s/IEC958/IEC 61937 - IEC958 is a lower level format.

Patch by Anssi Hannula, anssi d hannula a iki d fi

Originally committed as revision 26141 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 31 insertions, 31 deletions

diff --git a/libavformat/spdifenc.c b/libavformat/spdifenc.c
index dd9ff85784..e7be807334 100644
--- a/libavformat/spdifenc.c
+++ b/libavformat/spdifenc.c
@@ -1,5 +1,5 @@
 /*
- * IEC958 muxer
+ * IEC 61937 muxer
  * Copyright (c) 2009 Bartlomiej Wolowiec
  * Copyright (c) 2010 Anssi Hannula
  * Copyright (c) 2010 Carl Eugen Hoyos
@@ -31,8 +31,8 @@
 
 /*
  * Terminology used in specification:
- * data-burst - IEC958 frame, contains header and encapsuled frame
- * burst-preambule - IEC958 frame header, contains 16-bits words named Pa, Pb, Pc and Pd
+ * data-burst - IEC61937 frame, contains header and encapsuled frame
+ * burst-preambule - IEC61937 frame header, contains 16-bits words named Pa, Pb, Pc and Pd
  * burst-payload - encapsuled frame
  * Pa, Pb - syncword - 0xF872, 0x4E1F
  * Pc - burst-info, contains data-type (bits 0-6), error flag (bit 7), data-type-dependent info (bits 8-12)
@@ -40,7 +40,7 @@
  * data-type - determines type of encapsuled frames
  * Pd - length code (number of bits or bytes of encapsuled frame - according to data_type)
  *
- * IEC958 frames at normal usage start every specific count of bytes,
+ * IEC 61937 frames at normal usage start every specific count of bytes,
  *      dependent from data-type (spaces between packets are filled by zeros)
  */
 
@@ -50,8 +50,8 @@
 #include "libavcodec/dca.h"
 #include "libavcodec/aacadtsdec.h"
 
-typedef struct IEC958Context {
-    enum IEC958DataType data_type;  ///< burst info - reference to type of payload of the data-burst
+typedef struct IEC61937Context {
+    enum IEC61937DataType data_type;///< burst info - reference to type of payload of the data-burst
     int length_code;                ///< length code in bits or bytes, depending on data type
     int pkt_offset;                 ///< data burst repetition period in bytes
     uint8_t *buffer;                ///< allocated buffer, used for swap bytes
@@ -70,22 +70,22 @@ typedef struct IEC958Context {
     /// function, which generates codec dependent header information.
     /// Sets data_type and pkt_offset, and length_code, out_bytes, out_buf if necessary
     int (*header_info) (AVFormatContext *s, AVPacket *pkt);
-} IEC958Context;
+} IEC61937Context;
 
 
 static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     int bitstream_mode = pkt->data[5] & 0x7;
 
-    ctx->data_type  = IEC958_AC3 | (bitstream_mode << 8);
+    ctx->data_type  = IEC61937_AC3 | (bitstream_mode << 8);
     ctx->pkt_offset = AC3_FRAME_SIZE << 2;
     return 0;
 }
 
 static int spdif_header_eac3(AVFormatContext *s, AVPacket *pkt)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     static const uint8_t eac3_repeat[4] = {6, 3, 2, 1};
     int repeat = 1;
 
@@ -103,7 +103,7 @@ static int spdif_header_eac3(AVFormatContext *s, AVPacket *pkt)
         ctx->pkt_offset = 0;
         return 0;
     }
-    ctx->data_type   = IEC958_EAC3;
+    ctx->data_type   = IEC61937_EAC3;
     ctx->pkt_offset  = 24576;
     ctx->out_buf     = ctx->hd_buf;
     ctx->out_bytes   = ctx->hd_buf_filled;
@@ -116,7 +116,7 @@ static int spdif_header_eac3(AVFormatContext *s, AVPacket *pkt)
 
 static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     uint32_t syncword_dts = AV_RB32(pkt->data);
     int blocks;
 
@@ -143,9 +143,9 @@ static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
     }
     blocks++;
     switch (blocks) {
-    case  512 >> 5: ctx->data_type = IEC958_DTS1; break;
-    case 1024 >> 5: ctx->data_type = IEC958_DTS2; break;
-    case 2048 >> 5: ctx->data_type = IEC958_DTS3; break;
+    case  512 >> 5: ctx->data_type = IEC61937_DTS1; break;
+    case 1024 >> 5: ctx->data_type = IEC61937_DTS2; break;
+    case 2048 >> 5: ctx->data_type = IEC61937_DTS3; break;
     default:
         av_log(s, AV_LOG_ERROR, "%i samples in DTS frame not supported\n",
                blocks << 5);
@@ -156,15 +156,15 @@ static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
     return 0;
 }
 
-static const enum IEC958DataType mpeg_data_type[2][3] = {
+static const enum IEC61937DataType mpeg_data_type[2][3] = {
     //     LAYER1                      LAYER2                  LAYER3
-    { IEC958_MPEG2_LAYER1_LSF, IEC958_MPEG2_LAYER2_LSF, IEC958_MPEG2_LAYER3_LSF },  //MPEG2 LSF
-    { IEC958_MPEG1_LAYER1,     IEC958_MPEG1_LAYER23,    IEC958_MPEG1_LAYER23 },     //MPEG1
+    { IEC61937_MPEG2_LAYER1_LSF, IEC61937_MPEG2_LAYER2_LSF, IEC61937_MPEG2_LAYER3_LSF },//MPEG2 LSF
+    { IEC61937_MPEG1_LAYER1,     IEC61937_MPEG1_LAYER23,    IEC61937_MPEG1_LAYER23 },   //MPEG1
 };
 
 static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     int version =      (pkt->data[1] >> 3) & 3;
     int layer   = 3 - ((pkt->data[1] >> 1) & 3);
     int extension = pkt->data[2] & 1;
@@ -175,7 +175,7 @@ static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
     }
     av_log(s, AV_LOG_DEBUG, "version: %i layer: %i extension: %i\n", version, layer, extension);
     if (version == 2 && extension) {
-        ctx->data_type  = IEC958_MPEG2_EXT;
+        ctx->data_type  = IEC61937_MPEG2_EXT;
         ctx->pkt_offset = 4608;
     } else {
         ctx->data_type  = mpeg_data_type [version & 1][layer];
@@ -187,7 +187,7 @@ static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
 
 static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     AACADTSHeaderInfo hdr;
     GetBitContext gbc;
     int ret;
@@ -202,13 +202,13 @@ static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
     ctx->pkt_offset = hdr.samples << 2;
     switch (hdr.num_aac_frames) {
     case 1:
-        ctx->data_type = IEC958_MPEG2_AAC;
+        ctx->data_type = IEC61937_MPEG2_AAC;
         break;
     case 2:
-        ctx->data_type = IEC958_MPEG2_AAC_LSF_2048;
+        ctx->data_type = IEC61937_MPEG2_AAC_LSF_2048;
         break;
     case 4:
-        ctx->data_type = IEC958_MPEG2_AAC_LSF_4096;
+        ctx->data_type = IEC61937_MPEG2_AAC_LSF_4096;
         break;
     default:
         av_log(s, AV_LOG_ERROR, "%i samples in AAC frame not supported\n",
@@ -235,7 +235,7 @@ static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
 
 static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     int mat_code_length = 0;
     const char mat_end_code[16] = { 0xC3, 0xC2, 0xC0, 0xC4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x97, 0x11 };
 
@@ -271,7 +271,7 @@ static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
     memcpy(&ctx->hd_buf[MAT_FRAME_SIZE - sizeof(mat_end_code)], mat_end_code, sizeof(mat_end_code));
     ctx->hd_buf_count = 0;
 
-    ctx->data_type   = IEC958_TRUEHD;
+    ctx->data_type   = IEC61937_TRUEHD;
     ctx->pkt_offset  = 61440;
     ctx->out_buf     = ctx->hd_buf;
     ctx->out_bytes   = MAT_FRAME_SIZE;
@@ -281,7 +281,7 @@ static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
 
 static int spdif_write_header(AVFormatContext *s)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
 
     switch (s->streams[0]->codec->codec_id) {
     case CODEC_ID_AC3:
@@ -316,7 +316,7 @@ static int spdif_write_header(AVFormatContext *s)
 
 static int spdif_write_trailer(AVFormatContext *s)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     av_freep(&ctx->buffer);
     av_freep(&ctx->hd_buf);
     return 0;
@@ -324,7 +324,7 @@ static int spdif_write_trailer(AVFormatContext *s)
 
 static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
-    IEC958Context *ctx = s->priv_data;
+    IEC61937Context *ctx = s->priv_data;
     int ret, padding;
 
     ctx->out_buf = pkt->data;
@@ -374,10 +374,10 @@ static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 
 AVOutputFormat spdif_muxer = {
     "spdif",
-    NULL_IF_CONFIG_SMALL("IEC958 - S/PDIF (IEC-61937)"),
+    NULL_IF_CONFIG_SMALL("IEC 61937 (used on S/PDIF - IEC958)"),
     NULL,
     "spdif",
-    sizeof(IEC958Context),
+    sizeof(IEC61937Context),
     CODEC_ID_AC3,
     CODEC_ID_NONE,
     spdif_write_header,