bsncubed/aes67-ESP32-P4
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Step 7.3: decode HLS TS segments to PCM (own TS demux + AAC decoder)

Browse Source 
- main/decoder: MPEG-TS demux (packets reassembled across HTTP chunks,
  PAT -> PMT -> first ADTS-AAC PID, PES headers stripped) feeding the
  esp_audio_codec simple AAC decoder (ADTS, AAC-Plus enabled for HE-AAC
  v1/v2 variants). 7.3 only counts and logs PCM per segment.
- esp_audio_codec pinned to ~2.5.0: 2.6+ needs P4 rev >= 3 (this board
  is rev 1.3). Noted in CLAUDE.md, also for esp_audio_effects < 1.4.
- The library's combined TS decoder lost ~8% of the frames (segments
  decoded to 7.9-9.6 s, "decode error -1"); with the own demux every
  segment is sample exact: 441344 / 440320 frames = 10.008 / 9.985 s,
  matching EXTINF 10.0078 / 9.9846 (431 / 430 AAC frames), no errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Ben Nicholson
2026-09-25 14:48:12 +10:00
parent 852c0ffa0f
commit 8a6cb53e3b
7 changed files with 207 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
main/CMakeLists.txt
+1 -1
View File
@@ -1,4 +1,4 @@
idf_component_register(SRCS "main.c" "project_cfg.c" "player.c" "audio_ring.c" "hls.c"
idf_component_register(SRCS "main.c" "project_cfg.c" "player.c" "audio_ring.c" "hls.c" "decoder.c"
INCLUDE_DIRS "."
REQUIRES esp_app_format esp_hw_support heap esp_http_client mbedtls esp_timer
aes67_board aes67_health aes67_net aes67_ota aes67_ptp aes67_sdp_sap