Initial commit of work-in-progress MPEG video player plugin based on libmpeg2. Works on all targets with colour LCDs, but most optimised for the ipod Color/Photo and Nano. It currently only plays raw MPEG-1 or MPEG-2 video streams (no audio). Also adds a new lcd_yuv_blit() function to the plugin API - currently only implemented for the ipod Color/Photo and Nano.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10479 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 447 insertions, 0 deletions

diff --git a/apps/plugins/mpegplayer/decode.c b/apps/plugins/mpegplayer/decode.c
new file mode 100644
index 0000000000..613292699d
--- /dev/null
+++ b/apps/plugins/mpegplayer/decode.c
@@ -0,0 +1,447 @@
+/*
+ * decode.c
+ * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "plugin.h"
+
+#include "mpeg2dec_config.h"
+
+extern struct plugin_api* rb;
+
+#include "mpeg2.h"
+#include "attributes.h"
+#include "mpeg2_internal.h"
+
+static int mpeg2_accels = 0;
+
+#define BUFFER_SIZE (1194 * 1024)
+
+const mpeg2_info_t * mpeg2_info (mpeg2dec_t * mpeg2dec)
+{
+    return &(mpeg2dec->info);
+}
+
+static inline int skip_chunk (mpeg2dec_t * mpeg2dec, int bytes)
+{
+    uint8_t * current;
+    uint32_t shift;
+    uint8_t * limit;
+    uint8_t byte;
+
+    if (!bytes)
+        return 0;
+
+    current = mpeg2dec->buf_start;
+    shift = mpeg2dec->shift;
+    limit = current + bytes;
+
+    do {
+        byte = *current++;
+        if (shift == 0x00000100) {
+            int skipped;
+
+            mpeg2dec->shift = 0xffffff00;
+            skipped = current - mpeg2dec->buf_start;
+            mpeg2dec->buf_start = current;
+            return skipped;
+        }
+        shift = (shift | byte) << 8;
+    } while (current < limit);
+
+    mpeg2dec->shift = shift;
+    mpeg2dec->buf_start = current;
+    return 0;
+}
+
+static inline int copy_chunk (mpeg2dec_t * mpeg2dec, int bytes)
+{
+    uint8_t * current;
+    uint32_t shift;
+    uint8_t * chunk_ptr;
+    uint8_t * limit;
+    uint8_t byte;
+
+    if (!bytes)
+        return 0;
+
+    current = mpeg2dec->buf_start;
+    shift = mpeg2dec->shift;
+    chunk_ptr = mpeg2dec->chunk_ptr;
+    limit = current + bytes;
+
+    do {
+        byte = *current++;
+        if (shift == 0x00000100) {
+            int copied;
+
+            mpeg2dec->shift = 0xffffff00;
+            mpeg2dec->chunk_ptr = chunk_ptr + 1;
+            copied = current - mpeg2dec->buf_start;
+            mpeg2dec->buf_start = current;
+            return copied;
+        }
+        shift = (shift | byte) << 8;
+        *chunk_ptr++ = byte;
+    } while (current < limit);
+
+    mpeg2dec->shift = shift;
+    mpeg2dec->buf_start = current;
+    return 0;
+}
+
+void mpeg2_buffer (mpeg2dec_t * mpeg2dec, uint8_t * start, uint8_t * end)
+{
+    mpeg2dec->buf_start = start;
+    mpeg2dec->buf_end = end;
+}
+
+int mpeg2_getpos (mpeg2dec_t * mpeg2dec)
+{
+    return mpeg2dec->buf_end - mpeg2dec->buf_start;
+}
+
+static inline mpeg2_state_t seek_chunk (mpeg2dec_t * mpeg2dec)
+{
+    int size, skipped;
+
+    size = mpeg2dec->buf_end - mpeg2dec->buf_start;
+    skipped = skip_chunk (mpeg2dec, size);
+    if (!skipped) {
+        mpeg2dec->bytes_since_tag += size;
+        return STATE_BUFFER;
+    }
+    mpeg2dec->bytes_since_tag += skipped;
+    mpeg2dec->code = mpeg2dec->buf_start[-1];
+    return (mpeg2_state_t)-1;
+}
+
+mpeg2_state_t mpeg2_seek_header (mpeg2dec_t * mpeg2dec)
+{
+    while (mpeg2dec->code != 0xb3 &&
+           ((mpeg2dec->code != 0xb7 && mpeg2dec->code != 0xb8 &&
+             mpeg2dec->code) || mpeg2dec->sequence.width == (unsigned)-1))
+        if (seek_chunk (mpeg2dec) == STATE_BUFFER)
+            return STATE_BUFFER;
+    mpeg2dec->chunk_start = mpeg2dec->chunk_ptr = mpeg2dec->chunk_buffer;
+    mpeg2dec->user_data_len = 0;
+    return (mpeg2dec->code ? mpeg2_parse_header (mpeg2dec) :
+            mpeg2_header_picture_start (mpeg2dec));
+}
+
+#define RECEIVED(code,state) (((state) << 8) + (code))
+
+mpeg2_state_t mpeg2_parse (mpeg2dec_t * mpeg2dec)
+{
+    int size_buffer, size_chunk, copied;
+
+    if (mpeg2dec->action) {
+        mpeg2_state_t state;
+
+        state = mpeg2dec->action (mpeg2dec);
+        if ((int)state >= 0)
+            return state;
+    }
+
+    while (1) {
+        while ((unsigned) (mpeg2dec->code - mpeg2dec->first_decode_slice) <
+               mpeg2dec->nb_decode_slices) {
+            size_buffer = mpeg2dec->buf_end - mpeg2dec->buf_start;
+            size_chunk = (mpeg2dec->chunk_buffer + BUFFER_SIZE -
+                          mpeg2dec->chunk_ptr);
+            if (size_buffer <= size_chunk) {
+                copied = copy_chunk (mpeg2dec, size_buffer);
+                if (!copied) {
+                    mpeg2dec->bytes_since_tag += size_buffer;
+                    mpeg2dec->chunk_ptr += size_buffer;
+                    return STATE_BUFFER;
+                }
+            } else {
+                copied = copy_chunk (mpeg2dec, size_chunk);
+                if (!copied) {
+                    /* filled the chunk buffer without finding a start code */
+                    mpeg2dec->bytes_since_tag += size_chunk;
+                    mpeg2dec->action = seek_chunk;
+                    return STATE_INVALID;
+                }
+            }
+            mpeg2dec->bytes_since_tag += copied;
+
+            mpeg2_slice (&(mpeg2dec->decoder), mpeg2dec->code,
+                         mpeg2dec->chunk_start);
+            mpeg2dec->code = mpeg2dec->buf_start[-1];
+            mpeg2dec->chunk_ptr = mpeg2dec->chunk_start;
+        }
+        if ((unsigned) (mpeg2dec->code - 1) >= 0xb0 - 1)
+            break;
+        if (seek_chunk (mpeg2dec) == STATE_BUFFER)
+            return STATE_BUFFER;
+    }
+
+    switch (mpeg2dec->code) {
+    case 0x00:
+        mpeg2dec->action = mpeg2_header_picture_start;
+        return mpeg2dec->state;
+    case 0xb7:
+        mpeg2dec->action = mpeg2_header_end;
+        break;
+    case 0xb3:
+    case 0xb8:
+        mpeg2dec->action = mpeg2_parse_header;
+        break;
+    default:
+        mpeg2dec->action = seek_chunk;
+        return STATE_INVALID;
+    }
+    return (mpeg2dec->state == STATE_SLICE) ? STATE_SLICE : STATE_INVALID;
+}
+
+mpeg2_state_t mpeg2_parse_header (mpeg2dec_t * mpeg2dec)
+{
+    static int (* process_header[]) (mpeg2dec_t * mpeg2dec) = {
+        mpeg2_header_picture, mpeg2_header_extension, mpeg2_header_user_data,
+        mpeg2_header_sequence, NULL, NULL, NULL, NULL, mpeg2_header_gop
+    };
+    int size_buffer, size_chunk, copied;
+
+    mpeg2dec->action = mpeg2_parse_header;
+    mpeg2dec->info.user_data = NULL;    mpeg2dec->info.user_data_len = 0;
+    while (1) {
+        size_buffer = mpeg2dec->buf_end - mpeg2dec->buf_start;
+        size_chunk = (mpeg2dec->chunk_buffer + BUFFER_SIZE -
+                      mpeg2dec->chunk_ptr);
+        if (size_buffer <= size_chunk) {
+            copied = copy_chunk (mpeg2dec, size_buffer);
+            if (!copied) {
+                mpeg2dec->bytes_since_tag += size_buffer;
+                mpeg2dec->chunk_ptr += size_buffer;
+                return STATE_BUFFER;
+            }
+        } else {
+            copied = copy_chunk (mpeg2dec, size_chunk);
+            if (!copied) {
+                /* filled the chunk buffer without finding a start code */
+                mpeg2dec->bytes_since_tag += size_chunk;
+                mpeg2dec->code = 0xb4;
+                mpeg2dec->action = mpeg2_seek_header;
+                return STATE_INVALID;
+            }
+        }
+        mpeg2dec->bytes_since_tag += copied;
+
+        if (process_header[mpeg2dec->code & 0x0b] (mpeg2dec)) {
+            mpeg2dec->code = mpeg2dec->buf_start[-1];
+            mpeg2dec->action = mpeg2_seek_header;
+            return STATE_INVALID;
+        }
+
+        mpeg2dec->code = mpeg2dec->buf_start[-1];
+        switch (RECEIVED (mpeg2dec->code, mpeg2dec->state)) {
+
+        /* state transition after a sequence header */
+        case RECEIVED (0x00, STATE_SEQUENCE):
+            mpeg2dec->action = mpeg2_header_picture_start;
+        case RECEIVED (0xb8, STATE_SEQUENCE):
+            mpeg2_header_sequence_finalize (mpeg2dec);
+            break;
+
+        /* other legal state transitions */
+        case RECEIVED (0x00, STATE_GOP):
+            mpeg2_header_gop_finalize (mpeg2dec);
+            mpeg2dec->action = mpeg2_header_picture_start;
+            break;
+        case RECEIVED (0x01, STATE_PICTURE):
+        case RECEIVED (0x01, STATE_PICTURE_2ND):
+            mpeg2_header_picture_finalize (mpeg2dec, mpeg2_accels);
+            mpeg2dec->action = mpeg2_header_slice_start;
+            break;
+
+        /* legal headers within a given state */
+        case RECEIVED (0xb2, STATE_SEQUENCE):
+        case RECEIVED (0xb2, STATE_GOP):
+        case RECEIVED (0xb2, STATE_PICTURE):
+        case RECEIVED (0xb2, STATE_PICTURE_2ND):
+        case RECEIVED (0xb5, STATE_SEQUENCE):
+        case RECEIVED (0xb5, STATE_PICTURE):
+        case RECEIVED (0xb5, STATE_PICTURE_2ND):
+            mpeg2dec->chunk_ptr = mpeg2dec->chunk_start;
+            continue;
+
+        default:
+            mpeg2dec->action = mpeg2_seek_header;
+            return STATE_INVALID;
+        }
+
+        mpeg2dec->chunk_start = mpeg2dec->chunk_ptr = mpeg2dec->chunk_buffer;
+        mpeg2dec->user_data_len = 0;
+        return mpeg2dec->state;
+    }
+}
+
+int mpeg2_convert (mpeg2dec_t * mpeg2dec, mpeg2_convert_t convert, void * arg)
+{
+    mpeg2_convert_init_t convert_init;
+    int error;
+
+    error = convert (MPEG2_CONVERT_SET, NULL, &(mpeg2dec->sequence), 0,
+                     mpeg2_accels, arg, &convert_init);
+    if (!error) {
+        mpeg2dec->convert = convert;
+        mpeg2dec->convert_arg = arg;
+        mpeg2dec->convert_id_size = convert_init.id_size;
+        mpeg2dec->convert_stride = 0;
+    }
+    return error;
+}
+
+int mpeg2_stride (mpeg2dec_t * mpeg2dec, int stride)
+{
+    if (!mpeg2dec->convert) {
+        if (stride < (int) mpeg2dec->sequence.width)
+            stride = mpeg2dec->sequence.width;
+        mpeg2dec->decoder.stride_frame = stride;
+    } else {
+        mpeg2_convert_init_t convert_init;
+
+        stride = mpeg2dec->convert (MPEG2_CONVERT_STRIDE, NULL,
+                                    &(mpeg2dec->sequence), stride,
+                                    mpeg2_accels, mpeg2dec->convert_arg,
+                                    &convert_init);
+        mpeg2dec->convert_id_size = convert_init.id_size;
+        mpeg2dec->convert_stride = stride;
+    }
+    return stride;
+}
+
+void mpeg2_set_buf (mpeg2dec_t * mpeg2dec, uint8_t * buf[3], void * id)
+{
+    mpeg2_fbuf_t * fbuf;
+
+    if (mpeg2dec->custom_fbuf) {
+        if (mpeg2dec->state == STATE_SEQUENCE) {
+            mpeg2dec->fbuf[2] = mpeg2dec->fbuf[1];
+            mpeg2dec->fbuf[1] = mpeg2dec->fbuf[0];
+        }
+        mpeg2_set_fbuf (mpeg2dec, (mpeg2dec->decoder.coding_type ==
+                                   PIC_FLAG_CODING_TYPE_B));
+        fbuf = mpeg2dec->fbuf[0];
+    } else {
+        fbuf = &(mpeg2dec->fbuf_alloc[mpeg2dec->alloc_index].fbuf);
+        mpeg2dec->alloc_index_user = ++mpeg2dec->alloc_index;
+    }
+    fbuf->buf[0] = buf[0];
+    fbuf->buf[1] = buf[1];
+    fbuf->buf[2] = buf[2];
+    fbuf->id = id;
+}
+
+void mpeg2_custom_fbuf (mpeg2dec_t * mpeg2dec, int custom_fbuf)
+{
+    mpeg2dec->custom_fbuf = custom_fbuf;
+}
+
+void mpeg2_skip (mpeg2dec_t * mpeg2dec, int skip)
+{
+    mpeg2dec->first_decode_slice = 1;
+    mpeg2dec->nb_decode_slices = skip ? 0 : (0xb0 - 1);
+}
+
+void mpeg2_slice_region (mpeg2dec_t * mpeg2dec, int start, int end)
+{
+    start = (start < 1) ? 1 : (start > 0xb0) ? 0xb0 : start;
+    end = (end < start) ? start : (end > 0xb0) ? 0xb0 : end;
+    mpeg2dec->first_decode_slice = start;
+    mpeg2dec->nb_decode_slices = end - start;
+}
+
+void mpeg2_tag_picture (mpeg2dec_t * mpeg2dec, uint32_t tag, uint32_t tag2)
+{
+    mpeg2dec->tag_previous = mpeg2dec->tag_current;
+    mpeg2dec->tag2_previous = mpeg2dec->tag2_current;
+    mpeg2dec->tag_current = tag;
+    mpeg2dec->tag2_current = tag2;
+    mpeg2dec->num_tags++;
+    mpeg2dec->bytes_since_tag = 0;
+}
+
+uint32_t mpeg2_accel (uint32_t accel)
+{
+    if (!mpeg2_accels) {
+        if (accel & MPEG2_ACCEL_DETECT)
+            accel |= mpeg2_detect_accel ();
+        mpeg2_accels = accel |= MPEG2_ACCEL_DETECT;
+        mpeg2_cpu_state_init (accel);
+        mpeg2_idct_init (accel);
+        mpeg2_mc_init (accel);
+    }
+    return mpeg2_accels & ~MPEG2_ACCEL_DETECT;
+}
+
+void mpeg2_reset (mpeg2dec_t * mpeg2dec, int full_reset)
+{
+    mpeg2dec->buf_start = mpeg2dec->buf_end = NULL;
+    mpeg2dec->num_tags = 0;
+    mpeg2dec->shift = 0xffffff00;
+    mpeg2dec->code = 0xb4;
+    mpeg2dec->action = mpeg2_seek_header;
+    mpeg2dec->state = STATE_INVALID;
+    mpeg2dec->first = 1;
+
+    mpeg2_reset_info(&(mpeg2dec->info));
+    mpeg2dec->info.gop = NULL;
+    mpeg2dec->info.user_data = NULL;
+    mpeg2dec->info.user_data_len = 0;
+    if (full_reset) {
+        mpeg2dec->info.sequence = NULL;
+        mpeg2_header_state_init (mpeg2dec);
+    }
+
+}
+
+mpeg2dec_t * mpeg2_init (void)
+{
+    mpeg2dec_t * mpeg2dec;
+
+    mpeg2_accel (MPEG2_ACCEL_DETECT);
+
+    mpeg2dec = (mpeg2dec_t *) mpeg2_malloc (sizeof (mpeg2dec_t),
+                                            MPEG2_ALLOC_MPEG2DEC);
+    if (mpeg2dec == NULL)
+        return NULL;
+
+    rb->memset (mpeg2dec->decoder.DCTblock, 0, 64 * sizeof (int16_t));
+    rb->memset (mpeg2dec->quantizer_matrix, 0, 4 * 64 * sizeof (uint8_t));
+
+    mpeg2dec->chunk_buffer = (uint8_t *) mpeg2_malloc (BUFFER_SIZE + 4,
+                                                       MPEG2_ALLOC_CHUNK);
+
+    mpeg2dec->sequence.width = (unsigned)-1;
+    mpeg2_reset (mpeg2dec, 1);
+
+    return mpeg2dec;
+}
+
+void mpeg2_close (mpeg2dec_t * mpeg2dec)
+{
+    mpeg2_header_state_init (mpeg2dec);
+    mpeg2_free (mpeg2dec->chunk_buffer);
+    mpeg2_free (mpeg2dec);
+}