From patchwork Sat May 2 03:22:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Almeida X-Patchwork-Id: 209984 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AADD8C47254 for ; Sat, 2 May 2020 03:22:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DD9220731 for ; Sat, 2 May 2020 03:22:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AmFwTdgv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726562AbgEBDW3 (ORCPT ); Fri, 1 May 2020 23:22:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39866 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726439AbgEBDW2 (ORCPT ); Fri, 1 May 2020 23:22:28 -0400 Received: from mail-qk1-x742.google.com (mail-qk1-x742.google.com [IPv6:2607:f8b0:4864:20::742]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8422BC061A0C; Fri, 1 May 2020 20:22:28 -0700 (PDT) Received: by mail-qk1-x742.google.com with SMTP id f83so3847555qke.13; Fri, 01 May 2020 20:22:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=qiwM8YuY++j6Qywzk7l2v88t8lfc2timetql0FUntf0=; b=AmFwTdgv/5go8FbghU+zeou6QNFBRuMQ0VWLqZLj6PtheexVMLvnAMpO6pj3VCTxmA b3H57HtlfMK6qOJvjhbZoy0XWIywF8uEdu+D4RtWNzNC/m74E23Wu/N9I/CUcc825ImT kNbS3csbDeSaTHoA6mXBVeuXTLGbVeaImzfHVA5mziTKaKWH6yHxyUJigRUHDq9/iRjx PpKFKYw2i3EFrF6nepjDnL3PDusqCLK7FoS87zVtrmQxa9LevqY6XOnXgculX0EBTYwL V3usrrd8sRJJgyisQkpPuIy5LYiqWtrVJqOFh90OZ0vDf+cusSbX7i6SqsBWUQbIR2Yw 2P1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=qiwM8YuY++j6Qywzk7l2v88t8lfc2timetql0FUntf0=; b=F243SFbS2kYvpedsh8skS5vMQlEWbOEhvEJoVJPVaaj/FxmCuUGbV4Ocu2v2znZyON SvWn5KThB8JF00revdMZd3U2eMUMlR9+63F57krQdqbc7fUkxUQ037tQHA/2PtD3LSOo JcIFI0mobkL6jSV6HHNqznmMvMLvu8fZkWwD5ZDi6xKDoTqH4EukU6pFyNn+GADQnLD8 PY6dn+p4M4FVJQKb275XuKdAJLpRqsOW1jYqkJX+C8vg05B9RMGj710PPfgKc3a6w+7T /GB7VMp3gEHpWujf+cbSKlyvKNSDxeg3iqe+f5hCg4cusSU/xvMSVBFw18O/QS98sDQT zIPA== X-Gm-Message-State: AGi0PuZopQeUWe4GybcblK+zSi+TTe3uResCa7dUvPDveFJDHoSfXzKa 80BMJPaFvTUDh+g965ogjVQ= X-Google-Smtp-Source: APiQypL6aoL3SPLd1zGUq5eZin3g5GpQefi02P+yIjq+YghEc+iEMYrLVUCPy3jBFKyatJHZtZUd0g== X-Received: by 2002:a05:620a:239:: with SMTP id u25mr5985234qkm.304.1588389747447; Fri, 01 May 2020 20:22:27 -0700 (PDT) Received: from localhost.localdomain ([2804:18:602b:723a:1b2a:57a1:a611:34ed]) by smtp.gmail.com with ESMTPSA id c41sm4410399qta.96.2020.05.01.20.22.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 May 2020 20:22:26 -0700 (PDT) From: "Daniel W. S. Almeida" X-Google-Original-From: Daniel W. S. Almeida To: mchehab+huawei@kernel.org, sean@mess.org, kstewart@linuxfoundation.org, allison@lohutok.net, tglx@linutronix.de Cc: "Daniel W. S. Almeida" , linux-media@vger.kernel.org, skhan@linuxfoundation.org, linux-kernel-mentees@lists.linuxfoundation.org, linux-kernel@vger.kernel.org Subject: [RFC, WIP, v4 00/11] media: vidtv: implement a virtual DVB driver Date: Sat, 2 May 2020 00:22:05 -0300 Message-Id: <20200502032216.197977-1-dwlsalmeida@gmail.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: "Daniel W. S. Almeida" This series is work in progress. It represents the current work done on a virtual DVB driver for the Linux media subsystem. I am new to the media subsystem and to kernel development in general. This series currently adds: -fake tuner, demodulator and bridge drivers -a PSI generator -a PES/TS packetizer -a SMPTE 302m encoder, capable of encoding AES3 audio into MPEG TS -a barebones TS mux abstraction I appreciate any feedback! Changes in v4: Added a PES packetizer Implemented a minimum version of the SMPTE 302m encoder for AES3 audio Fixed endianness in the PSI generator, converting fields to big endian where applicable Added a minimal TS mux abstraction Changes in v3: Added a bridge driver Renamed the driver to vidtv Renamed/reworked commits into smaller pieces Moved the driver into its own directory Fixed the code for the signal strength in the tuner Removed useless enums in the tuner driver (e.g. lock_status, power_status...) Reworked the logic for the poll_snr thread in the demodulator driver Moved MPEG related code to the bridge driver, as it controls the demux logic Changed literals to #defines, used sizeof in place of integer literals when computing the size of PSI structs Moved the MPEG PSI tables to the heap to reduce stack space usage Now using usleep_range in place of msleep_interruptible in the MPEG TS thread Wrapped memcpy and memset to protect against buffer overflow when writing to the MPEG TS buffer. Changes in v2: Attempted not to break assignments into multiple lines as much as possible. Code now passes checkpatch strict mode media: dvb_dummy_tuner: implement driver skeleton Changed snr values to mili db Return value from 0-100 to indicate how far off the requested frequency is from a valid one Use the frequency shift to interpolate between 34dB and 10dB if we can not match against the SNR lookup table Remove sleep calls for suspend/resume Fix memcpy call for the config struct media: dvb_dummy_fe.c: lose TS lock on bad snr Randomly recover the TS lock if the signal quality improves media: dvb_dummy_fe.c: write PSI information into DMX buffer Split the patch into multiple header/source files Hexadecimal literals are now lower case Prefer short function names / reduce function signatures Add #defines for constants when computing section lengths Change signature for functions that take a dummy channel as argument (i.e. channels* is now channels[NUM_CHANNELS]) Daniel W. S. Almeida (11): media: vidtv: add Kconfig entry media: vidtv: implement a tuner driver media: vidtv: implement a demodulator driver media: vidtv: move config structs into a separate header media: vidtv: add a bridge driver media: vidtv: add wrappers for memcpy and memset media: vidtv: add MPEG TS common code media: vidtv: implement a PSI generator media: vidtv: implement a PES packetizer media: vidtv: Implement a SMPTE 302M encoder media: vidtv: Add a MPEG Transport Stream Multiplexer drivers/media/test-drivers/Kconfig | 10 + drivers/media/test-drivers/Makefile | 1 + drivers/media/test-drivers/vidtv/Kconfig | 11 + drivers/media/test-drivers/vidtv/Makefile | 7 + .../media/test-drivers/vidtv/vidtv_bridge.c | 442 +++++++ .../media/test-drivers/vidtv/vidtv_bridge.h | 39 + .../media/test-drivers/vidtv/vidtv_channel.c | 326 +++++ .../media/test-drivers/vidtv/vidtv_channel.h | 66 + .../media/test-drivers/vidtv/vidtv_common.c | 51 + .../media/test-drivers/vidtv/vidtv_common.h | 35 + .../media/test-drivers/vidtv/vidtv_config.h | 35 + .../media/test-drivers/vidtv/vidtv_demod.c | 494 +++++++ .../media/test-drivers/vidtv/vidtv_demod.h | 34 + .../media/test-drivers/vidtv/vidtv_encoder.h | 103 ++ drivers/media/test-drivers/vidtv/vidtv_mux.c | 423 ++++++ drivers/media/test-drivers/vidtv/vidtv_mux.h | 105 ++ drivers/media/test-drivers/vidtv/vidtv_pes.c | 429 ++++++ drivers/media/test-drivers/vidtv/vidtv_pes.h | 185 +++ drivers/media/test-drivers/vidtv/vidtv_psi.c | 1155 +++++++++++++++++ drivers/media/test-drivers/vidtv/vidtv_psi.h | 362 ++++++ .../media/test-drivers/vidtv/vidtv_s302m.c | 608 +++++++++ .../media/test-drivers/vidtv/vidtv_s302m.h | 99 ++ drivers/media/test-drivers/vidtv/vidtv_ts.c | 130 ++ drivers/media/test-drivers/vidtv/vidtv_ts.h | 103 ++ .../media/test-drivers/vidtv/vidtv_tuner.c | 403 ++++++ 25 files changed, 5656 insertions(+) create mode 100644 drivers/media/test-drivers/vidtv/Kconfig create mode 100644 drivers/media/test-drivers/vidtv/Makefile create mode 100644 drivers/media/test-drivers/vidtv/vidtv_bridge.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_bridge.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_channel.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_channel.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_common.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_common.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_config.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_demod.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_demod.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_encoder.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_mux.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_mux.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_pes.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_pes.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_psi.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_psi.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_s302m.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_s302m.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_ts.c create mode 100644 drivers/media/test-drivers/vidtv/vidtv_ts.h create mode 100644 drivers/media/test-drivers/vidtv/vidtv_tuner.c