move aac and ac3 parsers in their own files

Originally committed as revision 8941 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -275,8 +275,8 @@ OBJS-$(CONFIG_X264)                    += x264.o
 OBJS-$(CONFIG_XVID)                    += xvidff.o xvid_rc.o
 
 
-OBJS-$(CONFIG_AAC_PARSER)              += parser.o
-OBJS-$(CONFIG_AC3_PARSER)              += ac3tab.o
+OBJS-$(CONFIG_AAC_PARSER)              += aac_parser.o aac_ac3_parser.o
+OBJS-$(CONFIG_AC3_PARSER)              += ac3_parser.o ac3tab.o aac_ac3_parser.o
 OBJS-$(CONFIG_CAVSVIDEO_PARSER)        += cavs.o
 OBJS-$(CONFIG_DCA_PARSER)              += dca_parser.o
 OBJS-$(CONFIG_DVBSUB_PARSER)           += dvbsub_parser.o

libavcodec/aac_ac3_parser.c

@@ -0,0 +1,91 @@
+/*
+ * Common AAC and AC3 parser
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "parser.h"
+#include "aac_ac3_parser.h"
+
+int ac3_parse(AVCodecParserContext *s1,
+                     AVCodecContext *avctx,
+                     const uint8_t **poutbuf, int *poutbuf_size,
+                     const uint8_t *buf, int buf_size)
+{
+    AC3ParseContext *s = s1->priv_data;
+    const uint8_t *buf_ptr;
+    int len, sample_rate, bit_rate, channels, samples;
+
+    *poutbuf = NULL;
+    *poutbuf_size = 0;
+
+    buf_ptr = buf;
+    while (buf_size > 0) {
+        len = s->inbuf_ptr - s->inbuf;
+        if (s->frame_size == 0) {
+            /* no header seen : find one. We need at least s->header_size
+               bytes to parse it */
+            len = FFMIN(s->header_size - len, buf_size);
+
+            memcpy(s->inbuf_ptr, buf_ptr, len);
+            buf_ptr += len;
+            s->inbuf_ptr += len;
+            buf_size -= len;
+            if ((s->inbuf_ptr - s->inbuf) == s->header_size) {
+                len = s->sync(s->inbuf, &channels, &sample_rate, &bit_rate,
+                              &samples);
+                if (len == 0) {
+                    /* no sync found : move by one byte (inefficient, but simple!) */
+                    memmove(s->inbuf, s->inbuf + 1, s->header_size - 1);
+                    s->inbuf_ptr--;
+                } else {
+                    s->frame_size = len;
+                    /* update codec info */
+                    avctx->sample_rate = sample_rate;
+                    /* set channels,except if the user explicitly requests 1 or 2 channels, XXX/FIXME this is a bit ugly */
+                    if(avctx->codec_id == CODEC_ID_AC3){
+                        if(avctx->channels!=1 && avctx->channels!=2){
+                            avctx->channels = channels;
+                        }
+                    } else {
+                        avctx->channels = channels;
+                    }
+                    avctx->bit_rate = bit_rate;
+                    avctx->frame_size = samples;
+                }
+            }
+        } else {
+            len = FFMIN(s->frame_size - len, buf_size);
+
+            memcpy(s->inbuf_ptr, buf_ptr, len);
+            buf_ptr += len;
+            s->inbuf_ptr += len;
+            buf_size -= len;
+
+            if(s->inbuf_ptr - s->inbuf == s->frame_size){
+                *poutbuf = s->inbuf;
+                *poutbuf_size = s->frame_size;
+                s->inbuf_ptr = s->inbuf;
+                s->frame_size = 0;
+                break;
+            }
+        }
+    }
+    return buf_ptr - buf;
+}

libavcodec/aac_ac3_parser.h

@@ -0,0 +1,40 @@
+/*
+ * Common AAC and AC3 parser prototypes
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AAC_AC3_PARSER_H
+#define AAC_AC3_PARSER_H
+
+typedef struct AC3ParseContext {
+    uint8_t *inbuf_ptr;
+    int frame_size;
+    int header_size;
+    int (*sync)(const uint8_t *buf, int *channels, int *sample_rate,
+                int *bit_rate, int *samples);
+    uint8_t inbuf[8192]; /* input buffer */
+} AC3ParseContext;
+
+int ac3_parse(AVCodecParserContext *s1,
+                     AVCodecContext *avctx,
+                     const uint8_t **poutbuf, int *poutbuf_size,
+                     const uint8_t *buf, int buf_size);
+
+#endif /* AAC_AC3_PARSER_H */

libavcodec/aac_parser.c

@@ -0,0 +1,97 @@
+/*
+ * Audio and Video frame extraction
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "parser.h"
+#include "aac_ac3_parser.h"
+#include "bitstream.h"
+
+
+#define AAC_HEADER_SIZE 7
+
+
+static const int aac_sample_rates[16] = {
+    96000, 88200, 64000, 48000, 44100, 32000,
+    24000, 22050, 16000, 12000, 11025, 8000, 7350
+};
+
+static const int aac_channels[8] = {
+    0, 1, 2, 3, 4, 5, 6, 8
+};
+
+
+static int aac_sync(const uint8_t *buf, int *channels, int *sample_rate,
+                    int *bit_rate, int *samples)
+{
+    GetBitContext bits;
+    int size, rdb, ch, sr;
+
+    init_get_bits(&bits, buf, AAC_HEADER_SIZE * 8);
+
+    if(get_bits(&bits, 12) != 0xfff)
+        return 0;
+
+    skip_bits1(&bits);          /* id */
+    skip_bits(&bits, 2);        /* layer */
+    skip_bits1(&bits);          /* protection_absent */
+    skip_bits(&bits, 2);        /* profile_objecttype */
+    sr = get_bits(&bits, 4);    /* sample_frequency_index */
+    if(!aac_sample_rates[sr])
+        return 0;
+    skip_bits1(&bits);          /* private_bit */
+    ch = get_bits(&bits, 3);    /* channel_configuration */
+    if(!aac_channels[ch])
+        return 0;
+    skip_bits1(&bits);          /* original/copy */
+    skip_bits1(&bits);          /* home */
+
+    /* adts_variable_header */
+    skip_bits1(&bits);          /* copyright_identification_bit */
+    skip_bits1(&bits);          /* copyright_identification_start */
+    size = get_bits(&bits, 13); /* aac_frame_length */
+    skip_bits(&bits, 11);       /* adts_buffer_fullness */
+    rdb = get_bits(&bits, 2);   /* number_of_raw_data_blocks_in_frame */
+
+    *channels = aac_channels[ch];
+    *sample_rate = aac_sample_rates[sr];
+    *samples = (rdb + 1) * 1024;
+    *bit_rate = size * 8 * *sample_rate / *samples;
+
+    return size;
+}
+
+static int aac_parse_init(AVCodecParserContext *s1)
+{
+    AC3ParseContext *s = s1->priv_data;
+    s->inbuf_ptr = s->inbuf;
+    s->header_size = AAC_HEADER_SIZE;
+    s->sync = aac_sync;
+    return 0;
+}
+
+
+AVCodecParser aac_parser = {
+    { CODEC_ID_AAC },
+    sizeof(AC3ParseContext),
+    aac_parse_init,
+    ac3_parse,
+    NULL,
+};

libavcodec/ac3_parser.c

@@ -0,0 +1,162 @@
+/*
+ * AC3 parser
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "parser.h"
+#include "ac3_parser.h"
+#include "aac_ac3_parser.h"
+#include "bitstream.h"
+
+
+#define AC3_HEADER_SIZE 7
+
+
+static const uint8_t eac3_blocks[4] = {
+    1, 2, 3, 6
+};
+
+
+int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
+{
+    GetBitContext gbc;
+
+    memset(hdr, 0, sizeof(*hdr));
+
+    init_get_bits(&gbc, buf, 54);
+
+    hdr->sync_word = get_bits(&gbc, 16);
+    if(hdr->sync_word != 0x0B77)
+        return -1;
+
+    /* read ahead to bsid to make sure this is AC-3, not E-AC-3 */
+    hdr->bsid = show_bits_long(&gbc, 29) & 0x1F;
+    if(hdr->bsid > 10)
+        return -2;
+
+    hdr->crc1 = get_bits(&gbc, 16);
+    hdr->fscod = get_bits(&gbc, 2);
+    if(hdr->fscod == 3)
+        return -3;
+
+    hdr->frmsizecod = get_bits(&gbc, 6);
+    if(hdr->frmsizecod > 37)
+        return -4;
+
+    skip_bits(&gbc, 5); // skip bsid, already got it
+
+    hdr->bsmod = get_bits(&gbc, 3);
+    hdr->acmod = get_bits(&gbc, 3);
+    if((hdr->acmod & 1) && hdr->acmod != 1) {
+        hdr->cmixlev = get_bits(&gbc, 2);
+    }
+    if(hdr->acmod & 4) {
+        hdr->surmixlev = get_bits(&gbc, 2);
+    }
+    if(hdr->acmod == 2) {
+        hdr->dsurmod = get_bits(&gbc, 2);
+    }
+    hdr->lfeon = get_bits1(&gbc);
+
+    hdr->halfratecod = FFMAX(hdr->bsid, 8) - 8;
+    hdr->sample_rate = ff_ac3_freqs[hdr->fscod] >> hdr->halfratecod;
+    hdr->bit_rate = (ff_ac3_bitratetab[hdr->frmsizecod>>1] * 1000) >> hdr->halfratecod;
+    hdr->channels = ff_ac3_channels[hdr->acmod] + hdr->lfeon;
+    hdr->frame_size = ff_ac3_frame_sizes[hdr->frmsizecod][hdr->fscod] * 2;
+
+    return 0;
+}
+
+static int ac3_sync(const uint8_t *buf, int *channels, int *sample_rate,
+                    int *bit_rate, int *samples)
+{
+    int err;
+    unsigned int fscod, acmod, bsid, lfeon;
+    unsigned int strmtyp, substreamid, frmsiz, fscod2, numblkscod;
+    GetBitContext bits;
+    AC3HeaderInfo hdr;
+
+    err = ff_ac3_parse_header(buf, &hdr);
+
+    if(err < 0 && err != -2)
+        return 0;
+
+    bsid = hdr.bsid;
+    if(bsid <= 10) {             /* Normal AC-3 */
+        *sample_rate = hdr.sample_rate;
+        *bit_rate = hdr.bit_rate;
+        *channels = hdr.channels;
+        *samples = AC3_FRAME_SIZE;
+        return hdr.frame_size;
+    } else if (bsid > 10 && bsid <= 16) { /* Enhanced AC-3 */
+        init_get_bits(&bits, &buf[2], (AC3_HEADER_SIZE-2) * 8);
+        strmtyp = get_bits(&bits, 2);
+        substreamid = get_bits(&bits, 3);
+
+        if (strmtyp != 0 || substreamid != 0)
+            return 0;   /* Currently don't support additional streams */
+
+        frmsiz = get_bits(&bits, 11) + 1;
+        fscod = get_bits(&bits, 2);
+        if (fscod == 3) {
+            fscod2 = get_bits(&bits, 2);
+            numblkscod = 3;
+
+            if(fscod2 == 3)
+                return 0;
+
+            *sample_rate = ff_ac3_freqs[fscod2] / 2;
+        } else {
+            numblkscod = get_bits(&bits, 2);
+
+            *sample_rate = ff_ac3_freqs[fscod];
+        }
+
+        acmod = get_bits(&bits, 3);
+        lfeon = get_bits1(&bits);
+
+        *samples = eac3_blocks[numblkscod] * 256;
+        *bit_rate = frmsiz * (*sample_rate) * 16 / (*samples);
+        *channels = ff_ac3_channels[acmod] + lfeon;
+
+        return frmsiz * 2;
+    }
+
+    /* Unsupported bitstream version */
+    return 0;
+}
+
+static int ac3_parse_init(AVCodecParserContext *s1)
+{
+    AC3ParseContext *s = s1->priv_data;
+    s->inbuf_ptr = s->inbuf;
+    s->header_size = AC3_HEADER_SIZE;
+    s->sync = ac3_sync;
+    return 0;
+}
+
+
+AVCodecParser ac3_parser = {
+    { CODEC_ID_AC3 },
+    sizeof(AC3ParseContext),
+    ac3_parse_init,
+    ac3_parse,
+    NULL,
+};

libavcodec/ac3_parser.h

@@ -0,0 +1,40 @@
+/*
+ * AC3 parser prototypes
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AC3_PARSER_H
+#define AC3_PARSER_H
+
+#include "ac3.h"
+
+/**
+ * Parses AC-3 frame header.
+ * Parses the header up to the lfeon element, which is the first 52 or 54 bits
+ * depending on the audio coding mode.
+ * @param buf[in] Array containing the first 7 bytes of the frame.
+ * @param hdr[out] Pointer to struct where header info is written.
+ * @return Returns 0 on success, -1 if there is a sync word mismatch,
+ * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
+ * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
+ */
+int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr);
+
+#endif /* AC3_PARSER_H */

libavcodec/parser.c

@@ -311,301 +311,3 @@ int ff_mpeg4video_split(AVCodecContext *avctx,
     }
     return 0;
 }
-
-/*************************/
-
-#if defined(CONFIG_AC3_PARSER) || defined(CONFIG_AAC_PARSER)
-/* also used for ADTS AAC */
-typedef struct AC3ParseContext {
-    uint8_t *inbuf_ptr;
-    int frame_size;
-    int header_size;
-    int (*sync)(const uint8_t *buf, int *channels, int *sample_rate,
-                int *bit_rate, int *samples);
-    uint8_t inbuf[8192]; /* input buffer */
-} AC3ParseContext;
-
-#define AC3_HEADER_SIZE 7
-#define AAC_HEADER_SIZE 7
-
-#ifdef CONFIG_AC3_PARSER
-
-static const uint8_t eac3_blocks[4] = {
-    1, 2, 3, 6
-};
-
-#endif /* CONFIG_AC3_PARSER */
-
-#ifdef CONFIG_AAC_PARSER
-static const int aac_sample_rates[16] = {
-    96000, 88200, 64000, 48000, 44100, 32000,
-    24000, 22050, 16000, 12000, 11025, 8000, 7350
-};
-
-static const int aac_channels[8] = {
-    0, 1, 2, 3, 4, 5, 6, 8
-};
-#endif
-
-#ifdef CONFIG_AC3_PARSER
-int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
-{
-    GetBitContext gbc;
-
-    memset(hdr, 0, sizeof(*hdr));
-
-    init_get_bits(&gbc, buf, 54);
-
-    hdr->sync_word = get_bits(&gbc, 16);
-    if(hdr->sync_word != 0x0B77)
-        return -1;
-
-    /* read ahead to bsid to make sure this is AC-3, not E-AC-3 */
-    hdr->bsid = show_bits_long(&gbc, 29) & 0x1F;
-    if(hdr->bsid > 10)
-        return -2;
-
-    hdr->crc1 = get_bits(&gbc, 16);
-    hdr->fscod = get_bits(&gbc, 2);
-    if(hdr->fscod == 3)
-        return -3;
-
-    hdr->frmsizecod = get_bits(&gbc, 6);
-    if(hdr->frmsizecod > 37)
-        return -4;
-
-    skip_bits(&gbc, 5); // skip bsid, already got it
-
-    hdr->bsmod = get_bits(&gbc, 3);
-    hdr->acmod = get_bits(&gbc, 3);
-    if((hdr->acmod & 1) && hdr->acmod != 1) {
-        hdr->cmixlev = get_bits(&gbc, 2);
-    }
-    if(hdr->acmod & 4) {
-        hdr->surmixlev = get_bits(&gbc, 2);
-    }
-    if(hdr->acmod == 2) {
-        hdr->dsurmod = get_bits(&gbc, 2);
-    }
-    hdr->lfeon = get_bits1(&gbc);
-
-    hdr->halfratecod = FFMAX(hdr->bsid, 8) - 8;
-    hdr->sample_rate = ff_ac3_freqs[hdr->fscod] >> hdr->halfratecod;
-    hdr->bit_rate = (ff_ac3_bitratetab[hdr->frmsizecod>>1] * 1000) >> hdr->halfratecod;
-    hdr->channels = ff_ac3_channels[hdr->acmod] + hdr->lfeon;
-    hdr->frame_size = ff_ac3_frame_sizes[hdr->frmsizecod][hdr->fscod] * 2;
-
-    return 0;
-}
-
-static int ac3_sync(const uint8_t *buf, int *channels, int *sample_rate,
-                    int *bit_rate, int *samples)
-{
-    int err;
-    unsigned int fscod, acmod, bsid, lfeon;
-    unsigned int strmtyp, substreamid, frmsiz, fscod2, numblkscod;
-    GetBitContext bits;
-    AC3HeaderInfo hdr;
-
-    err = ff_ac3_parse_header(buf, &hdr);
-
-    if(err < 0 && err != -2)
-        return 0;
-
-    bsid = hdr.bsid;
-    if(bsid <= 10) {             /* Normal AC-3 */
-        *sample_rate = hdr.sample_rate;
-        *bit_rate = hdr.bit_rate;
-        *channels = hdr.channels;
-        *samples = AC3_FRAME_SIZE;
-        return hdr.frame_size;
-    } else if (bsid > 10 && bsid <= 16) { /* Enhanced AC-3 */
-        init_get_bits(&bits, &buf[2], (AC3_HEADER_SIZE-2) * 8);
-        strmtyp = get_bits(&bits, 2);
-        substreamid = get_bits(&bits, 3);
-
-        if (strmtyp != 0 || substreamid != 0)
-            return 0;   /* Currently don't support additional streams */
-
-        frmsiz = get_bits(&bits, 11) + 1;
-        fscod = get_bits(&bits, 2);
-        if (fscod == 3) {
-            fscod2 = get_bits(&bits, 2);
-            numblkscod = 3;
-
-            if(fscod2 == 3)
-                return 0;
-
-            *sample_rate = ff_ac3_freqs[fscod2] / 2;
-        } else {
-            numblkscod = get_bits(&bits, 2);
-
-            *sample_rate = ff_ac3_freqs[fscod];
-        }
-
-        acmod = get_bits(&bits, 3);
-        lfeon = get_bits1(&bits);
-
-        *samples = eac3_blocks[numblkscod] * 256;
-        *bit_rate = frmsiz * (*sample_rate) * 16 / (*samples);
-        *channels = ff_ac3_channels[acmod] + lfeon;
-
-        return frmsiz * 2;
-    }
-
-    /* Unsupported bitstream version */
-    return 0;
-}
-#endif /* CONFIG_AC3_PARSER */
-
-#ifdef CONFIG_AAC_PARSER
-static int aac_sync(const uint8_t *buf, int *channels, int *sample_rate,
-                    int *bit_rate, int *samples)
-{
-    GetBitContext bits;
-    int size, rdb, ch, sr;
-
-    init_get_bits(&bits, buf, AAC_HEADER_SIZE * 8);
-
-    if(get_bits(&bits, 12) != 0xfff)
-        return 0;
-
-    skip_bits1(&bits);          /* id */
-    skip_bits(&bits, 2);        /* layer */
-    skip_bits1(&bits);          /* protection_absent */
-    skip_bits(&bits, 2);        /* profile_objecttype */
-    sr = get_bits(&bits, 4);    /* sample_frequency_index */
-    if(!aac_sample_rates[sr])
-        return 0;
-    skip_bits1(&bits);          /* private_bit */
-    ch = get_bits(&bits, 3);    /* channel_configuration */
-    if(!aac_channels[ch])
-        return 0;
-    skip_bits1(&bits);          /* original/copy */
-    skip_bits1(&bits);          /* home */
-
-    /* adts_variable_header */
-    skip_bits1(&bits);          /* copyright_identification_bit */
-    skip_bits1(&bits);          /* copyright_identification_start */
-    size = get_bits(&bits, 13); /* aac_frame_length */
-    skip_bits(&bits, 11);       /* adts_buffer_fullness */
-    rdb = get_bits(&bits, 2);   /* number_of_raw_data_blocks_in_frame */
-
-    *channels = aac_channels[ch];
-    *sample_rate = aac_sample_rates[sr];
-    *samples = (rdb + 1) * 1024;
-    *bit_rate = size * 8 * *sample_rate / *samples;
-
-    return size;
-}
-#endif /* CONFIG_AAC_PARSER */
-
-#ifdef CONFIG_AC3_PARSER
-static int ac3_parse_init(AVCodecParserContext *s1)
-{
-    AC3ParseContext *s = s1->priv_data;
-    s->inbuf_ptr = s->inbuf;
-    s->header_size = AC3_HEADER_SIZE;
-    s->sync = ac3_sync;
-    return 0;
-}
-#endif
-
-#ifdef CONFIG_AAC_PARSER
-static int aac_parse_init(AVCodecParserContext *s1)
-{
-    AC3ParseContext *s = s1->priv_data;
-    s->inbuf_ptr = s->inbuf;
-    s->header_size = AAC_HEADER_SIZE;
-    s->sync = aac_sync;
-    return 0;
-}
-#endif
-
-/* also used for ADTS AAC */
-static int ac3_parse(AVCodecParserContext *s1,
-                     AVCodecContext *avctx,
-                     const uint8_t **poutbuf, int *poutbuf_size,
-                     const uint8_t *buf, int buf_size)
-{
-    AC3ParseContext *s = s1->priv_data;
-    const uint8_t *buf_ptr;
-    int len, sample_rate, bit_rate, channels, samples;
-
-    *poutbuf = NULL;
-    *poutbuf_size = 0;
-
-    buf_ptr = buf;
-    while (buf_size > 0) {
-        len = s->inbuf_ptr - s->inbuf;
-        if (s->frame_size == 0) {
-            /* no header seen : find one. We need at least s->header_size
-               bytes to parse it */
-            len = FFMIN(s->header_size - len, buf_size);
-
-            memcpy(s->inbuf_ptr, buf_ptr, len);
-            buf_ptr += len;
-            s->inbuf_ptr += len;
-            buf_size -= len;
-            if ((s->inbuf_ptr - s->inbuf) == s->header_size) {
-                len = s->sync(s->inbuf, &channels, &sample_rate, &bit_rate,
-                              &samples);
-                if (len == 0) {
-                    /* no sync found : move by one byte (inefficient, but simple!) */
-                    memmove(s->inbuf, s->inbuf + 1, s->header_size - 1);
-                    s->inbuf_ptr--;
-                } else {
-                    s->frame_size = len;
-                    /* update codec info */
-                    avctx->sample_rate = sample_rate;
-                    /* set channels,except if the user explicitly requests 1 or 2 channels, XXX/FIXME this is a bit ugly */
-                    if(avctx->codec_id == CODEC_ID_AC3){
-                        if(avctx->channels!=1 && avctx->channels!=2){
-                            avctx->channels = channels;
-                        }
-                    } else {
-                        avctx->channels = channels;
-                    }
-                    avctx->bit_rate = bit_rate;
-                    avctx->frame_size = samples;
-                }
-            }
-        } else {
-            len = FFMIN(s->frame_size - len, buf_size);
-
-            memcpy(s->inbuf_ptr, buf_ptr, len);
-            buf_ptr += len;
-            s->inbuf_ptr += len;
-            buf_size -= len;
-
-            if(s->inbuf_ptr - s->inbuf == s->frame_size){
-                *poutbuf = s->inbuf;
-                *poutbuf_size = s->frame_size;
-                s->inbuf_ptr = s->inbuf;
-                s->frame_size = 0;
-                break;
-            }
-        }
-    }
-    return buf_ptr - buf;
-}
-#endif /* CONFIG_AC3_PARSER || CONFIG_AAC_PARSER */
-
-#ifdef CONFIG_AC3_PARSER
-AVCodecParser ac3_parser = {
-    { CODEC_ID_AC3 },
-    sizeof(AC3ParseContext),
-    ac3_parse_init,
-    ac3_parse,
-    NULL,
-};
-#endif
-#ifdef CONFIG_AAC_PARSER
-AVCodecParser aac_parser = {
-    { CODEC_ID_AAC },
-    sizeof(AC3ParseContext),
-    aac_parse_init,
-    ac3_parse,
-    NULL,
-};
-#endif

libavcodec/parser.h

@@ -24,7 +24,6 @@
 #define FFMPEG_PARSER_H
 
 #include "avcodec.h"
-#include "ac3.h"
 
 typedef struct ParseContext{
     uint8_t *buffer;
@@ -63,16 +62,4 @@ void ff_parse1_close(AVCodecParserContext *s);
 /* h263dec.c */
 int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 
-/**
- * Parses AC-3 frame header.
- * Parses the header up to the lfeon element, which is the first 52 or 54 bits
- * depending on the audio coding mode.
- * @param buf[in] Array containing the first 7 bytes of the frame.
- * @param hdr[out] Pointer to struct where header info is written.
- * @return Returns 0 on success, -1 if there is a sync word mismatch,
- * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
- * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
- */
-int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr);
-
 #endif /* !FFMPEG_PARSER_H */

libavformat/raw.c

@@ -20,7 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "parser.h"
+#include "ac3_parser.h"
 
 #ifdef CONFIG_MUXERS
 /* simple formats */