move AVCodecParser prototypes and definitions to parser.h, and move mpegvideo parser to mpeg12.c

Originally committed as revision 6914 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpeg12.c

@@ -3312,6 +3312,169 @@ AVCodec mpeg_xvmc_decoder = {
 
 #endif
 
+#ifdef CONFIG_MPEGVIDEO_PARSER
+static void mpegvideo_extract_headers(AVCodecParserContext *s,
+                                      AVCodecContext *avctx,
+                                      const uint8_t *buf, int buf_size)
+{
+    ParseContext1 *pc = s->priv_data;
+    const uint8_t *buf_end;
+    uint32_t start_code;
+    int frame_rate_index, ext_type, bytes_left;
+    int frame_rate_ext_n, frame_rate_ext_d;
+    int picture_structure, top_field_first, repeat_first_field, progressive_frame;
+    int horiz_size_ext, vert_size_ext, bit_rate_ext;
+//FIXME replace the crap with get_bits()
+    s->repeat_pict = 0;
+    buf_end = buf + buf_size;
+    while (buf < buf_end) {
+        start_code= -1;
+        buf= ff_find_start_code(buf, buf_end, &start_code);
+        bytes_left = buf_end - buf;
+        switch(start_code) {
+        case PICTURE_START_CODE:
+            if (bytes_left >= 2) {
+                s->pict_type = (buf[1] >> 3) & 7;
+            }
+            break;
+        case SEQ_START_CODE:
+            if (bytes_left >= 7) {
+                pc->width  = (buf[0] << 4) | (buf[1] >> 4);
+                pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
+                avcodec_set_dimensions(avctx, pc->width, pc->height);
+                frame_rate_index = buf[3] & 0xf;
+                pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
+                pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
+                avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
+                avctx->codec_id = CODEC_ID_MPEG1VIDEO;
+                avctx->sub_id = 1;
+            }
+            break;
+        case EXT_START_CODE:
+            if (bytes_left >= 1) {
+                ext_type = (buf[0] >> 4);
+                switch(ext_type) {
+                case 0x1: /* sequence extension */
+                    if (bytes_left >= 6) {
+                        horiz_size_ext = ((buf[1] & 1) << 1) | (buf[2] >> 7);
+                        vert_size_ext = (buf[2] >> 5) & 3;
+                        bit_rate_ext = ((buf[2] & 0x1F)<<7) | (buf[3]>>1);
+                        frame_rate_ext_n = (buf[5] >> 5) & 3;
+                        frame_rate_ext_d = (buf[5] & 0x1f);
+                        pc->progressive_sequence = buf[1] & (1 << 3);
+                        avctx->has_b_frames= !(buf[5] >> 7);
+
+                        pc->width  |=(horiz_size_ext << 12);
+                        pc->height |=( vert_size_ext << 12);
+                        avctx->bit_rate += (bit_rate_ext << 18) * 400;
+                        avcodec_set_dimensions(avctx, pc->width, pc->height);
+                        avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
+                        avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
+                        avctx->codec_id = CODEC_ID_MPEG2VIDEO;
+                        avctx->sub_id = 2; /* forces MPEG2 */
+                    }
+                    break;
+                case 0x8: /* picture coding extension */
+                    if (bytes_left >= 5) {
+                        picture_structure = buf[2]&3;
+                        top_field_first = buf[3] & (1 << 7);
+                        repeat_first_field = buf[3] & (1 << 1);
+                        progressive_frame = buf[4] & (1 << 7);
+
+                        /* check if we must repeat the frame */
+                        if (repeat_first_field) {
+                            if (pc->progressive_sequence) {
+                                if (top_field_first)
+                                    s->repeat_pict = 4;
+                                else
+                                    s->repeat_pict = 2;
+                            } else if (progressive_frame) {
+                                s->repeat_pict = 1;
+                            }
+                        }
+
+                        /* the packet only represents half a frame
+                           XXX,FIXME maybe find a different solution */
+                        if(picture_structure != 3)
+                            s->repeat_pict = -1;
+                    }
+                    break;
+                }
+            }
+            break;
+        case -1:
+            goto the_end;
+        default:
+            /* we stop parsing when we encounter a slice. It ensures
+               that this function takes a negligible amount of time */
+            if (start_code >= SLICE_MIN_START_CODE &&
+                start_code <= SLICE_MAX_START_CODE)
+                goto the_end;
+            break;
+        }
+    }
+ the_end: ;
+}
+
+static int mpegvideo_parse(AVCodecParserContext *s,
+                           AVCodecContext *avctx,
+                           uint8_t **poutbuf, int *poutbuf_size,
+                           const uint8_t *buf, int buf_size)
+{
+    ParseContext1 *pc1 = s->priv_data;
+    ParseContext *pc= &pc1->pc;
+    int next;
+
+    if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
+        next= buf_size;
+    }else{
+        next= ff_mpeg1_find_frame_end(pc, buf, buf_size);
+
+        if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
+            *poutbuf = NULL;
+            *poutbuf_size = 0;
+            return buf_size;
+        }
+
+    }
+    /* we have a full frame : we just parse the first few MPEG headers
+       to have the full timing information. The time take by this
+       function should be negligible for uncorrupted streams */
+    mpegvideo_extract_headers(s, avctx, buf, buf_size);
+#if 0
+    printf("pict_type=%d frame_rate=%0.3f repeat_pict=%d\n",
+           s->pict_type, (double)avctx->time_base.den / avctx->time_base.num, s->repeat_pict);
+#endif
+
+    *poutbuf = (uint8_t *)buf;
+    *poutbuf_size = buf_size;
+    return next;
+}
+
+static int mpegvideo_split(AVCodecContext *avctx,
+                           const uint8_t *buf, int buf_size)
+{
+    int i;
+    uint32_t state= -1;
+
+    for(i=0; i<buf_size; i++){
+        state= (state<<8) | buf[i];
+        if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100)
+            return i-3;
+    }
+    return 0;
+}
+
+AVCodecParser mpegvideo_parser = {
+    { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO },
+    sizeof(ParseContext1),
+    NULL,
+    mpegvideo_parse,
+    ff_parse1_close,
+    mpegvideo_split,
+};
+#endif /* !CONFIG_MPEGVIDEO_PARSER */
+
 /* this is ugly i know, but the alternative is too make
    hundreds of vars global and prefix them with ff_mpeg1_
    which is far uglier. */

libavcodec/mpegvideo.h

@@ -31,6 +31,7 @@
 #include "dsputil.h"
 #include "bitstream.h"
 #include "ratecontrol.h"
+#include "parser.h"
 
 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
 
@@ -142,17 +143,6 @@ typedef struct Picture{
     int b_frame_score;          /* */
 } Picture;
 
-typedef struct ParseContext{
-    uint8_t *buffer;
-    int index;
-    int last_index;
-    unsigned int buffer_size;
-    uint32_t state;             ///< contains the last few bytes in MSB order
-    int frame_start_found;
-    int overread;               ///< the number of bytes which where irreversibly read from the next frame
-    int overread_index;         ///< the index into ParseContext.buffer of the overreaded bytes
-} ParseContext;
-
 struct MpegEncContext;
 
 /**
@@ -717,9 +707,6 @@ void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
                                     int src_x, int src_y, int w, int h);
-#define END_NOT_FOUND -100
-int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size);
-void ff_parse_close(AVCodecParserContext *s);
 void ff_mpeg_flush(AVCodecContext *avctx);
 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
@@ -789,7 +776,6 @@ void mpeg1_encode_mb(MpegEncContext *s,
 void ff_mpeg1_encode_init(MpegEncContext *s);
 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
 void ff_mpeg1_clean_buffers(MpegEncContext *s);
-int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 
 
 /** RLTable. */
@@ -896,7 +882,6 @@ void ff_mpeg4_init_direct_mv(MpegEncContext *s);
 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
 int ff_h263_round_chroma(int x);
 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
-int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 
 
 /* rv10.c */
@@ -936,8 +921,5 @@ void mjpeg_picture_header(MpegEncContext *s);
 void mjpeg_picture_trailer(MpegEncContext *s);
 void ff_mjpeg_stuffing(PutBitContext * pbc);
 
-/* cavs.c */
-int ff_cavs_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
-
 #endif /* AVCODEC_MPEGVIDEO_H */
 

libavcodec/parser.c

@@ -22,6 +22,7 @@
 #include "avcodec.h"
 #include "mpegvideo.h"
 #include "mpegaudio.h"
+#include "parser.h"
 
 AVCodecParser *av_first_parser = NULL;
 
@@ -213,27 +214,6 @@ void av_parser_close(AVCodecParserContext *s)
 
 /*****************************************************/
 
-//#define END_NOT_FOUND (-100)
-
-#define PICTURE_START_CODE      0x00000100
-#define SEQ_START_CODE          0x000001b3
-#define EXT_START_CODE          0x000001b5
-#define SLICE_MIN_START_CODE    0x00000101
-#define SLICE_MAX_START_CODE    0x000001af
-
-typedef struct ParseContext1{
-    ParseContext pc;
-/* XXX/FIXME PC1 vs. PC */
-    /* MPEG2 specific */
-    AVRational frame_rate;
-    int progressive_sequence;
-    int width, height;
-
-    /* XXX: suppress that, needed by MPEG4 */
-    MpegEncContext *enc;
-    int first_picture;
-} ParseContext1;
-
 /**
  * combines the (truncated) bitstream to a complete frame
  * @returns -1 if no complete frame could be created
@@ -296,164 +276,6 @@ int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size)
     return 0;
 }
 
-#ifdef CONFIG_MPEGVIDEO_PARSER
-
-extern const AVRational ff_frame_rate_tab[];
-
-//FIXME move into mpeg12.c
-static void mpegvideo_extract_headers(AVCodecParserContext *s,
-                                      AVCodecContext *avctx,
-                                      const uint8_t *buf, int buf_size)
-{
-    ParseContext1 *pc = s->priv_data;
-    const uint8_t *buf_end;
-    uint32_t start_code;
-    int frame_rate_index, ext_type, bytes_left;
-    int frame_rate_ext_n, frame_rate_ext_d;
-    int picture_structure, top_field_first, repeat_first_field, progressive_frame;
-    int horiz_size_ext, vert_size_ext, bit_rate_ext;
-//FIXME replace the crap with get_bits()
-    s->repeat_pict = 0;
-    buf_end = buf + buf_size;
-    while (buf < buf_end) {
-        start_code= -1;
-        buf= ff_find_start_code(buf, buf_end, &start_code);
-        bytes_left = buf_end - buf;
-        switch(start_code) {
-        case PICTURE_START_CODE:
-            if (bytes_left >= 2) {
-                s->pict_type = (buf[1] >> 3) & 7;
-            }
-            break;
-        case SEQ_START_CODE:
-            if (bytes_left >= 7) {
-                pc->width  = (buf[0] << 4) | (buf[1] >> 4);
-                pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
-                avcodec_set_dimensions(avctx, pc->width, pc->height);
-                frame_rate_index = buf[3] & 0xf;
-                pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
-                pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
-                avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
-                avctx->codec_id = CODEC_ID_MPEG1VIDEO;
-                avctx->sub_id = 1;
-            }
-            break;
-        case EXT_START_CODE:
-            if (bytes_left >= 1) {
-                ext_type = (buf[0] >> 4);
-                switch(ext_type) {
-                case 0x1: /* sequence extension */
-                    if (bytes_left >= 6) {
-                        horiz_size_ext = ((buf[1] & 1) << 1) | (buf[2] >> 7);
-                        vert_size_ext = (buf[2] >> 5) & 3;
-                        bit_rate_ext = ((buf[2] & 0x1F)<<7) | (buf[3]>>1);
-                        frame_rate_ext_n = (buf[5] >> 5) & 3;
-                        frame_rate_ext_d = (buf[5] & 0x1f);
-                        pc->progressive_sequence = buf[1] & (1 << 3);
-                        avctx->has_b_frames= !(buf[5] >> 7);
-
-                        pc->width  |=(horiz_size_ext << 12);
-                        pc->height |=( vert_size_ext << 12);
-                        avctx->bit_rate += (bit_rate_ext << 18) * 400;
-                        avcodec_set_dimensions(avctx, pc->width, pc->height);
-                        avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
-                        avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
-                        avctx->codec_id = CODEC_ID_MPEG2VIDEO;
-                        avctx->sub_id = 2; /* forces MPEG2 */
-                    }
-                    break;
-                case 0x8: /* picture coding extension */
-                    if (bytes_left >= 5) {
-                        picture_structure = buf[2]&3;
-                        top_field_first = buf[3] & (1 << 7);
-                        repeat_first_field = buf[3] & (1 << 1);
-                        progressive_frame = buf[4] & (1 << 7);
-
-                        /* check if we must repeat the frame */
-                        if (repeat_first_field) {
-                            if (pc->progressive_sequence) {
-                                if (top_field_first)
-                                    s->repeat_pict = 4;
-                                else
-                                    s->repeat_pict = 2;
-                            } else if (progressive_frame) {
-                                s->repeat_pict = 1;
-                            }
-                        }
-
-                        /* the packet only represents half a frame
-                           XXX,FIXME maybe find a different solution */
-                        if(picture_structure != 3)
-                            s->repeat_pict = -1;
-                    }
-                    break;
-                }
-            }
-            break;
-        case -1:
-            goto the_end;
-        default:
-            /* we stop parsing when we encounter a slice. It ensures
-               that this function takes a negligible amount of time */
-            if (start_code >= SLICE_MIN_START_CODE &&
-                start_code <= SLICE_MAX_START_CODE)
-                goto the_end;
-            break;
-        }
-    }
- the_end: ;
-}
-
-static int mpegvideo_parse(AVCodecParserContext *s,
-                           AVCodecContext *avctx,
-                           uint8_t **poutbuf, int *poutbuf_size,
-                           const uint8_t *buf, int buf_size)
-{
-    ParseContext1 *pc1 = s->priv_data;
-    ParseContext *pc= &pc1->pc;
-    int next;
-
-    if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
-        next= buf_size;
-    }else{
-        next= ff_mpeg1_find_frame_end(pc, buf, buf_size);
-
-        if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
-            *poutbuf = NULL;
-            *poutbuf_size = 0;
-            return buf_size;
-        }
-
-    }
-    /* we have a full frame : we just parse the first few MPEG headers
-       to have the full timing information. The time take by this
-       function should be negligible for uncorrupted streams */
-    mpegvideo_extract_headers(s, avctx, buf, buf_size);
-#if 0
-    printf("pict_type=%d frame_rate=%0.3f repeat_pict=%d\n",
-           s->pict_type, (double)avctx->time_base.den / avctx->time_base.num, s->repeat_pict);
-#endif
-
-    *poutbuf = (uint8_t *)buf;
-    *poutbuf_size = buf_size;
-    return next;
-}
-
-static int mpegvideo_split(AVCodecContext *avctx,
-                           const uint8_t *buf, int buf_size)
-{
-    int i;
-    uint32_t state= -1;
-
-    for(i=0; i<buf_size; i++){
-        state= (state<<8) | buf[i];
-        if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100)
-            return i-3;
-    }
-    return 0;
-}
-#endif /* CONFIG_MPEGVIDEO_PARSER */
-
 void ff_parse_close(AVCodecParserContext *s)
 {
     ParseContext *pc = s->priv_data;
@@ -461,7 +283,7 @@ void ff_parse_close(AVCodecParserContext *s)
     av_free(pc->buffer);
 }
 
-static void parse1_close(AVCodecParserContext *s)
+void ff_parse1_close(AVCodecParserContext *s)
 {
     ParseContext1 *pc1 = s->priv_data;
 
@@ -1025,23 +847,13 @@ static int ac3_parse(AVCodecParserContext *s1,
 }
 #endif /* CONFIG_AC3_PARSER || CONFIG_AAC_PARSER */
 
-#ifdef CONFIG_MPEGVIDEO_PARSER
-AVCodecParser mpegvideo_parser = {
-    { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO },
-    sizeof(ParseContext1),
-    NULL,
-    mpegvideo_parse,
-    parse1_close,
-    mpegvideo_split,
-};
-#endif
 #ifdef CONFIG_MPEG4VIDEO_PARSER
 AVCodecParser mpeg4video_parser = {
     { CODEC_ID_MPEG4 },
     sizeof(ParseContext1),
     mpeg4video_parse_init,
     mpeg4video_parse,
-    parse1_close,
+    ff_parse1_close,
     mpeg4video_split,
 };
 #endif
@@ -1051,7 +863,7 @@ AVCodecParser cavsvideo_parser = {
     sizeof(ParseContext1),
     NULL,
     cavsvideo_parse,
-    parse1_close,
+    ff_parse1_close,
     mpeg4video_split,
 };
 #endif

libavcodec/parser.h

@@ -0,0 +1,64 @@
+/*
+ * AVCodecParser prototypes and definitions
+ * 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 FFMPEG_PARSER_H
+#define FFMPEG_PARSER_H
+
+typedef struct ParseContext{
+    uint8_t *buffer;
+    int index;
+    int last_index;
+    unsigned int buffer_size;
+    uint32_t state;             ///< contains the last few bytes in MSB order
+    int frame_start_found;
+    int overread;               ///< the number of bytes which where irreversibly read from the next frame
+    int overread_index;         ///< the index into ParseContext.buffer of the overreaded bytes
+} ParseContext;
+
+struct MpegEncContext;
+
+typedef struct ParseContext1{
+    ParseContext pc;
+/* XXX/FIXME PC1 vs. PC */
+    /* MPEG2 specific */
+    AVRational frame_rate;
+    int progressive_sequence;
+    int width, height;
+
+    /* XXX: suppress that, needed by MPEG4 */
+    struct MpegEncContext *enc;
+    int first_picture;
+} ParseContext1;
+
+#define END_NOT_FOUND (-100)
+
+int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size);
+void ff_parse_close(AVCodecParserContext *s);
+void ff_parse1_close(AVCodecParserContext *s);
+
+/* h263dec.c */
+int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
+
+/* cavs.c */
+int ff_cavs_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
+
+#endif /* !FFMPEG_PARSER_H */