Nicolas Chauvet
12 years ago
parent
8e922f24e5
commit
7547523e70
@ -1 +1 @@
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libdvbpsi-0.2.2.tar.bz2
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libdvbpsi-1.0.0_pre3.tar.bz2
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@ -0,0 +1,83 @@
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From 259e2a12fafe4c09ea3265fd686f308db4c31a60 Mon Sep 17 00:00:00 2001
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From: Jean-Paul Saman <jpsaman@videolan.org>
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Date: Tue, 16 Oct 2012 10:56:26 +0200
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Subject: [PATCH] dvbpsi_decoder_t: align DVBPSI_DECODER_COMMON
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---
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src/dvbpsi.h | 11 ++++++-----
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src/tables/nit_private.h | 4 ++--
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src/tables/pmt_private.h | 4 ++--
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3 files changed, 10 insertions(+), 9 deletions(-)
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diff --git a/src/dvbpsi.h b/src/dvbpsi.h
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index 3118da8..f373103 100644
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--- a/src/dvbpsi.h
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+++ b/src/dvbpsi.h
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@@ -197,16 +197,17 @@ typedef void (* dvbpsi_callback_gather_t)(dvbpsi_t *p_dvbpsi, /*!< pointer to d
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* decoder.
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*/
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#define DVBPSI_DECODER_COMMON \
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- dvbpsi_callback_gather_t pf_gather;/*!< PSI decoder's callback */ \
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- int i_section_max_size; /*!< Max size of a section for this decoder */ \
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- uint8_t i_continuity_counter; /*!< Continuity counter */ \
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bool b_discontinuity; /*!< Discontinuity flag */ \
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- dvbpsi_psi_section_t *p_current_section; /*!< Current section */ \
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bool b_current_valid; /*!< Current valid indicator */ \
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+ uint8_t i_continuity_counter; /*!< Continuity counter */ \
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uint8_t i_last_section_number;/*!< Last received section number */ \
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+ dvbpsi_psi_section_t *p_current_section; /*!< Current section */ \
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dvbpsi_psi_section_t *p_sections; /*!< List of received PSI sections */ \
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+ dvbpsi_callback_gather_t pf_gather;/*!< PSI decoder's callback */ \
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+ int i_section_max_size; /*!< Max size of a section for this decoder */ \
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int i_need; /*!< Bytes needed */ \
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- bool b_complete_header; /*!< Flag for header completion */
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+ bool b_complete_header; /*!< Flag for header completion */ \
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+ uint8_t i_reserved[3]; /*!< Reserved */
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struct dvbpsi_decoder_s
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{
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diff --git a/src/tables/nit_private.h b/src/tables/nit_private.h
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index 8eadce7..6c80e35 100644
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--- a/src/tables/nit_private.h
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+++ b/src/tables/nit_private.h
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@@ -39,14 +39,14 @@ typedef struct dvbpsi_nit_decoder_s
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{
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DVBPSI_DECODER_COMMON
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- uint16_t i_network_id;
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-
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dvbpsi_nit_callback pf_nit_callback;
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void * p_cb_data;
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dvbpsi_nit_t current_nit;
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dvbpsi_nit_t * p_building_nit;
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+ uint16_t i_network_id;
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+
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} dvbpsi_nit_decoder_t;
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/*****************************************************************************
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diff --git a/src/tables/pmt_private.h b/src/tables/pmt_private.h
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index ed75a8b..4f10ecc 100644
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--- a/src/tables/pmt_private.h
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+++ b/src/tables/pmt_private.h
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@@ -37,14 +37,14 @@ typedef struct dvbpsi_pmt_decoder_s
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{
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DVBPSI_DECODER_COMMON
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- uint16_t i_program_number;
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-
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dvbpsi_pmt_callback pf_pmt_callback;
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void * p_cb_data;
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dvbpsi_pmt_t current_pmt;
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dvbpsi_pmt_t * p_building_pmt;
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+ uint16_t i_program_number;
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+
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} dvbpsi_pmt_decoder_t;
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/*****************************************************************************
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--
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1.7.11.7
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@ -0,0 +1,209 @@
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From 9d20b904c0649cae0c71cef5177113821dfcc71f Mon Sep 17 00:00:00 2001
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From: Jean-Paul Saman <jpsaman@videolan.org>
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Date: Tue, 16 Oct 2012 10:56:26 +0200
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Subject: [PATCH] dvbpsi_decoder_t: solve alignment issues with
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dvbpsi_decoder_t casting.
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Repack DVBPSI_DECODER_COMMON to be byte aligned and add some checks to
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do clever casting.
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---
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src/dvbpsi.c | 3 +-
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src/dvbpsi.h | 82 +++++++++++++++++++++++++++++++++++-------------
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src/tables/nit_private.h | 4 +--
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src/tables/pmt_private.h | 4 +--
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4 files changed, 66 insertions(+), 27 deletions(-)
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diff --git a/src/dvbpsi.c b/src/dvbpsi.c
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index ffbfaca..d45802e 100644
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--- a/src/dvbpsi.c
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+++ b/src/dvbpsi.c
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@@ -170,7 +170,7 @@ void dvbpsi_delete(dvbpsi_t *p_dvbpsi)
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* dvbpsi_decoder_new
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*****************************************************************************/
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#define DVBPSI_INVALID_CC (0xFF)
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-dvbpsi_decoder_t *dvbpsi_decoder_new(dvbpsi_callback_gather_t pf_gather,
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+void *dvbpsi_decoder_new(dvbpsi_callback_gather_t pf_gather,
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const int i_section_max_size, const bool b_discontinuity, const size_t psi_size)
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{
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assert(psi_size >= sizeof(dvbpsi_decoder_t));
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@@ -179,6 +179,7 @@ dvbpsi_decoder_t *dvbpsi_decoder_new(dvbpsi_callback_gather_t pf_gather,
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if (p_decoder == NULL)
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return NULL;
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+ memcpy(&p_decoder->i_magic[0], "psi", 3);
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p_decoder->pf_gather = pf_gather;
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p_decoder->p_current_section = NULL;
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p_decoder->i_section_max_size = i_section_max_size;
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diff --git a/src/dvbpsi.h b/src/dvbpsi.h
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index 3118da8..8a019e3 100644
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--- a/src/dvbpsi.h
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+++ b/src/dvbpsi.h
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@@ -43,6 +43,16 @@ extern "C" {
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#endif
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/*****************************************************************************
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+ * Helper for GCC version checks borrowed from VLC.
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+ *****************************************************************************/
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+#ifdef __GNUC__
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+# define DVBPSI_GCC_VERSION(maj,min) \
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+ ((__GNUC__ > (maj)) || (__GNUC__ == (maj) && __GNUC_MINOR__ >= (min)))
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+#else
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+# define DVBPSI_GCC_VERSION(maj,min) (0)
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+#endif
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+
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+/*****************************************************************************
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* dvbpsi_t
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*****************************************************************************/
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/*!
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@@ -90,7 +100,22 @@ typedef struct dvbpsi_decoder_s dvbpsi_decoder_t;
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* \def DVBPSI_DECODER(x)
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* \brief Helper macro for casting a private decoder into a dvbpsi_decoder_t
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*/
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-#define DVBPSI_DECODER(x) ((dvbpsi_decoder_t *)(x))
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+/* Clever cast borrowed from VLC */
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+#if DVBPSI_GCC_VERSION(4,0)
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+# ifndef __cplusplus
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+# define DVBPSI_DECODER( x ) \
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+ __builtin_choose_expr( \
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+ __builtin_offsetof(__typeof__(*(x)), i_magic), \
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+ (void)0, \
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+ (dvbpsi_decoder_t *)(x))
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+# else
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+# define DVBPSI_DECODER( x ) \
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+ ((dvbpsi_decoder_t *)(x) \
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+ + 0 * __builtin_offsetof(__typeof__(*(x)), i_magic))
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+# endif
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+#else
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+# define DVBPSI_DECODER(x) ((dvbpsi_decoder_t *)(x))
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+#endif
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/*****************************************************************************
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* dvbpsi_t
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@@ -187,6 +212,28 @@ typedef void (* dvbpsi_callback_gather_t)(dvbpsi_t *p_dvbpsi, /*!< pointer to d
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dvbpsi_psi_section_t* p_section); /*!< pointer to psi section */
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/*****************************************************************************
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+ * DVBPSI_DECODER_COMMON
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+ *****************************************************************************/
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+#define DVBPSI_DECODER_COMMON \
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+/*! \
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+ * \name DVBPSI_DECODER_COMMON \
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+ * these members are common for all dvbpsi_decoder_t \
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+ */ \
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+/**@{*/ \
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+ uint8_t i_magic[3]; /*!< Reserved magic value */ \
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+ bool b_complete_header; /*!< Flag for header completion */ \
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+ bool b_discontinuity; /*!< Discontinuity flag */ \
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+ bool b_current_valid; /*!< Current valid indicator */ \
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+ uint8_t i_continuity_counter; /*!< Continuity counter */ \
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+ uint8_t i_last_section_number;/*!< Last received section number */ \
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+ dvbpsi_psi_section_t *p_current_section; /*!< Current section */ \
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+ dvbpsi_psi_section_t *p_sections; /*!< List of received PSI sections */ \
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+ dvbpsi_callback_gather_t pf_gather;/*!< PSI decoder's callback */ \
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+ int i_section_max_size; /*!< Max size of a section for this decoder */ \
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+ int i_need; /*!< Bytes needed */ \
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+/**@}*/
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+
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+/*****************************************************************************
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* struct dvbpsi_decoder_s
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*****************************************************************************/
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/*!
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@@ -196,18 +243,6 @@ typedef void (* dvbpsi_callback_gather_t)(dvbpsi_t *p_dvbpsi, /*!< pointer to d
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* This structure shouldn't be used but if you want to write an external
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* decoder.
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*/
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-#define DVBPSI_DECODER_COMMON \
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- dvbpsi_callback_gather_t pf_gather;/*!< PSI decoder's callback */ \
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- int i_section_max_size; /*!< Max size of a section for this decoder */ \
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- uint8_t i_continuity_counter; /*!< Continuity counter */ \
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- bool b_discontinuity; /*!< Discontinuity flag */ \
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- dvbpsi_psi_section_t *p_current_section; /*!< Current section */ \
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- bool b_current_valid; /*!< Current valid indicator */ \
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- uint8_t i_last_section_number;/*!< Last received section number */ \
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- dvbpsi_psi_section_t *p_sections; /*!< List of received PSI sections */ \
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- int i_need; /*!< Bytes needed */ \
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- bool b_complete_header; /*!< Flag for header completion */
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-
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struct dvbpsi_decoder_s
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{
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DVBPSI_DECODER_COMMON
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@@ -217,22 +252,25 @@ struct dvbpsi_decoder_s
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* dvbpsi_decoder_new
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*****************************************************************************/
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/*!
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- * \fn dvbpsi_decoder_t *dvbpsi_decoder_new(dvbpsi_callback_gather_t pf_gather,
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+ * \fn void *dvbpsi_decoder_new(dvbpsi_callback_gather_t pf_gather,
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* const int i_section_max_size, const bool b_discontinuity, const size_t psi_size);
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- * \brief Create a new dvbpsi_decoder_t.
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+ * \brief Create a new (private) dvbpsi decoder.
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* \param pf_gather pointer to gather function for PSI decoder.
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* \param i_section_max_size Max size of a section for this decoder
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* \param b_discontinuity Discontinuity flag
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* \param psi_size size of new PSI struct, eg: sizeof(dvbpsi_pat_t)
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- * \return pointer to dvbpsi_decoder_t
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+ * \return pointer to memory of size 'psi_size' that can be casted into a dvbpsi_decoder_t.
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*
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- * Creates a dvbpsi_decoder_t pointer to struct dvbpsi_decoder_s. It should be
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- * delete with @see dvbpsi_decoder_delete() function.
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+ * Creates a void pointer that points to a private dvbpsi decoder struct (eg: dvbpsi_pat_t).
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+ * The first elements in this newly created decoder should contain DVBPSI_DECODER_COMMON, which
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+ * corresponds to a dvbpsi_decoder_t.
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+ * Upon return the pointer should be casted to the correct type. Delete the pointer
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+ * with @see dvbpsi_decoder_delete() function.
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*/
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-dvbpsi_decoder_t *dvbpsi_decoder_new(dvbpsi_callback_gather_t pf_gather,
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- const int i_section_max_size,
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- const bool b_discontinuity,
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- const size_t psi_size);
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+void *dvbpsi_decoder_new(dvbpsi_callback_gather_t pf_gather,
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+ const int i_section_max_size,
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+ const bool b_discontinuity,
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+ const size_t psi_size);
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/*****************************************************************************
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* dvbpsi_decoder_delete
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diff --git a/src/tables/nit_private.h b/src/tables/nit_private.h
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index 8eadce7..6c80e35 100644
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--- a/src/tables/nit_private.h
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+++ b/src/tables/nit_private.h
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@@ -39,14 +39,14 @@ typedef struct dvbpsi_nit_decoder_s
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{
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DVBPSI_DECODER_COMMON
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- uint16_t i_network_id;
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-
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dvbpsi_nit_callback pf_nit_callback;
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void * p_cb_data;
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dvbpsi_nit_t current_nit;
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dvbpsi_nit_t * p_building_nit;
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+ uint16_t i_network_id;
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+
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} dvbpsi_nit_decoder_t;
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/*****************************************************************************
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diff --git a/src/tables/pmt_private.h b/src/tables/pmt_private.h
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index ed75a8b..4f10ecc 100644
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--- a/src/tables/pmt_private.h
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+++ b/src/tables/pmt_private.h
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@@ -37,14 +37,14 @@ typedef struct dvbpsi_pmt_decoder_s
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{
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DVBPSI_DECODER_COMMON
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- uint16_t i_program_number;
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-
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dvbpsi_pmt_callback pf_pmt_callback;
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void * p_cb_data;
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dvbpsi_pmt_t current_pmt;
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dvbpsi_pmt_t * p_building_pmt;
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+ uint16_t i_program_number;
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+
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} dvbpsi_pmt_decoder_t;
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/*****************************************************************************
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--
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1.7.11.7
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