56dc1ffd50
Fixed wxStreamBuffer to support features of wxMemoryOutputStream wxMMedia2 updates (various fixes) git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4406 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
226 lines
5.3 KiB
C++
226 lines
5.3 KiB
C++
// --------------------------------------------------------------------------
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// Name: sndcpcm.cpp
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// Purpose:
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// Date: 08/11/1999
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// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
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// CVSID: $Id$
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// --------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma implementation "sndcpcm.cpp"
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#endif
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#include <wx/wxprec.h>
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#include "sndbase.h"
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#include "sndpcm.h"
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#include "sndcpcm.h"
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wxSoundStreamPcm::wxSoundStreamPcm(wxSoundStream& sndio)
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: wxSoundStreamCodec(sndio)
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{
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m_function_in = NULL;
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m_function_out = NULL;
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}
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wxSoundStreamPcm::~wxSoundStreamPcm()
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{
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}
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#define SWAP_BYTES 0
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#include "converter.def"
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#undef SWAP_BYTES
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#define SWAP_BYTES 1
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#include "converter.def"
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#undef SWAP_BYTES
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wxSoundStreamPcm::ConverterType s_convert_out_16_to_8[] = {
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Convert_16to8_16_no,
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Convert_16to8_U2S_16_no,
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NULL,
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NULL,
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Convert_16to8_U2S_16_yes,
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Convert_16to8_16_yes
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};
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wxSoundStreamPcm::ConverterType s_convert_out_16[] = {
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NULL,
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Convert_U2S_16_no,
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Convert_U2S_SWAP_16_no,
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Convert_U2S_SWAP_16_yes,
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Convert_U2S_16_yes,
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Convert_SWAP_16_no
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};
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wxSoundStreamPcm::ConverterType s_convert_out_8[] = {
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NULL,
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Convert_U2S_8,
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Convert_U2S_8,
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Convert_U2S_8,
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Convert_U2S_8,
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NULL
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/*,
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Convert_U2S_S2M_8,
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Convert_U2S_S2M_8,
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Convert_U2S_S2M_8,
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Convert_U2S_S2M_8,
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Convert_S2M_8 */
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};
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wxSoundStreamPcm::ConverterType s_convert_in_8_to_16[] = {
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Convert_8to16_8,
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Convert_8to16_U2S_8,
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Convert_8to16_U2S_SWAP_8,
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NULL,
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NULL,
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Convert_8to16_SWAP_8
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};
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wxSoundStreamPcm::ConverterType *s_convert_in_16 = s_convert_out_16;
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wxSoundStreamPcm::ConverterType *s_convert_in_8 = s_convert_out_8;
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#define CONVERTER 0
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#define CONVERTER_SIGN 1
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#define CONVERTER_SIGN_SWAP 2
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#define CONVERTER_SWAP_SIGN_SWAP 3
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#define CONVERTER_SWAP_SIGN 4
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#define CONVERTER_SWAP 5
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#define CONVERTER_SIGN_STEREO_MONO 6
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#define CONVERTER_SIGN_SWAP_STEREO_MONO 7
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#define CONVERTER_SWAP_SIGN_SWAP_STEREO_MONO 8
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#define CONVERTER_SWAP_SIGN_STEREO_MONO 9
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#define CONVERTER_SWAP_STEREO_MONO 10
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#define CONVERTER_STEREO_MONO 11
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//
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// TODO: Read() and Write() aren't really safe. If you give it a buffer which
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// is not aligned on 8, you may crash (See converter.def).
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//
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wxSoundStream& wxSoundStreamPcm::Read(void *buffer, wxUint32 len)
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{
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wxUint32 real_len;
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char *tmp_buf;
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if (!m_function_in) {
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m_sndio->Read(buffer, len);
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m_lastcount = m_sndio->GetLastAccess();
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m_snderror = m_sndio->GetError();
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return *this;
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}
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real_len = (m_16_to_8) ? len / 2 : len;
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tmp_buf = new char[real_len];
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m_sndio->Read(tmp_buf, real_len);
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m_lastcount = m_sndio->GetLastAccess();
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m_snderror = m_sndio->GetError();
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if (m_snderror != wxSOUND_NOERR)
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return *this;
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m_function_in(tmp_buf, (char *)buffer, m_lastcount);
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delete[] tmp_buf;
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if (m_16_to_8)
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m_lastcount *= 2;
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return *this;
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}
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wxSoundStream& wxSoundStreamPcm::Write(const void *buffer, wxUint32 len)
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{
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char *tmp_buf;
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wxUint32 len2;
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if (!m_function_out)
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return m_sndio->Write(buffer, len);
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len2 = (m_16_to_8) ? len / 2 : len;
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tmp_buf = new char[len2];
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m_function_out((const char *)buffer, tmp_buf, len);
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m_sndio->Write(tmp_buf, len);
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delete[] tmp_buf;
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m_lastcount = (m_16_to_8) ?
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(m_sndio->GetLastAccess() * 2) : m_sndio->GetLastAccess();
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return *this;
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}
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bool wxSoundStreamPcm::SetSoundFormat(const wxSoundFormatBase& format)
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{
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wxSoundFormatBase *new_format;
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wxSoundFormatPcm *pcm_format, *pcm_format2;
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ConverterType *current_table_out, *current_table_in;
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int index;
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bool change_sign;
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if (m_sndio->SetSoundFormat(format)) {
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m_function_out = NULL;
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m_function_in = NULL;
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return TRUE;
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}
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if (format.GetType() != wxSOUND_PCM) {
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m_snderror = wxSOUND_INVFRMT;
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return FALSE;
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}
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if (m_sndformat)
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delete m_sndformat;
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new_format = m_sndio->GetSoundFormat().Clone();
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pcm_format = (wxSoundFormatPcm *)&format;
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pcm_format2 = (wxSoundFormatPcm *)new_format;
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m_16_to_8 = FALSE;
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if (pcm_format->GetBPS() != pcm_format2->GetBPS()) {
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m_16_to_8 = TRUE;
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current_table_out = s_convert_out_16_to_8;
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current_table_in = s_convert_in_8_to_16;
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} else if (pcm_format->GetBPS() == 16) {
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current_table_out = s_convert_out_16;
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current_table_in = s_convert_in_16;
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} else {
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current_table_out = s_convert_out_8;
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current_table_in = s_convert_in_8;
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}
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change_sign = (pcm_format2->Signed() != pcm_format->Signed());
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#define MY_ORDER wxBYTE_ORDER
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#if wxBYTE_ORDER == wxLITTLE_ENDIAN
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#define OTHER_ORDER wxBIG_ENDIAN
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#else
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#define OTHER_ORDER wxLITTLE_ENDIAN
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#endif
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if (pcm_format->GetOrder() == OTHER_ORDER &&
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pcm_format2->GetOrder() == OTHER_ORDER && change_sign)
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index = CONVERTER_SWAP_SIGN_SWAP;
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else if (pcm_format->GetOrder() == OTHER_ORDER &&
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pcm_format2->GetOrder() == MY_ORDER && change_sign)
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index = CONVERTER_SWAP_SIGN;
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else if (pcm_format->GetOrder() == MY_ORDER &&
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pcm_format->GetOrder() == OTHER_ORDER && change_sign)
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index = CONVERTER_SIGN_SWAP;
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else if (!change_sign &&
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pcm_format->GetOrder() != pcm_format2->GetOrder())
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index = CONVERTER_SWAP;
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else
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index = CONVERTER;
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m_function_out = current_table_out[index];
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m_function_in = current_table_in[index];
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m_sndio->SetSoundFormat(*new_format);
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m_sndformat = new_format;
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return TRUE;
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}
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