[libdvbpsi-devel] [PATCH 1/3] Introduce support for the MPEG-4 audio descriptor
Jean-Paul Saman
jpsaman at videolan.org
Fri Mar 20 14:08:09 CET 2015
Merged, thanks for contributing.
Kind regards,
Jean-Paul Saman
On Thu, Mar 19, 2015 at 9:11 PM, Daniel Kamil Kozar <dkk089 at gmail.com>
wrote:
> This patch adds support for the MPEG-4 audio descriptor. aac_profile.h is
> now
> allowed to be included multiple times, since it is also used by dr_1c.h.
> ---
> src/Makefile.am | 2 +
> src/descriptors/dr_1c.c | 75
> ++++++++++++++++++++++++++++++++++
> src/descriptors/dr_1c.h | 80
> +++++++++++++++++++++++++++++++++++++
> src/descriptors/types/aac_profile.h | 2 -
> 4 files changed, 157 insertions(+), 2 deletions(-)
> create mode 100644 src/descriptors/dr_1c.c
> create mode 100644 src/descriptors/dr_1c.h
>
> diff --git a/src/Makefile.am b/src/Makefile.am
> index 0b9a9a0..2974b3d 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -40,6 +40,7 @@ pkginclude_HEADERS = dvbpsi.h psi.h descriptor.h demux.h
> \
> descriptors/dr_13.h \
> descriptors/dr_14.h \
> descriptors/dr_1b.h \
> + descriptors/dr_1c.h \
> descriptors/dr_40.h \
> descriptors/dr_41.h \
> descriptors/dr_42.h \
> @@ -99,6 +100,7 @@ descriptors_src = descriptors/dr_02.c \
> descriptors/dr_13.c \
> descriptors/dr_14.c \
> descriptors/dr_1b.c \
> + descriptors/dr_1c.c \
> descriptors/dr_40.c \
> descriptors/dr_41.c \
> descriptors/dr_42.c \
> diff --git a/src/descriptors/dr_1c.c b/src/descriptors/dr_1c.c
> new file mode 100644
> index 0000000..5541efb
> --- /dev/null
> +++ b/src/descriptors/dr_1c.c
> @@ -0,0 +1,75 @@
> +/*
> +Copyright (C) 2015 Daniel Kamil Kozar
> +
> +This library is free software; you can redistribute it and/or
> +modify it under the terms of the GNU Lesser General Public
> +License as published by the Free Software Foundation; either
> +version 2.1 of the License, or (at your option) any later version.
> +
> +This library is distributed in the hope that it will be useful,
> +but WITHOUT ANY WARRANTY; without even the implied warranty of
> +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +Lesser General Public License for more details.
> +
> +You should have received a copy of the GNU Lesser General Public
> +License along with this library; if not, write to the Free Software
> +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> +*/
> +
> +#include "config.h"
> +
> +#include <stdlib.h>
> +#include <stdbool.h>
> +
> +#if defined(HAVE_INTTYPES_H)
> +#include <inttypes.h>
> +#elif defined(HAVE_STDINT_H)
> +#include <stdint.h>
> +#endif
> +
> +#include "../dvbpsi.h"
> +#include "../dvbpsi_private.h"
> +#include "../descriptor.h"
> +
> +#include "dr_1c.h"
> +
> +dvbpsi_mpeg4_audio_dr_t* dvbpsi_DecodeMPEG4AudioDr(
> + dvbpsi_descriptor_t * p_descriptor)
> +{
> + dvbpsi_mpeg4_audio_dr_t * p_decoded;
> +
> + /* check the tag. */
> + if (!dvbpsi_CanDecodeAsDescriptor(p_descriptor, 0x1c))
> + return NULL;
> +
> + /* don't decode twice. */
> + if (dvbpsi_IsDescriptorDecoded(p_descriptor))
> + return p_descriptor->p_decoded;
> +
> + /* all descriptors of this type have only one byte of payload. */
> + if (p_descriptor->i_length != 1)
> + return NULL;
> +
> + p_decoded = (dvbpsi_mpeg4_audio_dr_t*)malloc(sizeof(*p_decoded));
> + if (!p_decoded)
> + return NULL;
> +
> + p_decoded->i_mpeg4_audio_profile_and_level = p_descriptor->p_data[0];
> +
> + p_descriptor->p_decoded = (void*)p_decoded;
> +
> + return p_decoded;
> +}
> +
> +dvbpsi_descriptor_t * dvbpsi_GenMPEG4AudioDr(
> + dvbpsi_mpeg4_audio_dr_t * p_decoded)
> +{
> + dvbpsi_descriptor_t * p_descriptor = dvbpsi_NewDescriptor(0x1c, 1,
> NULL);
> + if (!p_descriptor)
> + return NULL;
> +
> + /* encode the data. */
> + p_descriptor->p_data[0] = p_decoded->i_mpeg4_audio_profile_and_level;
> +
> + return p_descriptor;
> +}
> diff --git a/src/descriptors/dr_1c.h b/src/descriptors/dr_1c.h
> new file mode 100644
> index 0000000..c1d4525
> --- /dev/null
> +++ b/src/descriptors/dr_1c.h
> @@ -0,0 +1,80 @@
> +/*
> +Copyright (C) 2015 Daniel Kamil Kozar
> +
> +This library is free software; you can redistribute it and/or
> +modify it under the terms of the GNU Lesser General Public
> +License as published by the Free Software Foundation; either
> +version 2.1 of the License, or (at your option) any later version.
> +
> +This library is distributed in the hope that it will be useful,
> +but WITHOUT ANY WARRANTY; without even the implied warranty of
> +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +Lesser General Public License for more details.
> +
> +You should have received a copy of the GNU Lesser General Public
> +License along with this library; if not, write to the Free Software
> +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> +*/
> +
> +/*!
> + * \file <dr_1c.h>
> + * \author Daniel Kamil Kozar <dkk089 at gmail.com>
> + * \brief Application interface for the MPEG-4 audio descriptor decoder
> and
> + * generator.
> + *
> + * Application interface for the MPEG-4 audio descriptor decoder and
> generator.
> + * This descriptor's definition can be found in ISO/IEC 13818-1 revision
> 2014/10
> + * section 2.6.38.
> + */
> +
> +#ifndef _DVBPSI_DR_1C_H_
> +#define _DVBPSI_DR_1C_H_
> +
> +#include "types/aac_profile.h"
> +
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +/*!
> + * \struct dvbpsi_mpeg4_audio_dr_s
> + * \brief MPEG-4 audio descriptor structure.
> + *
> + * This structure is used to store a decoded MPEG-4 audio descriptor.
> (ISO/IEC
> + * 13818-1 section 2.6.38).
> + */
> +
> +/*!
> + * \typedef struct dvbpsi_mpeg4_audio_dr_s dvbpsi_mpeg4_audio_dr_t
> + * \brief dvbpsi_mpeg4_audio_dr_t type definition.
> + */
> +typedef struct dvbpsi_mpeg4_audio_dr_s
> +{
> + /*! MPEG-4_audio_profile_and_level */
> + dvbpsi_aac_profile_and_level_t i_mpeg4_audio_profile_and_level;
> +} dvbpsi_mpeg4_audio_dr_t;
> +
> +/*!
> + * \brief MPEG-4 audio descriptor decoder.
> + * \param p_descriptor pointer to the descriptor structure
> + * \return A pointer to a new MPEG-4 audio descriptor structure which
> contains
> + * the decoded data.
> + */
> +dvbpsi_mpeg4_audio_dr_t* dvbpsi_DecodeMPEG4AudioDr(
> + dvbpsi_descriptor_t * p_descriptor);
> +
> +/*!
> + * \brief MPEG-4 audio descriptor generator.
> + * \param p_decoded pointer to a decoded MPEG-4 audio descriptor
> structure.
> + * \return a pointer to a new descriptor structure which contains encoded
> data.
> + */
> +dvbpsi_descriptor_t * dvbpsi_GenMPEG4AudioDr(
> + dvbpsi_mpeg4_audio_dr_t *
> p_decoded);
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#else
> +#error "Multiple inclusions of dr_1c.h"
> +#endif
> diff --git a/src/descriptors/types/aac_profile.h
> b/src/descriptors/types/aac_profile.h
> index 1a515f7..f16eedc 100644
> --- a/src/descriptors/types/aac_profile.h
> +++ b/src/descriptors/types/aac_profile.h
> @@ -127,6 +127,4 @@ typedef enum dvbpsi_aac_profile_and_level_s
> };
> #endif
>
> -#else
> -#error "Multiple inclusions of aac_profile.h"
> #endif
> --
> 2.3.3
>
> _______________________________________________
> libdvbpsi-devel mailing list
> libdvbpsi-devel at videolan.org
> https://mailman.videolan.org/listinfo/libdvbpsi-devel
>
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