zu\n", |
| stats->media_read_total_expected_read_bytes, |
| stats->media_read_total_actual_read_bytes); |
| } |
