mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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472 lines
20 KiB
C
472 lines
20 KiB
C
/* GStreamer
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* Copyright (C) <2012> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include "audio-format.h"
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#include "gstaudiopack.h"
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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# define audio_orc_unpack_s16le audio_orc_unpack_s16
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# define audio_orc_unpack_s16be audio_orc_unpack_s16_swap
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# define audio_orc_unpack_u16le audio_orc_unpack_u16
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# define audio_orc_unpack_u16be audio_orc_unpack_u16_swap
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# define audio_orc_unpack_s24_32le audio_orc_unpack_s24_32
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# define audio_orc_unpack_s24_32be audio_orc_unpack_s24_32_swap
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# define audio_orc_unpack_u24_32le audio_orc_unpack_u24_32
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# define audio_orc_unpack_u24_32be audio_orc_unpack_u24_32_swap
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# define audio_orc_unpack_s32le audio_orc_unpack_s32
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# define audio_orc_unpack_s32be audio_orc_unpack_s32_swap
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# define audio_orc_unpack_u32le audio_orc_unpack_u32
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# define audio_orc_unpack_u32be audio_orc_unpack_u32_swap
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# define audio_orc_unpack_f32le audio_orc_unpack_f32
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# define audio_orc_unpack_f32be audio_orc_unpack_f32_swap
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# define audio_orc_unpack_f64le audio_orc_unpack_f64
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# define audio_orc_unpack_f64be audio_orc_unpack_f64_swap
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# define audio_orc_pack_s16le audio_orc_pack_s16
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# define audio_orc_pack_s16be audio_orc_pack_s16_swap
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# define audio_orc_pack_u16le audio_orc_pack_u16
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# define audio_orc_pack_u16be audio_orc_pack_u16_swap
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# define audio_orc_pack_s24_32le audio_orc_pack_s24_32
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# define audio_orc_pack_s24_32be audio_orc_pack_s24_32_swap
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# define audio_orc_pack_u24_32le audio_orc_pack_u24_32
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# define audio_orc_pack_u24_32be audio_orc_pack_u24_32_swap
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# define audio_orc_pack_s32le audio_orc_pack_s32
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# define audio_orc_pack_s32be audio_orc_pack_s32_swap
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# define audio_orc_pack_u32le audio_orc_pack_u32
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# define audio_orc_pack_u32be audio_orc_pack_u32_swap
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# define audio_orc_pack_f32le audio_orc_pack_f32
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# define audio_orc_pack_f32be audio_orc_pack_f32_swap
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# define audio_orc_pack_f64le audio_orc_pack_f64
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# define audio_orc_pack_f64be audio_orc_pack_f64_swap
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#else
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# define audio_orc_unpack_s16le audio_orc_unpack_s16_swap
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# define audio_orc_unpack_s16be audio_orc_unpack_s16
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# define audio_orc_unpack_u16le audio_orc_unpack_u16_swap
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# define audio_orc_unpack_u16be audio_orc_unpack_u16
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# define audio_orc_unpack_s24_32le audio_orc_unpack_s24_32_swap
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# define audio_orc_unpack_s24_32be audio_orc_unpack_s24_32
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# define audio_orc_unpack_u24_32le audio_orc_unpack_u24_32_swap
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# define audio_orc_unpack_u24_32be audio_orc_unpack_u24_32
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# define audio_orc_unpack_s32le audio_orc_unpack_s32_swap
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# define audio_orc_unpack_s32be audio_orc_unpack_s32
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# define audio_orc_unpack_u32le audio_orc_unpack_u32_swap
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# define audio_orc_unpack_u32be audio_orc_unpack_u32
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# define audio_orc_unpack_f32le audio_orc_unpack_f32_swap
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# define audio_orc_unpack_f32be audio_orc_unpack_f32
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# define audio_orc_unpack_f64le audio_orc_unpack_f64_swap
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# define audio_orc_unpack_f64be audio_orc_unpack_f64
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# define audio_orc_pack_s16le audio_orc_pack_s16_swap
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# define audio_orc_pack_s16be audio_orc_pack_s16
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# define audio_orc_pack_u16le audio_orc_pack_u16_swap
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# define audio_orc_pack_u16be audio_orc_pack_u16
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# define audio_orc_pack_s24_32le audio_orc_pack_s24_32_swap
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# define audio_orc_pack_s24_32be audio_orc_pack_s24_32
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# define audio_orc_pack_u24_32le audio_orc_pack_u24_32_swap
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# define audio_orc_pack_u24_32be audio_orc_pack_u24_32
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# define audio_orc_pack_s32le audio_orc_pack_s32_swap
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# define audio_orc_pack_s32be audio_orc_pack_s32
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# define audio_orc_pack_u32le audio_orc_pack_u32_swap
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# define audio_orc_pack_u32be audio_orc_pack_u32
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# define audio_orc_pack_f32le audio_orc_pack_f32_swap
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# define audio_orc_pack_f32be audio_orc_pack_f32
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# define audio_orc_pack_f64le audio_orc_pack_f64_swap
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# define audio_orc_pack_f64be audio_orc_pack_f64
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#endif
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#define MAKE_ORC_PACK_UNPACK(fmt) \
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static void unpack_ ##fmt (const GstAudioFormatInfo *info, \
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GstAudioPackFlags flags, gpointer dest, \
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const gpointer data, gint length) { \
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audio_orc_unpack_ ##fmt (dest, data, length); \
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} \
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static void pack_ ##fmt (const GstAudioFormatInfo *info, \
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GstAudioPackFlags flags, const gpointer src, \
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gpointer data, gint length) { \
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audio_orc_pack_ ##fmt (data, src, length); \
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}
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#define PACK_S8 GST_AUDIO_FORMAT_S32, unpack_s8, pack_s8
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MAKE_ORC_PACK_UNPACK (s8)
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#define PACK_U8 GST_AUDIO_FORMAT_S32, unpack_u8, pack_u8
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MAKE_ORC_PACK_UNPACK (u8)
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#define PACK_S16LE GST_AUDIO_FORMAT_S32, unpack_s16le, pack_s16le
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MAKE_ORC_PACK_UNPACK (s16le)
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#define PACK_S16BE GST_AUDIO_FORMAT_S32, unpack_s16be, pack_s16be
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MAKE_ORC_PACK_UNPACK (s16be)
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#define PACK_U16LE GST_AUDIO_FORMAT_S32, unpack_u16le, pack_u16le
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MAKE_ORC_PACK_UNPACK (u16le)
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#define PACK_U16BE GST_AUDIO_FORMAT_S32, unpack_u16be, pack_u16be
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MAKE_ORC_PACK_UNPACK (u16be)
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#define PACK_S24_32LE GST_AUDIO_FORMAT_S32, unpack_s24_32le, pack_s24_32le
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MAKE_ORC_PACK_UNPACK (s24_32le)
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#define PACK_S24_32BE GST_AUDIO_FORMAT_S32, unpack_s24_32be, pack_s24_32be
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MAKE_ORC_PACK_UNPACK (s24_32be)
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#define PACK_U24_32LE GST_AUDIO_FORMAT_S32, unpack_u24_32le, pack_u24_32le
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MAKE_ORC_PACK_UNPACK (u24_32le)
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#define PACK_U24_32BE GST_AUDIO_FORMAT_S32, unpack_u24_32be, pack_u24_32be
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MAKE_ORC_PACK_UNPACK (u24_32be)
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#define PACK_S32LE GST_AUDIO_FORMAT_S32, unpack_s32le, pack_s32le
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MAKE_ORC_PACK_UNPACK (s32le)
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#define PACK_S32BE GST_AUDIO_FORMAT_S32, unpack_s32be, pack_s32be
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MAKE_ORC_PACK_UNPACK (s32be)
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#define PACK_U32LE GST_AUDIO_FORMAT_S32, unpack_u32le, pack_u32le
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MAKE_ORC_PACK_UNPACK (u32le)
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#define PACK_U32BE GST_AUDIO_FORMAT_S32, unpack_u32be, pack_u32be
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MAKE_ORC_PACK_UNPACK (u32be)
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#define SIGNED (1U<<31)
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/* pack from signed integer 32 to integer */
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#define WRITE24_TO_LE(p,v) p[0] = v & 0xff; p[1] = (v >> 8) & 0xff; p[2] = (v >> 16) & 0xff
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#define WRITE24_TO_BE(p,v) p[2] = v & 0xff; p[1] = (v >> 8) & 0xff; p[0] = (v >> 16) & 0xff
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#define READ24_FROM_LE(p) (p[0] | (p[1] << 8) | (p[2] << 16))
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#define READ24_FROM_BE(p) (p[2] | (p[1] << 8) | (p[0] << 16))
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#define MAKE_PACK_UNPACK(name, stride, sign, scale, READ_FUNC, WRITE_FUNC) \
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static void unpack_ ##name (const GstAudioFormatInfo *info, \
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GstAudioPackFlags flags, gpointer dest, \
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const gpointer data, gint length) \
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{ \
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guint32 *d = dest; \
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guint8 *s = data; \
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for (;length; length--) { \
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*d++ = (((gint32) READ_FUNC (s)) << scale) ^ (sign); \
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s += stride; \
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} \
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} \
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static void pack_ ##name (const GstAudioFormatInfo *info, \
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GstAudioPackFlags flags, const gpointer src, \
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gpointer data, gint length) \
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{ \
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gint32 tmp; \
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guint32 *s = src; \
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guint8 *d = data; \
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for (;length; length--) { \
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tmp = (*s++ ^ (sign)) >> scale; \
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WRITE_FUNC (d, tmp); \
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d += stride; \
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} \
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}
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#define PACK_S24LE GST_AUDIO_FORMAT_S32, unpack_s24le, pack_s24le
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MAKE_PACK_UNPACK (s24le, 3, 0, 8, READ24_FROM_LE, WRITE24_TO_LE)
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#define PACK_U24LE GST_AUDIO_FORMAT_S32, unpack_u24le, pack_u24le
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MAKE_PACK_UNPACK (u24le, 3, SIGNED, 8, READ24_FROM_LE, WRITE24_TO_LE)
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#define PACK_S24BE GST_AUDIO_FORMAT_S32, unpack_s24be, pack_s24be
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MAKE_PACK_UNPACK (s24be, 3, 0, 8, READ24_FROM_BE, WRITE24_TO_BE)
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#define PACK_U24BE GST_AUDIO_FORMAT_S32, unpack_u24be, pack_u24be
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MAKE_PACK_UNPACK (u24be, 3, SIGNED, 8, READ24_FROM_BE, WRITE24_TO_BE)
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#define PACK_S20LE GST_AUDIO_FORMAT_S32, unpack_s20le, pack_s20le
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MAKE_PACK_UNPACK (s20le, 3, 0, 12, READ24_FROM_LE, WRITE24_TO_LE)
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#define PACK_U20LE GST_AUDIO_FORMAT_S32, unpack_u20le, pack_u20le
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MAKE_PACK_UNPACK (u20le, 3, SIGNED, 12, READ24_FROM_LE, WRITE24_TO_LE)
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#define PACK_S20BE GST_AUDIO_FORMAT_S32, unpack_s20be, pack_s20be
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MAKE_PACK_UNPACK (s20be, 3, 0, 12, READ24_FROM_BE, WRITE24_TO_BE)
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#define PACK_U20BE GST_AUDIO_FORMAT_S32, unpack_u20be, pack_u20be
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MAKE_PACK_UNPACK (u20be, 3, SIGNED, 12, READ24_FROM_BE, WRITE24_TO_BE)
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#define PACK_S18LE GST_AUDIO_FORMAT_S32, unpack_s18le, pack_s18le
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MAKE_PACK_UNPACK (s18le, 3, 0, 12, READ24_FROM_LE, WRITE24_TO_LE)
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#define PACK_U18LE GST_AUDIO_FORMAT_S32, unpack_u18le, pack_u18le
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MAKE_PACK_UNPACK (u18le, 3, SIGNED, 12, READ24_FROM_LE, WRITE24_TO_LE)
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#define PACK_S18BE GST_AUDIO_FORMAT_S32, unpack_s18be, pack_s18be
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MAKE_PACK_UNPACK (s18be, 3, 0, 12, READ24_FROM_BE, WRITE24_TO_BE)
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#define PACK_U18BE GST_AUDIO_FORMAT_S32, unpack_u18be, pack_u18be
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MAKE_PACK_UNPACK (u18be, 3, SIGNED, 12, READ24_FROM_BE, WRITE24_TO_BE)
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#define PACK_F32LE GST_AUDIO_FORMAT_F64, unpack_f32le, pack_f32le
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MAKE_ORC_PACK_UNPACK (f32le)
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#define PACK_F32BE GST_AUDIO_FORMAT_F64, unpack_f32be, pack_f32be
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MAKE_ORC_PACK_UNPACK (f32be)
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#define PACK_F64LE GST_AUDIO_FORMAT_F64, unpack_f64le, pack_f64le
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MAKE_ORC_PACK_UNPACK (f64le)
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#define PACK_F64BE GST_AUDIO_FORMAT_F64, unpack_f64be, pack_f64be
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MAKE_ORC_PACK_UNPACK (f64be)
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#define SINT (GST_AUDIO_FORMAT_FLAG_INTEGER | GST_AUDIO_FORMAT_FLAG_SIGNED)
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#define SINT_PACK (SINT | GST_AUDIO_FORMAT_FLAG_UNPACK)
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#define UINT (GST_AUDIO_FORMAT_FLAG_INTEGER)
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#define FLOAT (GST_AUDIO_FORMAT_FLAG_FLOAT)
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#define FLOAT_PACK (FLOAT | GST_AUDIO_FORMAT_FLAG_UNPACK)
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#define MAKE_FORMAT(str,desc,flags,end,width,depth,silent, pack) \
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{ GST_AUDIO_FORMAT_ ##str, G_STRINGIFY(str), desc, flags, end, width, depth, silent, pack }
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#define SILENT_0 { 0, 0, 0, 0, 0, 0, 0, 0 }
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#define SILENT_U8 { 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 }
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#define SILENT_U16LE { 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80 }
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#define SILENT_U16BE { 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00 }
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#define SILENT_U24_32LE { 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x80, 0x00 }
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#define SILENT_U24_32BE { 0x00, 0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00 }
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#define SILENT_U32LE { 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x80 }
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#define SILENT_U32BE { 0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 }
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#define SILENT_U24LE { 0x00, 0x00, 0x80, 0x00, 0x00, 0x80 }
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#define SILENT_U24BE { 0x80, 0x00, 0x00, 0x80, 0x00, 0x00 }
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#define SILENT_U20LE { 0x00, 0x00, 0x08, 0x00, 0x00, 0x08 }
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#define SILENT_U20BE { 0x08, 0x00, 0x00, 0x08, 0x00, 0x00 }
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#define SILENT_U18LE { 0x00, 0x00, 0x02, 0x00, 0x00, 0x02 }
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#define SILENT_U18BE { 0x02, 0x00, 0x00, 0x02, 0x00, 0x00 }
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static GstAudioFormatInfo formats[] = {
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{GST_AUDIO_FORMAT_UNKNOWN, "UNKNOWN", "Unknown audio", 0, 0, 0, 0},
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{GST_AUDIO_FORMAT_ENCODED, "ENCODED", "Encoded audio",
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GST_AUDIO_FORMAT_FLAG_COMPLEX, 0, 0, 0},
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/* 8 bit */
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MAKE_FORMAT (S8, "8-bit signed PCM audio", SINT, 0, 8, 8, SILENT_0,
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PACK_S8),
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MAKE_FORMAT (U8, "8-bit unsigned PCM audio", UINT, 0, 8, 8, SILENT_U8,
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PACK_U8),
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/* 16 bit */
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MAKE_FORMAT (S16LE, "16-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 16,
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16,
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SILENT_0, PACK_S16LE),
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MAKE_FORMAT (S16BE, "16-bit signed PCM audio", SINT, G_BIG_ENDIAN, 16,
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16,
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SILENT_0, PACK_S16BE),
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MAKE_FORMAT (U16LE, "16-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN,
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16,
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16, SILENT_U16LE, PACK_U16LE),
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MAKE_FORMAT (U16BE, "16-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 16,
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16,
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SILENT_U16BE, PACK_U16BE),
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/* 24 bit in low 3 bytes of 32 bits */
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MAKE_FORMAT (S24_32LE, "24-bit signed PCM audio", SINT, G_LITTLE_ENDIAN,
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32,
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24, SILENT_0, PACK_S24_32LE),
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MAKE_FORMAT (S24_32BE, "24-bit signed PCM audio", SINT, G_BIG_ENDIAN, 32,
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24,
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SILENT_0, PACK_S24_32BE),
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MAKE_FORMAT (U24_32LE, "24-bit unsigned PCM audio", UINT,
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G_LITTLE_ENDIAN, 32,
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24, SILENT_U24_32LE, PACK_U24_32LE),
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MAKE_FORMAT (U24_32BE, "24-bit unsigned PCM audio", UINT, G_BIG_ENDIAN,
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32,
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24, SILENT_U24_32BE, PACK_U24_32BE),
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/* 32 bit */
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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MAKE_FORMAT (S32LE, "32-bit signed PCM audio", SINT_PACK,
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G_LITTLE_ENDIAN, 32,
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32, SILENT_0, PACK_S32LE),
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MAKE_FORMAT (S32BE, "32-bit signed PCM audio", SINT, G_BIG_ENDIAN, 32,
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32,
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SILENT_0, PACK_S32BE),
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#else
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MAKE_FORMAT (S32LE, "32-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 32,
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32,
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SILENT_0, PACK_S32LE),
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MAKE_FORMAT (S32BE, "32-bit signed PCM audio", SINT_PACK, G_BIG_ENDIAN,
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32,
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32,
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SILENT_0, PACK_S32BE),
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#endif
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MAKE_FORMAT (U32LE, "32-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN,
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32,
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32, SILENT_U32LE, PACK_U32LE),
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MAKE_FORMAT (U32BE, "32-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 32,
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32,
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SILENT_U32BE, PACK_U32BE),
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/* 24 bit in 3 bytes */
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MAKE_FORMAT (S24LE, "24-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 24,
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24,
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SILENT_0, PACK_S24LE),
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MAKE_FORMAT (S24BE, "24-bit signed PCM audio", SINT, G_BIG_ENDIAN, 24,
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24,
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SILENT_0, PACK_S24BE),
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MAKE_FORMAT (U24LE, "24-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN,
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24,
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24, SILENT_U24LE, PACK_U24LE),
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MAKE_FORMAT (U24BE, "24-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 24,
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24,
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SILENT_U24BE, PACK_U24BE),
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/* 20 bit in 3 bytes */
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MAKE_FORMAT (S20LE, "20-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 24,
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20,
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SILENT_0, PACK_S20LE),
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MAKE_FORMAT (S20BE, "20-bit signed PCM audio", SINT, G_BIG_ENDIAN, 24,
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20,
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SILENT_0, PACK_S20BE),
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MAKE_FORMAT (U20LE, "20-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN,
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24,
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20, SILENT_U20LE, PACK_U20LE),
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MAKE_FORMAT (U20BE, "20-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 24,
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20,
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SILENT_U20BE, PACK_U20BE),
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/* 18 bit in 3 bytes */
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MAKE_FORMAT (S18LE, "18-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 24,
|
|
18,
|
|
SILENT_0, PACK_S18LE),
|
|
MAKE_FORMAT (S18BE, "18-bit signed PCM audio", SINT, G_BIG_ENDIAN, 24,
|
|
18,
|
|
SILENT_0, PACK_S18BE),
|
|
MAKE_FORMAT (U18LE, "18-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN,
|
|
24,
|
|
18, SILENT_U18LE, PACK_U18LE),
|
|
MAKE_FORMAT (U18BE, "18-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 24,
|
|
18,
|
|
SILENT_U18BE, PACK_U18BE),
|
|
/* float */
|
|
MAKE_FORMAT (F32LE, "32-bit floating-point audio",
|
|
GST_AUDIO_FORMAT_FLAG_FLOAT, G_LITTLE_ENDIAN, 32, 32, SILENT_0,
|
|
PACK_F32LE),
|
|
MAKE_FORMAT (F32BE, "32-bit floating-point audio",
|
|
GST_AUDIO_FORMAT_FLAG_FLOAT, G_BIG_ENDIAN, 32, 32, SILENT_0,
|
|
PACK_F32BE),
|
|
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
|
|
MAKE_FORMAT (F64LE, "64-bit floating-point audio",
|
|
FLOAT_PACK, G_LITTLE_ENDIAN, 64, 64, SILENT_0, PACK_F64LE),
|
|
MAKE_FORMAT (F64BE, "64-bit floating-point audio",
|
|
FLOAT, G_BIG_ENDIAN, 64, 64, SILENT_0, PACK_F64BE)
|
|
#else
|
|
MAKE_FORMAT (F64LE, "64-bit floating-point audio",
|
|
FLOAT, G_LITTLE_ENDIAN, 64, 64, SILENT_0, PACK_F64LE),
|
|
MAKE_FORMAT (F64BE, "64-bit floating-point audio",
|
|
FLOAT_PACK, G_BIG_ENDIAN, 64, 64, SILENT_0, PACK_F64BE)
|
|
#endif
|
|
};
|
|
|
|
G_DEFINE_POINTER_TYPE (GstAudioFormatInfo, gst_audio_format_info);
|
|
|
|
/**
|
|
* gst_audio_format_build_integer:
|
|
* @sign: signed or unsigned format
|
|
* @endianness: G_LITTLE_ENDIAN or G_BIG_ENDIAN
|
|
* @width: amount of bits used per sample
|
|
* @depth: amount of used bits in @width
|
|
*
|
|
* Construct a #GstAudioFormat with given parameters.
|
|
*
|
|
* Returns: a #GstAudioFormat or GST_AUDIO_FORMAT_UNKNOWN when no audio format
|
|
* exists with the given parameters.
|
|
*/
|
|
GstAudioFormat
|
|
gst_audio_format_build_integer (gboolean sign, gint endianness,
|
|
gint width, gint depth)
|
|
{
|
|
gint i, e;
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (formats); i++) {
|
|
GstAudioFormatInfo *finfo = &formats[i];
|
|
|
|
/* must be int */
|
|
if (!GST_AUDIO_FORMAT_INFO_IS_INTEGER (finfo))
|
|
continue;
|
|
|
|
/* width and depth must match */
|
|
if (width != GST_AUDIO_FORMAT_INFO_WIDTH (finfo))
|
|
continue;
|
|
if (depth != GST_AUDIO_FORMAT_INFO_DEPTH (finfo))
|
|
continue;
|
|
|
|
/* if there is endianness, it must match */
|
|
e = GST_AUDIO_FORMAT_INFO_ENDIANNESS (finfo);
|
|
if (e && e != endianness)
|
|
continue;
|
|
|
|
/* check sign */
|
|
if ((sign && !GST_AUDIO_FORMAT_INFO_IS_SIGNED (finfo)) ||
|
|
(!sign && GST_AUDIO_FORMAT_INFO_IS_SIGNED (finfo)))
|
|
continue;
|
|
|
|
return GST_AUDIO_FORMAT_INFO_FORMAT (finfo);
|
|
}
|
|
return GST_AUDIO_FORMAT_UNKNOWN;
|
|
}
|
|
|
|
/**
|
|
* gst_audio_format_from_string:
|
|
* @format: a format string
|
|
*
|
|
* Convert the @format string to its #GstAudioFormat.
|
|
*
|
|
* Returns: the #GstAudioFormat for @format or GST_AUDIO_FORMAT_UNKNOWN when the
|
|
* string is not a known format.
|
|
*/
|
|
GstAudioFormat
|
|
gst_audio_format_from_string (const gchar * format)
|
|
{
|
|
guint i;
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (formats); i++) {
|
|
if (strcmp (GST_AUDIO_FORMAT_INFO_NAME (&formats[i]), format) == 0)
|
|
return GST_AUDIO_FORMAT_INFO_FORMAT (&formats[i]);
|
|
}
|
|
return GST_AUDIO_FORMAT_UNKNOWN;
|
|
}
|
|
|
|
const gchar *
|
|
gst_audio_format_to_string (GstAudioFormat format)
|
|
{
|
|
g_return_val_if_fail (format != GST_AUDIO_FORMAT_UNKNOWN, NULL);
|
|
|
|
if (format >= G_N_ELEMENTS (formats))
|
|
return NULL;
|
|
|
|
return GST_AUDIO_FORMAT_INFO_NAME (&formats[format]);
|
|
}
|
|
|
|
/**
|
|
* gst_audio_format_get_info:
|
|
* @format: a #GstAudioFormat
|
|
*
|
|
* Get the #GstAudioFormatInfo for @format
|
|
*
|
|
* Returns: The #GstAudioFormatInfo for @format.
|
|
*/
|
|
const GstAudioFormatInfo *
|
|
gst_audio_format_get_info (GstAudioFormat format)
|
|
{
|
|
g_return_val_if_fail (format < G_N_ELEMENTS (formats), NULL);
|
|
|
|
return &formats[format];
|
|
}
|
|
|
|
/**
|
|
* gst_audio_format_fill_silence:
|
|
* @info: a #GstAudioFormatInfo
|
|
* @dest: (array length=length) (element-type guint8): a destination
|
|
* to fill
|
|
* @length: the length to fill
|
|
*
|
|
* Fill @length bytes in @dest with silence samples for @info.
|
|
*/
|
|
void
|
|
gst_audio_format_fill_silence (const GstAudioFormatInfo * info,
|
|
gpointer dest, gsize length)
|
|
{
|
|
guint8 *dptr = dest;
|
|
|
|
g_return_if_fail (info != NULL);
|
|
g_return_if_fail (dest != NULL);
|
|
|
|
if (info->flags & GST_AUDIO_FORMAT_FLAG_FLOAT ||
|
|
info->flags & GST_AUDIO_FORMAT_FLAG_SIGNED) {
|
|
/* float or signed always 0 */
|
|
memset (dest, 0, length);
|
|
} else {
|
|
gint i, j, bps = info->width >> 3;
|
|
|
|
switch (bps) {
|
|
case 1:
|
|
memset (dest, info->silence[0], length);
|
|
break;
|
|
default:
|
|
for (i = 0; i < length; i += bps) {
|
|
for (j = 0; j < bps; j++)
|
|
*dptr++ = info->silence[j];
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|